Entanglement dynamics for the double Tavis-Cummings model

Details Entanglement dynamics for the double Tavis-Cummings model Entanglement dynamics for the double Tavis-Cummings model

2009-02-14

arxiv.org/abs/0902.2421v1

Physics

Quantum Physics

11 figures

Scientific paper

10.1140/epjd/e2009-00095-7

A double Tavis-Cummings model (DTCM) is developed to simulate the entanglement dynamics of realistic quantum information processing where two entangled atom-pairs $AB$ and $CD$ are distributed in such a way that atoms $AC$ are embedded in a cavity $a$ while $BD$ are located in another remote cavity $b$. The evolutions of different types of initially shared entanglement of atoms are studied under various initial states of cavity fields. The results obtained in the DTCM are compared with that obtained in the double Jaynes-Cummings model (DJCM) [J. Phys. B \textbf{40}, S45 (2007)] and an interaction strength theory is proposed to explain the parameter domain in which the so-called entanglement sudden death occurs for both the DTCM and DJCM.

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