CI-Energy Expressions in Terms of the Reduced Density Matrix Elements of a General Reference

1981 ◽  
pp. 332-344 ◽  
Author(s):  
Juergen Hinze ◽  
John T. Broad
Keyword(s):  
Density Matrix ◽  
Reduced Density Matrix ◽  
Matrix Elements ◽  
General Reference ◽  
Reduced Density

scholarly journals Exact Density Matrix Elements for a Driven Dissipative Bosonic Mode in a Kerr-Like Medium

2021 ◽  
Author(s):  
Sh. Saedi ◽  
F. Kheirandish
Keyword(s):  
Density Matrix ◽  
Generating Function ◽  
Reduced Density Matrix ◽  
Characteristic Functions ◽  
Matrix Elements ◽  
Operator Calculus ◽  
Exact Density ◽  
Heisenberg Equations ◽  
Reduced Density ◽  
Exact Matrix

Abstract For a prototype Hamiltonian describing a driven, dissipative bosonic mode in a Kerr-like medium, the exact matrix elements of the reduced density matrix are obtained from a generating function in terms of the normal characteristic functions. The approach is based on the Heisenberg equations and operator calculus. The special and limiting cases are discussed.

Density matrix and purity evolution in dissipative two-level systems: II. Relaxation

2021 ◽  
Author(s):  
Sambarta Chatterjee ◽  
Nancy Makri
Keyword(s):  
Density Matrix ◽  
Time Evolution ◽  
Reduced Density Matrix ◽  
Level System ◽  
Two Level Systems ◽  
Reduced Density ◽  
Harmonic Bath

We investigate the time evolution of the reduced density matrix (RDM) and its purity in the dynamics of a two-level system coupled to a dissipative harmonic bath, when the system is initially placed in one of its eigenstates.

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