Quantum phase transition in a driven Tavis-Cummings model
文献类型：期刊论文
| 作者 | Zou, J. H.1; Liu, T.1,2; Feng, M.1; Yang, W. L.1; Chen, C. Y.1,3; Twamley, J.4 |
| 刊名 | NEW JOURNAL OF PHYSICS
 |
| 出版日期 | 2013-12-19 |
| 卷号 | 15 |
| 英文摘要 | Quantum phase transitions (QPTs) describe when a many-body quantum system displays non-analytic behavior associated with a discontinuous change in a property of the ground state as a parameter is varied. The QPT in prototypical Dicke model is difficult to reach experimentally as the spin-field coupling strength must be quite large. In this work we describe a new model-the off-resonant Tavis-Cummings model where we drive the common mode, and discover a new type of QPT at quite low coupling strengths which are comparable with the geometric mean of the atomic and field detunings lambda similar to lambda(c) equivalent to root Delta(a)Delta(c). Through analytic methods we demonstrate this QPT for both finite and infinite numbers of spins and show that vertical bar < J(x)(J(z))>vertical bar/(N/2) similar to vertical bar lambda/lambda(c) - 1 vertical bar(gamma x(gamma z)) and < a(dagger)a >/N similar to vertical bar lambda/lambda(c) - 1 vertical bar(gamma a) for lambda >= lambda(c), with critical exponents gamma(x) approximate to 1/2, gamma(z) approximate to 1 and gamma(a) approximate to 1. We show that this QPT can be immediately observed by laboratory cavity-QED setups such as Bose-Einstein condensate in optical cavity and superconducting circuit-QED as well as a line of trapped ultracold ions. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Physics, Multidisciplinary |
| 研究领域[WOS] | Physics |
| 关键词[WOS] | TRAPPED IONS ; RADIATION-FIELD ; SYSTEM ; SIMULATION ; MASER |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000330367000002 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/834]  |
| 专题 | 武汉物理与数学研究所_原子分子光物理研究部 |
| 作者单位 | 1.Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China 2.Southwest Univ Sci & Technol, Sch Sci, Mianyang 621010, Peoples R China 3.Hunan Inst Humanities Sci & Technol, Dept Phys & Informat Engn, Loudi 417000, Peoples R China 4.Macquarie Univ, ARC Ctr Engn Quantum Syst, Dept Phys & Astron, N Ryde, NSW 2109, Australia |
| 推荐引用方式 GB/T 7714 | Zou, J. H.,Liu, T.,Feng, M.,et al. Quantum phase transition in a driven Tavis-Cummings model[J]. NEW JOURNAL OF PHYSICS,2013,15. |
| APA | Zou, J. H.,Liu, T.,Feng, M.,Yang, W. L.,Chen, C. Y.,&Twamley, J..(2013).Quantum phase transition in a driven Tavis-Cummings model.NEW JOURNAL OF PHYSICS,15. |
| MLA | Zou, J. H.,et al."Quantum phase transition in a driven Tavis-Cummings model".NEW JOURNAL OF PHYSICS 15(2013). |
入库方式： OAI收割
来源：武汉物理与数学研究所
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