Journal article
Dicke-type phase transition in a spin-orbit-coupled Bose-Einstein condensate
Nature communications, Vol.5(1), pp.4023-4023
06/04/2014
Handle:
https://hdl.handle.net/2376/108208
PMID: 24895055
Abstract
Spin-orbit-coupled Bose-Einstein condensates (BECs) provide a powerful tool to investigate interesting gauge field-related phenomena. Here we study the ground state properties of such a system and show that it can be mapped to the well-known Dicke model in quantum optics, which describes the interactions between an ensemble of atoms and an optical field. A central prediction of the Dicke model is a quantum phase transition between a superradiant phase and a normal phase. We detect this transition in a spin-orbit-coupled BEC by measuring various physical quantities across the phase transition. These quantities include the spin polarization, the relative occupation of the nearly degenerate single-particle states, the quantity analogous to the photon field occupation and the period of a collective oscillation (quadrupole mode). The applicability of the Dicke model to spin-orbit-coupled BECs may lead to interesting applications in quantum optics and quantum information science.
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Details
- Title
- Dicke-type phase transition in a spin-orbit-coupled Bose-Einstein condensate
- Creators
- Chris Hamner - Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164, USAChunlei Qu - Department of Physics, The University of Texas at Dallas, Richardson, Texas 75080, USAYongping Zhang - 1] Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164, USA Quantum System Unit, Okinawa Institute of Science and Technology, Okinawa 904-0495, JapanJiaJia Chang - Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164, USAMing Gong - 1] Department of Physics, The University of Texas at Dallas, Richardson, Texas 75080, USA Department of Physics and Center of Coherence, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, ChinaChuanwei Zhang - 1] Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164, USA Department of Physics, The University of Texas at Dallas, Richardson, Texas 75080, USAPeter Engels - Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164, USA
- Publication Details
- Nature communications, Vol.5(1), pp.4023-4023
- Academic Unit
- Physics and Astronomy, Department of
- Publisher
- England
- Identifiers
- 99900547694401842
- Language
- English
- Resource Type
- Journal article