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77
Sep 18, 2013
09/13
by
Sujit S. Datta; Dustin D. Gerrard; Travers S. Rhodes; Thomas G. Mason; David A. Weitz
texts
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We show how attractive interactions dramatically influence emulsion rheology. Unlike the repulsive case, attractive emulsions below random close packing, RCP, can form soft gel-like elastic solids. However, above RCP, attractive and repulsive emulsions have similar elasticities. Such compressed attractive emulsions undergo an additional shear-driven relaxation process during yielding. Our results suggest that attractive emulsions begin to yield at weak points through the breakage of bonds, and,...
Source: http://arxiv.org/abs/1201.2680v1
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31
Sep 18, 2013
09/13
by
C. Bernard; T. Burch; S. Datta; T. DeGrand; C. DeTar; Steven Gottlieb; Urs M. Heller; K. Orginos; R. Sugar; D. Toussaint
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eye 31
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We present preliminary results for the heavy-light leptonic decay constants in the presence of three light dynamical flavors. We generate dynamical configurations with improved staggered and gauge actions and analyze them for heavy-light physics with tadpole improved clover valence quarks. When the scale is set by $m_\rho$, we find an increase of approximately 23% in $f_B$ with three dynamical flavors over the quenched case. Discretization errors appear to be small (of order 3% or less) in the...
Source: http://arxiv.org/abs/hep-lat/0110072v1
2
2.0
Jun 28, 2018
06/18
by
D. Andrew Brown; Gauri S. Datta; Nicole A. Lazar
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eye 2
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Over the last decade, large-scale multiple testing has found itself at the forefront of modern data analysis. In many applications data are correlated, so that the observed test statistic used for detecting a non-null case, or signal, at each location in a dataset carries some information about the chances of a true signal at other locations. Brown, Lazar, Datta, Jang, and McDowell (2014) proposed in the neuroimaging context a Bayesian multiple testing model that accounts for the dependence of...
Topics: Methodology, Statistics
Source: http://arxiv.org/abs/1512.03769
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2.0
Jun 30, 2018
06/18
by
S. Basak; S. Datta; N. Mathur; A. T. Lytle; P. Majumdar; M. Padmanath
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eye 2
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We present results of our continuing study on mixed-action hadron spectra and decay constants using overlap valence quarks on MILC's 2+1+1 flavor HISQ gauge configurations. This study is carried out on three lattice spacings, with charm and strange masses tuned to their physical values, and with m_l/m_s = 1/5. We present results of an ongoing determination of the mixed-action parameter Delta_{mix}, which enters into chiral formulae for the masses and decay constants.
Topic: High Energy Physics - Lattice
Source: http://arxiv.org/abs/1412.7248
87
87
Sep 20, 2013
09/13
by
M. Cheng; N. H. Christ; S. Datta; J. van der Heide; C. Jung; F. Karsch; O. Kaczmarek; E. Laermann; R. D. Mawhinney; C. Miao; P. Petreczky; K. Petrov; C. Schmidt; T. Umeda
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We present a detailed calculation of the transition temperature in QCD with two light and one heavier (strange) quark mass on lattices with temporal extent N_t =4 and 6. Calculations with improved staggered fermions have been performed for various light to strange quark mass ratios in the range, 0.05 0) limits we find for the transition temperature at the physical point T_c r_0 = 0.457(7) where the scale is set by the Sommer-scale parameter r_0 defined as the distance in the static quark...
Source: http://arxiv.org/abs/hep-lat/0608013v3
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3.0
Jun 30, 2018
06/18
by
Sujit S. Datta; T. S. Ramakrishnan; David A. Weitz
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eye 3
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We use confocal microscopy to directly visualize the formation and complex morphologies of trapped non-wetting fluid ganglia within a model 3D porous medium. The wetting fluid continues to flow around the ganglia after they form; this flow is characterized by a capillary number, Ca. We find that the ganglia configurations do not vary for small Ca; by contrast, as Ca is increased above a threshold value, the largest ganglia start to become mobilized and are ultimately removed from the medium. By...
