Open AccessDYNAMICS OF TWO-LEVEL ATOMS INTERACTING WITH THERMAL FIELD FOR ENTANGLED INITIAL ATOMIC STATES
Author(s) -
Eugene K. Bashkirov,
Alevtina Solovieva,
M.S. Mastyugin
Publication year - 2015
Publication title -
vestnik samarskogo universiteta. estestvennonaučnaâ seriâ
Language(s) - English
Resource type - Journals
eISSN - 2712-8954
pISSN - 2541-7525
DOI - 10.18287/2541-7525-2015-21-6-151-160
Subject(s) - quantum entanglement , density matrix , physics , eigenvalues and eigenvectors , hamiltonian (control theory) , quantum mechanics , thermal , master equation , quantum , thermodynamics , mathematics , mathematical optimization
In this paper the entanglement dynamics for system of two two-level atoms interacting with a mode of thermal electromagnetic eld in lossless cavity has been investigated. Initial atomic states are the entangled Bell type states. Using the full set of eigenvectors of the Hamiltonian of the considered model we have derived the exact solution for the density matrix for the whole system. On its basis the reduced atomic density matrix and Peres - Horodetcki parameter have been calculated. Calculating of entanglement parameter shows the possibility of high degree of entanglement even for large intensity of thermal eld. Thus there is a possibility of maintenance and control over the degree of entanglement.