搜索结果: 1-15 共查到“理学 the density matrix”相关记录16条 . 查询时间(0.325 秒)
Compressed Representation of Kohn−Sham Orbitals via Selected Columns of the Density Matrix
Compressed Representation Kohn− Sham Orbitals Selected Columns Density Matrix
2015/7/14
Given a set of Kohn−Sham orbitals from an insulating system, we present a simple, robust, efficient, and highly parallelizable method to construct a set of optionally orthogonal, localized basis...
Contradiction of the DENSITY MATRIX notion in quantum mechanics
Contradiction of the DENSITY MATRIX notion quantum mechanics General Physics
2012/4/19
It is shown that description of a nonpolarized neutron beam by density matrix is contradictory. Density matrix is invariant with respect to choice of quantization axis, while experimental devices can ...
Equilibrium-reduced density matrix formulation: Influence of noise, disorder, and temperature on localization in excitonic systems
Equilibrium-reduced density matrix formulation noise disorder temperature localization in exciton systems
2014/9/24
An exact method to compute the entire equilibrium-reduced density matrix for systems characterized by a system-bath Hamiltonian is presented. The approach is based upon a stochastic unraveling of the ...
Exact density functional theory with the density matrix renormalization group
density functional theory density matrix renormalization group electronic structure models
2011/8/17
Abstract: Combining density functional theory with controlled numerical methods for strongly correlated systems could greatly extend the range of both. We use the density matrix renormalization group ...
Testing the density matrix expansion against ab initio calculations of trapped neutron drops
density matrix neutron drops
2011/7/20
Microscopic input to a universal nuclear energy density functional can be provided through the density matrix expansion (DME), which has recently been revived and improved.
Applications of density matrix in the fractional quantum mechanics
Applications of density matrix fractional quantum mechanics
2011/2/25
The many-body space fractional quantum system is studied using the density matrix method. We give the new results of the Thomas-Fermi model, and obtain the quantum pressure of the free electron gas. W...
Time-dependent occupation numbers in reduced-density-matrix functional theory: Correlation-induced oscillations
Time-dependent occupation numbers reduced-density-matrix functional theory
2010/11/18
We prove that if the two-body terms in the equation of motion for the one-body reduced density
matrix are approximated at each instant of time from ground-state functionals, the eigenvalues of the on...
Comment on "Response calculations with an independent particle system with an exact one-particle density matrix''
calculations independent particle system one-particle density matrix
2010/11/16
We point out an error in the argument [PRL 105, 013002 (2010)] that the time independence of the occupation numbers in the adiabatic approximation follows from the invariance of the ground-state inter...
Coupled-channels density-matrix approach to low-energy nuclear collision dynamics: A technique for quantifying quantum decoherence effects on reaction observables
Coupled-channels density-matrix low-energy nuclear collision dynamics reaction observables
2010/11/11
The coupled-channels density-matrix technique for nuclear reaction dynamics, which is based on the Liouville-von Neumann equation with Lindblad dissipative terms, is developed with the inclusion of fu...
On the relationship between parametric two-electron reduced-density-matrix methods and the coupled electron pair approximation
parametric two-electron reduced-density-matrix methods coupled electron pair approximation
2010/10/21
Parametric two-electron reduced-density-matrix (p-2RDM) methods have enjoyed much success
in recent years; the methods have been shown to exhibit accuracies greater than coupled cluster
with single ...
On the relationship between parametric two-electron reduced-density-matrix methods and the coupled electron pair approximation
On the relationship between parametric two-electron reduced-density-matrix methods coupled electron pair approximation
2010/12/15
Parametric two-electron reduced-density-matrix (p-2RDM) methods have enjoyed much success
in recent years; the methods have been shown to exhibit accuracies greater than coupled cluster
with single ...
A simple way to avoid metastable configurations in the density-matrix renormalization-group algorithms
spin model DMRG spin-1
2010/7/8
We use the spin-1 Heisenberg chain with periodic boundary conditions to ilustrate that the systems get stuck in metastable configurations only when the density-matrix renormalization-group algorithm s...
Secure Direct Communication Using Ensembles with
the Same Compressed Density Matrix
quantum secure direct communication ensembles with the same
density matrix global measurement
2007/8/15
2006Vol.46No.3pp.440-442DOI:
Secure Direct Communication Using Ensembles with
the Same Compressed Density Matrix
WANG Chuan,1 LI Yan-Song,1 and LONG Gui-Lu1,2
1 Departm...
Density Matrix and Squeezed Vacuum State for General Coupling
Harmonic Oscillator
density matrix squeezed
vacuum state coupling harmonic oscillator
2007/8/15
2003Vol.40No.5pp.523-526DOI:
Density Matrix and Squeezed Vacuum State for General Coupling
Harmonic Oscillator
SONG Tong-Qiang
Department of Physics, Ningbo University,...
No-relationship Between Impossibility of Faster-Than-Light Quantum Communication and Distinction of Ensembles with the Same Density Matrix
faster-than-light communication distinction of ensembles density matrix
2007/8/15
2005Vol.44No.4pp.622-624DOI:
No-relationship Between Impossibility of Faster-Than-Light Quantum Communication and Distinction of Ensembles with the Same Density Matrix
WANG Chuan,...