Topics: Fluid Dynamics, Physics, Disordered Systems and Neural Networks, Mesoscale and Nanoscale Physics,...
Source: http://arxiv.org/abs/1402.6991
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5.0
Jun 30, 2018
06/18
by
Sujit S. Datta; Alireza Abbaspourrad; David A. Weitz
texts
eye 5
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We study the deformations of pH-responsive spherical microcapsules -- micrometer-scale liquid drops surrounded by thin, solid shells -- under the influence of electrostatic forces. When exposed to a large concentration of NaOH, the microcapsules become highly charged, and expand isotropically. We find that the extent of this expansion can be understood by coupling electrostatics with shell theory; moreover, the expansion dynamics is well described by Darcy's law for fluid flow through the...
Topics: Fluid Dynamics, Physics, Mesoscale and Nanoscale Physics, Soft Condensed Matter, Materials Science,...
Source: http://arxiv.org/abs/1401.8270
63
63
Sep 22, 2013
09/13
by
A. N. M. Zainuddin; S. Hong; L. Siddiqui; S. Datta
texts
eye 63
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A recent experiment reports a non-local spin-signal that shows oscillatory behavior as a function of gate voltage when the contacts are magnetized along the direction of current flow, but not when they are magnetized perpendicular to the current, in agreement with the predictions from a simple theory. In this paper we first present a straightforward extension of this theory to include the angular spectrum of electrons and the extended injecting and detecting contacts. The results are in good...
Source: http://arxiv.org/abs/1001.1523v2
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37
Sep 22, 2013
09/13
by
M. J. Bayarri; James O. Berger; Gauri S. Datta
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eye 37
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The Poisson distribution is often used as a standard model for count data. Quite often, however, such data sets are not well fit by a Poisson model because they have more zeros than are compatible with this model. For these situations, a zero-inflated Poisson (ZIP) distribution is often proposed. This article addresses testing a Poisson versus a ZIP model, using Bayesian methodology based on suitable objective priors. Specific choices of objective priors are justified and their properties...
Source: http://arxiv.org/abs/0805.3220v1
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46
Sep 18, 2013
09/13
by
Sujit S. Datta; Douglas R. Strachan; Samuel M. Khamis; A. T. Charlie Johnson
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eye 46
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We demonstrate a method by which few-layer graphene samples can be etched along crystallographic axes by thermally activated metallic nanoparticles. The technique results in long (>1 micron) crystallographic edges etched through to the insulating substrate, making the process potentially useful for atomically precise graphene device fabrication. This advance could enable atomically precise construction of integrated circuits from single graphene sheets with a wide range of technological...
Source: http://arxiv.org/abs/0806.3965v1
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47
Sep 23, 2013
09/13
by
C. Bernard; P. Williams; S. Datta; Steven Gottlieb; C. DeTar; Urs M. Heller; C. McNeile; K. Orginos; R. Sugar; D. Toussaint
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eye 47
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We compute the leptonic decay constants of heavy-light vector mesons in the quenched approximation. The reliability of lattice computations for heavy quarks is checked by comparing the ratio of vector to pseudoscalar decay constant with the prediction of Heavy Quark Effective Theory in the limit of infinitely heavy quark mass. Good agreement is found. We then calculate the decay constant ratio for B mesons: $f_{B^*}/f_B= 1.01(0.01)(^{+0.04}_{-0.01})$. We also quote quenched $f_{B^*}=177(6)(17)$...
Source: http://arxiv.org/abs/hep-lat/0109015v2
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51
Sep 18, 2013
09/13
by
C. Bernard; T. Burch; S. Datta; T. A. DeGrand; C. E. DeTar; Steven Gottlieb; U. M. Heller; K. Orginos; R. L. Sugar; D. Toussaint
texts
eye 51
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We present preliminary results from exploring the phase diagram of finite temperature QCD with three degenerate flavors and with two light flavors and the mass of the third held approximately at the strange quark mass. We use an order $\alpha_s^2 a^2, a^4$ Symanzik improved gauge action and an order $\alpha_s a^2, a^4$ improved staggered quark action. The improved staggered action leads to a dispersion relation with diminished lattice artifacts, and hence better thermodynamic properties. It...
