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Relationship of Quantum Entanglement to Density Functional Theory
A. K. Rajagopal, R. W. Rendell
The maximum von Neumann entropy principle subject to given constraints of mean values of some physical observables determines the density matrix. Similarly the stationary action pr…
Structure of the Phase in Pure Two-Mode Gaussian States
R. W. Rendell, A. K. Rajagopal
The two-mode relative phase associated with Gaussian states plays an important role in quantum information processes in optical, atomic and electronic systems. In this work, the or…
Classical Statistics Inherent in a Quantum Density Matrix
A. K. Rajagopal, R. W. Rendell
A density matrix formulation of classical bipartite correlations is constructed. This leads to an understanding of the appearance of classical statistical correlations intertwined…
Entanglement of Pure Two-Mode Gaussian States
R. W. Rendell, A. K. Rajagopal
The entanglement of general pure Gaussian two-mode states is examined in terms of the coefficients of the quadrature components of the wavefunction. The entanglement criterion and…