Entanglement dynamic behavior of two driven coupled qubits. (30th November 2018)

• Record Type: Journal Article
• Authors: Cheng, Jing; Chen, Xi; Liu, Ji-Bing; Huang, Yan-Xia; Shan, Chuan-Jia
• Is Part Of: Laser physics letters. Volume 16:Number 1(2019:Jan.)
• Publication Date: 2018-11-30
• Subjects: quantum entanglement -- quantum decoherence -- noise strength; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-202X/aaf05f
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: We investigate the entanglement dynamic behavior of a system with two driven coupled qubits. The effects of the Rabi frequency ratio of nearest qubits, different initial states and different thermal boson number on quantum entanglement are addressed in detail. The results show that, whether the initial state is entangled or not, the two-qubit state will be in a stable entangled state when we select an appropriate parameter for the Rabi frequency ratio. Meanwhile, quantum sudden death and quantum sudden birth can happen in these systems. Increasing the noise strength can also put the system in a stable entanglement state. Hence steady-state entanglement can be obtained by adjusting the parameter of the Rabi frequency ratio and noise strength.