Source: http://arxiv.org/abs/hep-lat/0110030v1
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33
Sep 22, 2013
09/13
by
F. Zahid; A. W. Ghosh; M. Paulsson; E. Polizzi; S. Datta
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eye 33
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We investigate the origin of asymmetry in various measured current-voltage (I-V) characteristics of molecules with no inherent spatial asymmetry, with particular focus on a recent break junction measurement. We argue that such asymmetry arises due to unequal coupling with the contacts and a consequent difference in charging effects, which can only be captured in a self-consistent model for molecular conduction. The direction of the asymmetry depends on the sign of the majority carriers in the...
Source: http://arxiv.org/abs/cond-mat/0403401v2
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42
Sep 18, 2013
09/13
by
S. Datta; O. Waldmann; A. D. Kent; V. A. Milway; L. K. Thompson; S. Hill
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eye 42
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High-frequency electron paramagnetic resonance (EPR) studies of the antiferromagnetic Mn-$[3\times 3]$ molecular grid clearly reveal a breaking of the $\Delta S = 0$ selection rule, providing direct evidence for the mixing of spin wavefunctions ($S$-mixing) induced by the comparable exchange and magneto-anisotropy energy scales within the grid. This finding highlights the potential utility of EPR for studies of exchange splittings in molecular nanomagnets, which is normally considered the sole...
Source: http://arxiv.org/abs/0707.4109v1
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33
Sep 18, 2013
09/13
by
B. Muralidharan; A. W. Ghosh; S. Datta
texts
eye 33
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We identify experimental signatures in the current-voltage (I-V) characteristics of weakly contacted molecules directly arising from excitations in their many electron spectrum. The current is calculated using a multielectron master equation in the Fock space of an exact diagonalized model many-body Hamiltonian for a prototypical molecule. Using this approach, we explain several nontrivial features in frequently observed I-Vs in terms of a rich spectrum of excitations that may be hard to...
Source: http://arxiv.org/abs/cond-mat/0505375v2
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43
Sep 19, 2013
09/13
by
A. W. Ghosh; S. Datta
texts
eye 43
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We discuss the factors that determine the overall shape and magnitude of the current-voltage (I-V) characteristics of a variety of molecular conductors sandwiched between two metallic contacts. We analyze the individual influences of the contact geometry, the molecular chemistry, the electrostatics of the environment, and charging on molecular conduction. Current conduction depends sensitively on the experimental geometry, as well as on the theoretical model for the molecule and the contacts....
Source: http://arxiv.org/abs/cond-mat/0303630v1
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37
Sep 19, 2013
09/13
by
S. Datta; S. Redner
texts
eye 37
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We investigate clogging in depth filtration, in which a dirty fluid is ``cleaned'' by the trapping of dirt particles within the pore space during flow through a porous medium. This leads to a gradient percolation process which exhibits a power law distribution for the density of trapped particles at downstream distance x from the input. To achieve a non-pathological clogging (percolation) threshold, the system length L should scale no faster than a power of ln w, where w is the width....
Source: http://arxiv.org/abs/cond-mat/9801147v1
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43
Sep 23, 2013
09/13
by
S. Wissel; S. Datta; F. Karsch; E. Laermann; S. Shcheredin
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eye 43
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We present preliminary results for the correlation- and spectral functions of different meson channels on the lattice. The main focus lies on gaining control over cut-off as well as on the finite-volume effects. Extrapolations of screening masses above the deconfining temperature are guided by the result of the free ($T=\infty$) case on the lattice and in the continuum. We study the quenched non-perturbatively improved Wilson-clover fermion as well as the hypercube fermion action which might...
Source: http://arxiv.org/abs/hep-lat/0510031v2
3
3.0
Jun 30, 2018
06/18
by
Sujit S. Datta; Jean-Baptiste Dupin; David A. Weitz
texts
eye 3
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We use confocal microscopy to directly visualize the simultaneous flow of both a wetting and a non-wetting fluid through a model three-dimensional (3D) porous medium. We find that, for small flow rates, both fluids flow through unchanging, distinct, connected 3D pathways; in stark contrast, at sufficiently large flow rates, the non-wetting fluid is broken up into discrete ganglia. By performing experiments over a range of flow rates, using fluids of different viscosities, and with porous media...
