Tunable thermal entanglement in an effective spin-star system using coupled microcavities
Yang Wan-Li(杨万里)a)b), Wei Hua(魏华)a)b), Feng Mang(冯芒)a)†, and An Jun-Hong(安钧鸿)c)d)
a State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China; b Graduate School of the Chinese Academy of Sciences, Bejing 100049, China; c Department of Modern Physics, Lanzhou University, Lanzhou 730000, China; d Department of Physics, National University of Singapore, 2 Science Drive 3, 117542, Singapore
Abstract We theoretically explore the possibility of realizing controllable thermal entanglement of effective spins in a four-qubit anisotropic Heisenberg XXZ coupling spin-star system constructed by coupled microcavities. We analyse the dependence of thermal entanglement in this system on temperature, inhomogeneity of the magnetic field, and anisotropy, which can be readily tuned via the external laser fields. The peculiar characteristic and the full controllability of the thermal entanglement are demonstrated to be useful for quantum information processing.
Received: 17 November 2008
Revised: 03 December 2008
Accepted manuscript online:
(Quantized spin models, including quantum spin frustration)
Fund: Project supported by National
Natural Science Foundation of China (Grant Nos 10774163, 10774042
and 10604025), and the National Fundamental Research Program of
China (Grants Nos 2005CB724502 and
2006CB921203).
Cite this article:
Yang Wan-Li(杨万里), Wei Hua(魏华), Feng Mang(冯芒), and An Jun-Hong(安钧鸿) Tunable thermal entanglement in an effective spin-star system using coupled microcavities 2009 Chin. Phys. B 18 3677
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
