Evolution of entanglement between qubits ultra-strongly coupling to a quantum oscillator

doi:10.1088/1674-1056/23/9/094204

Abstract We investigate the dynamics of two qubits coupled with a quantum oscillator by using the adiabatic approximation method. We take account of the interaction between the qubits and show how the entanglement is affected by the interaction parameter. The most interesting result is that we can prolong the entanglement time or improve the entanglement degree by using an appropriate interaction parameter. As the generation and preservation of entanglement of qubits are crucial for quantum information processing, our research will be useful.

Keywords: Jaynes-Cummings model ultra-strong coupling adiabatic approximation

Received: 17 December 2013
Revised: 02 March 2014
Accepted manuscript online:

PACS:	42.50.Md	(Optical transient phenomena: quantum beats, photon echo, free-induction decay, dephasings and revivals, optical nutation, and self-induced transparency)
	03.65.Ud	(Entanglement and quantum nonlocality)
	42.50.Pq	(Cavity quantum electrodynamics; micromasers)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10875018 and 60578043).

Corresponding Authors: Tian Gui-Hua
E-mail: hua2007@126.com

Cite this article:

Ma Yue (马悦), Dong Kun (董锟), Tian Gui-Hua (田贵花) Evolution of entanglement between qubits ultra-strongly coupling to a quantum oscillator 2014 Chin. Phys. B 23 094204

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Evolution of entanglement between qubits ultra-strongly coupling to a quantum oscillator

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