Topics: Fluid Dynamics, Physics, Disordered Systems and Neural Networks, Mesoscale and Nanoscale Physics,...
Source: http://arxiv.org/abs/1406.7045
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47
Sep 22, 2013
09/13
by
C. Bernard; S. Datta; C. DeTar; S. Gottlieb; U. M. Heller; J. Hetrick; C. Mcneile; K. Orginos; R. Sugar; D. Toussaint
texts
eye 47
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We present results for pseudoscalar decay constants of heavy-light mesons using both quenched and N_f = 2 dynamical fermion configurations. A variety of fermion actions is investigated : Wilson, nonperturbative clover, and fat-link clover. For heavy quarks the Fermilab formalism is applied. In the quenched approximation, results with the nonperturbatively improved clover action of the Alpha collaboration allow us to study the systematic error of the continuum extrapolation from the Wilson...
Source: http://arxiv.org/abs/hep-lat/0011029v1
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53
Sep 22, 2013
09/13
by
L. Siddiqui; A. N. M. Zainuddin; S. Datta
texts
eye 53
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It is well-known that the Curie temperature, and hence the magnetization, in diluted magnetic semiconductor (DMS) like Ga$_{1-x}$Mn$_x$As can be controlled by changing the equilibrium density of holes in the material. Here, we propose that even with a constant hole density, large changes in the magnetization can be obtained with a relatively small imbalance in the quasi-Fermi levels for up-spin and down-spin electrons. We show, by coupling mean field theory of diluted magnetic semiconductor...
Source: http://arxiv.org/abs/0811.1225v2
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81
Sep 18, 2013
09/13
by
L. Siddiqui; A. W. Ghosh; S. Datta
texts
eye 81
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We explore electronic transport in a nanotube quantum dot strongly coupled with vibrations and weakly with leads and the thermal environment. We show that the recent observation of anomalous conductance signatures in single-walled carbon nanotube (SWCNT) quantum dots can be understood quantitatively in terms of current driven `hot phonons' that are strongly correlated with electrons. Using rate equations in the many-body configuration space for the joint electron-phonon distribution, we argue...
Source: http://arxiv.org/abs/cond-mat/0606273v2
VIGYAN PRASAR, POPULAR SCIENCE, WATER KEY DRIVING FORCE, ENGLISH
Topics: VIGYAN PRASAR, POPULAR SCIENCE
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45
Sep 21, 2013
09/13
by
Sujit S. Datta; David A. Weitz
texts
eye 45
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We show that when a non-wetting fluid drains a stratified porous medium at sufficiently small capillary numbers Ca, it flows only through the coarsest stratum of the medium; by contrast, above a threshold Ca, the non-wetting fluid is also forced laterally, into part of the adjacent, finer strata. The spatial extent of this partial invasion increases with Ca. We quantitatively understand this behavior by balancing the stratum-scale viscous pressure driving the flow with the capillary pressure...
Source: http://arxiv.org/abs/1301.5253v1
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48
Sep 23, 2013
09/13
by
M. Cheng; N. H. Christ; S. Datta; J. van der Heide; C. Jung; F. Karsch; O. Kaczmarek; E. Laermann; R. D. Mawhinney; C. Miao; P. Petreczky; K. Petrov; C. Schmidt; W. Soeldner; T. Umeda
texts
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We present results on the equation of state in QCD with two light quark flavors and a heavier strange quark. Calculations with improved staggered fermions have been performed on lattices with temporal extent Nt =4 and 6 on a line of constant physics with almost physical quark mass values; the pion mass is about 220 MeV, and the strange quark mass is adjusted to its physical value. High statistics results on large lattices are obtained for bulk thermodynamic observables, i.e. pressure, energy...
