Eur. Phys. J. D 53, 229-236 (2009)
https://doi.org/10.1140/epjd/e2009-00095-7

Entanglement dynamics for the double Tavis-Cummings model

¹ College of Physics and Engineering, Qufu Normal University, 273165, Qufu, P.R. China
² Institute of Physics and Electronics, 10 Dao Tan, Thu Le, Ba Dinh, Hanoi, Vietnam
³ School of Computational Sciences, Korea Institute for Advanced Study, 207-43 Cheongryangni 2-dong, Dongdaemun-gu, 130-722 Seoul, Korea

Corresponding author: ^a manzx81@hotmail.com

Received: 9 January 2009
Revised: 17 February 2009
Published online: 19 March 2009

Abstract

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) [M. Yönaç, T. Yu, J.H. Eberly, J. Phys. B 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.