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Direct Minimization for Ensemble Electronic Structure Calculations
Direct Minimization Ensemble Electronic Structure Calculations Computational Physics
2012/4/19
We consider a direct optimization approach for ensemble density functional theory electronic structure calculations. The update operator for the electronic orbitals takes the structure of the Stiefel ...
Storage and Retrieval of an Image using Four-Wave Mixing in a Cold Atomic Ensemble
Storage Retrieval of an Image Four-Wave Mixing Cold Atomic Ensemble
2012/4/19
We experimentally realized storage and retrieval of an image of light in a cigar-shaped atomic cloud of Rubidium 85 using four-wave mixing (FWM) for the first time. The input signal and the generated ...
Induced Ginibre ensemble of random matrices and quantum operations
Induced Ginibre ensemble random matrices quantum operations
2011/9/20
Abstract: A generalisation of the Ginibre ensemble of non-Hermitian random square matrices is introduced. The corresponding probability measure is induced by the ensemble of rectangular Gaussian matri...
Coherent manipulation of spin wave vector for polarization of photons in an atomic ensemble
spin wave vector Coherent manipulation polarization of photons atomic ensemble
2011/8/3
Abstract: We experimentally demonstrate the manipulation of two-orthogonal components of a spin wave in an atomic ensemble. Based on Raman two-photon transition and Larmor spin precession induced by m...
Proportionate vs disproportionate distribution of wealth of two individuals in a tempered Paretian ensemble
Pareto law, Paretian ensemble, Truncated wealth distribution,Fluctuations
2011/9/15
We study the distribution P(!) of the random variable ! = x1/(x1 + x2),where x1 and x2 are the wealths of two individuals selected at random from the same tempered Paretian ensemble characterized by t...
Phase structure of black branes in grand canonical ensemble
Phase structure black branes canonical ensemble
2010/12/24
This is a companion paper of our previous work where we studied the thermodynamics and phase structure of asymptotically flat black p-branes in a cavity in arbitrary dimensions D in a canonical ensemb...
We present measurements of the cross-correlation function of photon pairs at 780 nm and 1367 nm, generated in a hot rubidium vapor cell. The temporal character of the biphoton is determined by the di...
Out of equilibrium statistical ensemble inequivalence
equilibrium statistical ensemble inequivalence
2010/11/22
A modified version of the Hamiltonian Mean Field model is considered, by including the effect
of an externally imposed magnetic field. This latter is shown to significantly alter the system
behaviou...
Statistical mechanical analysis of hierarchical random code ensemble in signal processing
Statistical mechanical analysis hierarchical random code ensemble signal processing
2010/11/23
We study a random code ensemble with a hierarchical structure, which is closely related to generalized random energy model with discrete energy values.Based on this correspondence, we analyze this ens...
Solvable phase diagrams and ensemble inequivalence for two-dimensional and geophysical turbulent flows
phase diagrams inequivalence two-dimensional geophysical turbulent flows
2010/11/16
Using explicit analytical computations, generic occurrence of inequivalence between two or more statistical ensembles is obtained for a large class of equilibrium states of two-dimensional and geophy...
The classicality and quantumness of a quantum ensemble
classicality quantumness quantum ensemble
2010/11/8
In this paper, we investigate the classicality and quantumness of a quantum ensemble. We define a quantity called classicality to characterize how classical a quantum ensemble is. An ensemble of commu...
An alternative to the conventional micro-canonical ensemble
alternative conventiona micro-canonical ensemble
2010/11/11
Usual approach to the foundations of quantum statistical physics is based on conventional micro-canonical ensemble as a starting point for deriving Boltzmann-Gibbs (BG) equilibrium. It leaves, howeve...
Entanglement is the quintessential quantum phenomenon and a necessary ingredient in most emerging quantum technologies, including quantum repeaters, quantum information processing (QIP) and the strong...
Solid state multi-ensemble quantum computer in waveguide circuit model
Solid state multi-ensemble quantum computer waveguide circuit model
2010/10/21
The first realization of solid state quantum computer was demonstrated recently by using artificial atoms – transmons in superconducting resonator. Here, we propose a novel architecture of flexible an...
Asymptotic mean density of sub-unitary ensemble
Asymptotic mean density sub-unitary ensemble
2010/4/7
The large N limit of mean spectral density for the ensemble of NxN sub-unitary matrices derived by Wei and Fyodorov (J. Phys. A: Math. Theor. 41 (2008) 50201) is calculated by a modification of the sa...