Source: http://arxiv.org/abs/0710.0354v2
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33
Sep 22, 2013
09/13
by
Sujit S. Datta; Douglas R. Strachan; A. T. Charlie Johnson
texts
eye 33
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The realization of single-molecule electronic devices, in which a nanometer-scale molecule is connected to macroscopic leads, requires the reproducible production of highly ordered nanoscale gaps in which a molecule of interest is electrostatically coupled to nearby gate electrodes. Understanding how the molecule-gate coupling depends on key parameters is crucial for the development of high-performance devices. Here we directly address this, presenting two- and three-dimensional finite-element...
Source: http://arxiv.org/abs/0812.3177v2
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134
Sep 24, 2013
09/13
by
N. Brambilla; M. Krämer; R. Mussa; A. Vairo; G. Bali; G. T. Bodwin; E. Braaten; E. Eichten; S. Eidelman; S. Godfrey; A. Hoang; M. Jamin; D. Kharzeev; M. P. Lombardo; C. Lourenco; A. B. Meyer; V. Papadimitriou; C. Patrignani; M. Rosati; M. A. Sanchis-Lozano; H. Satz; J. Soto; D. Z. Besson; D. Bettoni; A. Böhrer; S. Boogert; C. -H. Chang; P. Cooper; P. Crochet; S. Datta; C. Davies; A. Deandrea; R. Faustov; T. Ferguson; R. Galik; F. A. Harris; O. Iouchtchenko; O. Kaczmarek; F. Karsch; M. Kienzle; V. V. Kiselev; S. R. Klein; P. Kroll; A. Kronfeld; Y. -P. Kuang; V. Laporta; Jungil Lee; A. Leibovich; J. P. Ma; P. Mackenzie; L. Maiani; M. L. Mangano; A. Meyer; X. H. Mo; C. Morningstar; A. Nairz; J. Napolitano; S. Olsen; A. Penin; P. Petreczky; F. Piccinini; A. Pineda; A. D. Polosa; L. Ramello; R. Rapp; J. -M. Richard; V. Riquer; S. Ricciardi; E. Robutti; O. Schneider; E. Scomparin; J. Simone; T. Skwarnicki; G. Stancari; I. W. Stewart; Yu. Sumino; T. Teubner; J. Tseng; R. Vogt; P. Wang; B. Yabsley; C. Z. Yuan; F. Zantow; Z. G. Zhao; A. Zieminski
texts
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This report is the result of the collaboration and research effort of the Quarkonium Working Group over the last three years. It provides a comprehensive overview of the state of the art in heavy-quarkonium theory and experiment, covering quarkonium spectroscopy, decay, and production, the determination of QCD parameters from quarkonium observables, quarkonia in media, and the effects on quarkonia of physics beyond the Standard Model. An introduction to common theoretical and experimental tools...
Source: http://arxiv.org/abs/hep-ph/0412158v2
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48
Sep 18, 2013
09/13
by
Trevor J. Sweeting; Gauri S. Datta; Malay Ghosh
texts
eye 48
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We explore the construction of nonsubjective prior distributions in Bayesian statistics via a posterior predictive relative entropy regret criterion. We carry out a minimax analysis based on a derived asymptotic predictive loss function and show that this approach to prior construction has a number of attractive features. The approach here differs from previous work that uses either prior or posterior relative entropy regret in that we consider predictive performance in relation to alternative...
Source: http://arxiv.org/abs/math/0605609v1
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40
Sep 21, 2013
09/13
by
M. P. Anantram; S. Datta; Yongxiang Xue
texts
eye 40
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The modeling of carbon nanotube-metal contacts is important from both basic and applied view points. For many applications, it is important to design contacts such that the transmission is dictated by intrinsic properties of the nanotube rather than by details of the contact. In this paper, we calculate the electron transmission probability from a nanotube to a free electron metal, which is side-contacted. If the metal-nanotube interface is sufficiently ordered, we find that k-vector...
Source: http://arxiv.org/abs/cond-mat/9907357v2
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50
Sep 21, 2013
09/13
by
Sujit S. Datta; Ho Cheung Shum; David A. Weitz
texts
eye 50
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We introduce a new experimental approach to study the structural transitions of large numbers of nanoparticle-coated droplets as their volume is reduced. We use an emulsion system where the dispersed phase is slightly soluble in the continuous phase. By adding a fixed amount of unsaturated continuous phase, the volume of the droplets can be controllably reduced, causing them to buckle or crumple, thereby becoming nonspherical. The resultant morphologies depend both on the extent of volume...
Source: http://arxiv.org/abs/1011.4271v1
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40
Sep 18, 2013
09/13
by
S. Datta; M. Kabir; S. Ganguly; B. Sanyal; T. Saha-Dasgupta; A. Mookerjee
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The structural, electronic and magnetic properties of Co$_n$ clusters ($n=2-$20) have been investigated using density functional theory within the pseudopotential plane wave method. An unusual hexagonal growth pattern has been observed in the intermediate size range, $n=15-$20. The cobalt atoms are ferromagnetically ordered and the calculated magnetic moments are found to be higher than that of corresponding hcp bulk value, which are in good agreement with the recent Stern-Gerlach experiments....
Source: http://arxiv.org/abs/0707.3828v1
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8.0
Feb 12, 2020
02/20
by
K K Dhir; K S Datta
texts
eye 8
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3
3.0
Mar 6, 2021
03/21
by
Rai Bahadur B. M. Das, Chairman ; M. Balasundaram Naidu, Members; Jamal Moideen, Members; A. C. Inskip, Members; Kaiser Ahmed, Members; Bool Chand, Members; Capt. P. S. Choudhury, Members; S. Datta, Secretary; P. S. Pandit, Members; S. K. Sen, Members; H. Raney, Members; S. Datta, Members; A. K. Datta , Secretary
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Topics: Oil inspection - India, Oil industry - India, Oil Industries - Protection - India, Indian Tariff...
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44
Sep 20, 2013
09/13
by
M. Paulsson; S. Datta
texts
eye 44
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We provide a theoretical estimate of the thermoelectric current and voltage over a Phenyldithiol molecule. We also show that the thermoelectric voltage is (1) easy to analyze, (2) insensitive to the detailed coupling to the contacts, (3) large enough to be measured and (4) give valuable information, which is not readily accessible through other experiments, on the location of the Fermi energy relative to the molecular levels. The location of the Fermi-energy is poorly understood and...
Source: http://arxiv.org/abs/cond-mat/0301232v1
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Sep 19, 2013
09/13
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The MILC Collaboration; C. Bernard; S. Datta; T. DeGrand; C. DeTar; Steven Gottlieb; Urs M. Heller; C. McNeile; K. Orginos; R. Sugar; D. Toussaint
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We present results for $f_B$, $f_{B_s}$, $f_D$, $f_{D_s}$ and their ratios in the presence of two flavors of light sea quarks ($N_f=2$). We use Wilson light valence quarks and Wilson and static heavy valence quarks; the sea quarks are simulated with staggered fermions. Additional quenched simulations with nonperturbatively improved clover fermions allow us to improve our control of the continuum extrapolation. For our central values the masses of the sea quarks are not extrapolated to the...
Source: http://arxiv.org/abs/hep-lat/0206016v2
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82
Jul 22, 2013
07/13
by
Sujit S. Datta; Douglas R. Strachan; E. J. Mele; A. T. Charlie Johnson
texts
eye 82
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Graphene-derived nanomaterials are emerging as ideal candidates for postsilicon electronics. Elucidating the electronic interaction between an insulating substrate and few-layer graphene (FLG) films is crucial for device applications. Here, we report electrostatic force microscopy (EFM) measurements revealing that the FLG surface potential increases with film thickness, approaching a "bulk" value for samples with five or more graphene layers. This behavior is in sharp contrast with...
Source: http://arxiv.org/abs/0807.1650v1
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40
Sep 22, 2013
09/13
by
Archan Bhattacharya; Bertrand S. Clarke; Gauri S. Datta
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Power series distributions form a useful subclass of one-parameter discrete exponential families suitable for modeling count data. A zero-inflated power series distribution is a mixture of a power series distribution and a degenerate distribution at zero, with a mixing probability $p$ for the degenerate distribution. This distribution is useful for modeling count data that may have extra zeros. One question is whether the mixture model can be reduced to the power series portion, corresponding...
Source: http://arxiv.org/abs/0805.2258v1
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Sep 18, 2013
09/13
by
M. Cheng; S. Datta; J. van der Heide; K. Huebner; F. Karsch; O. Kaczmarek; E. Laermann; J. Liddle; R. D. Mawhinney; C. Miao; P. Petreczky; K. Petrov; C. Schmidt; W. Soeldner; T. Umeda
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We calculate the spatial string tension in (2+1) flavor QCD with physical strange quark mass and almost physical light quark masses using lattices with temporal extent N_tau=4,6 and 8. We compare our results on the spatial string tension with predictions of dimensionally reduced QCD. This suggests that also in the presence of light dynamical quarks dimensional reduction works well down to temperatures 1.5T_c.
Source: http://arxiv.org/abs/0806.3264v1
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Sep 19, 2013
09/13
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M. Cheng; S. Datta; A. Francis; J. van der Heide; C. Jung; O. Kaczmarek; F. Karsch; E. Laermann; R. D. Mawhinney; C. Miao; S. Mukherjee; P. Petreczky; J. Rantaharju; C. Schmidt; W. Soeldner
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We present results for screening masses of mesons built from light and strange quarks in the temperature range of approximately between 140 MeV to 800 MeV. The lattice computations were performed with 2+1 dynamical light and strange flavors of improved (p4) staggered fermions along a line of constant physics defined by a pion mass of about 220 MeV and a kaon mass of 500 MeV. The lattices had temporal extents Nt = 4, 6 and 8 and aspect ratios of Ns / Nt \geq 4. At least up to a temperature of...
Source: http://arxiv.org/abs/1010.1216v2
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73
Sep 21, 2013
09/13
by
Sujit S. Datta
texts
eye 73
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Molten metallic nanoparticles have recently been used to construct graphene nanostructures with crystallographic edges. The mechanism by which this happens, however, remains unclear. Here, we present a simple model that explains how a droplet can etch graphene. Two factors possibly contribute to this process: a difference between the equilibrium wettability of graphene and the substrate that supports it, or the large surface energy associated with the graphene edge. We calculate the etching...
Source: http://arxiv.org/abs/1008.2203v1
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43
Sep 22, 2013
09/13
by
S . Datta
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We study the ground and excited states of weakly interacting Bose gases (with positive and negative scattering lengths) in connection with Bose Einstein Condensation to test the validity of the mean field theory and Born approximation. They behave as new quantum fluids (a gas in the weak limit and a liquid in the dense limit and we study their many body physics in the dilute limit within the realistic potential model (Morse type) by Feynman-Kac path integral technique. Within numerical...
Source: http://arxiv.org/abs/cond-mat/0603016v2
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Sep 18, 2013
09/13
by
Sujit S. Datta; Shin-Hyun Kim; Jayson Paulose; Alireza Abbaspourrad; David R. Nelson; David A. Weitz
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Colloidal capsules can sustain an external osmotic pressure; however, for a sufficiently large pressure, they will ultimately buckle. This process can be strongly influenced by structural inhomogeneities in the capsule shells. We explore how the time delay before the onset of buckling decreases as the shells are made more inhomogeneous; this behavior can be quantitatively understood by coupling shell theory with Darcy's law. In addition, we show that the shell inhomogeneity can dramatically...
Source: http://arxiv.org/abs/1209.0758v2
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45
Sep 19, 2013
09/13
by
F. Karsch; S. Datta; E. Laermann; P. Petreczky; S. Stickan; I. Wetzorke
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We discuss information on thermal modifications of hadron properties which can be extracted from the structure of Euclidean correlation functions of hadronic currents as well as more direct information obtained through the reconstruction of the spectral functions based on the Maximum Entropy Method.
Source: http://arxiv.org/abs/hep-ph/0209028v1
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48
Sep 22, 2013
09/13
by
L. Siddiqui; D. Saha; S. Datta; P. Bhattacharya
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We propose a model to explore the dynamics of spin-systems coupled by exchange interaction to the conduction band electrons of a semiconductor material that forms the channel in a ferromagnet/semiconductor/ferromagnet spin-valve structure. We show that recent observation of the novel transient transport signature in a MnAs/GaAs/MnAs spin-valve structure with paramagnetic Mn impurities [D. Saha et al., Phys. Rev. Lett., 100, 196603 (2008)] can be quantitatively understood in terms of current...
Source: http://arxiv.org/abs/0811.0204v1
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39
Sep 22, 2013
09/13
by
P. Petreczky; S. Datta; F. Karsch; I. Wetzorke
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We study charmoinum correlators and spectral functions at finite temperature within the quenched approximation using isotropic lattices with lattice spacing a^-1=4.86 GeV and 9.72 GeV. Although we observe some medium modifications of the ground state charmonium spectral function above deconfinement, we find that ground state charmonia (J/psi and eta_c) exist in the deconfined phase at least up to temperatures as high as 1.5Tc. P-wave charmonia (chi_c) on the other hand are dissociated already...
Source: http://arxiv.org/abs/hep-lat/0309012v1
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Sep 23, 2013
09/13
by
M. R. Delbecq; L. E. Bruhat; J. J. Viennot; S. Datta; A. Cottet; T. Kontos
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Engineering the interaction between light and matter is an important goal in the emerging field of quantum opto-electronics. Thanks to the use of cavity quantum electrodynamics architectures, one can envision a fully hybrid multiplexing of quantum conductors. Here, we use such an architecture to couple two quantum dot circuits . Our quantum dots are separated by 200 times their own size, with no direct tunnel and electrostatic couplings between them. We demonstrate their interaction, mediated...
Source: http://arxiv.org/abs/1303.2639v1
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1.0
Mar 7, 2021
03/21
by
S. Datta, Chairman; S.R. Chadha, Member; H.S. Bawa, Member; Y.K. Subrahmanyam, Member; V.A. Mehta, Member; R.N.Mohan, Member
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Topics: Food adulteration and inspection-India, Slaughtering and slaughter-Houses-India, Meat...
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31
Sep 22, 2013
09/13
by
H. S. Das; A. Suklabaidya; S. Datta Majumder; A. K. Sen
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In our present study, the observed linear polarization data of comet Hyakutake are studied at wavelengths $\lambda=0.365\mu m$, $\lambda=0.485\mu m$ and 0.684$\mu m$ through simulations using Ballistic Particle-Cluster Aggregate and Ballistic Cluster-Cluster Aggregate aggregates of 128 spherical monomers. We first investigated that the size parameter of the monomer, $x$ $\sim$ 1.56 -- 1.70, turned out to be most suitable which provides the best fits to the observed dust scattering properties at...
Source: http://arxiv.org/abs/1001.0633v1
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Sep 20, 2013
09/13
by
MILC Collaboration; C. Bernard; S. Datta; C. DeTar; Steven Gottlieb; E. B. Gregory; U. M. Heller; J. Osborn; R. L. Sugar; D. Toussaint
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Starting in 2001, the MILC Collaboration began a large scale calculation of heavy-light meson decay constants using clover valence quarks on ensembles of three flavor configurations. For the coarse configurations, with a=0.12 fm, eight combinations of dynamical light and strange quarks have been analyzed. For the fine configurations, with a=0.09 fm, three combinations of quark masses are studied. Since we last reported on this calculation, statistics have been increased on the fine ensembles,...
Source: http://arxiv.org/abs/hep-lat/0410014v1
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Sep 23, 2013
09/13
by
S Datta
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We investigate the thermodynamic properties of a trappoed Bose gas of Rb atoms interacting through a repulsive potential by Quantum Monte Carlo method based upon the generalization of Feynman-Kac method[1] applicable to many body systems at T=0 to finite temperatures. In this letter,we report the temperature variation of condensation fraction, chemical potential,density profile, total energy of the system, release energy, frequency shifts and moment of inertia within the realistic potential...
Source: http://arxiv.org/abs/cond-mat/0511647v5