標題: Phase diagram of microcavity polariton condensates with a harmonic potential trap
作者: Chen, Ting-Wei
Wei, Ming-Dar
Cheng, Szu-Cheng
Hsieh, Wen-Feng
光電工程學系
Department of Photonics
關鍵字: Polariton condensates;Quantized vortices
公開日期: 1-Jan-2014
摘要: We theoretically explore the phase transition in inhomogeneous exciton-polariton condensates with variable pumping conditions. Through Bogoliubov excitations to the radial-symmetric solutions of complex Gross-Pitaevskii equation, we determine not only the bifurcation of stable and unstable modes by the sign of fluid compressibility but also two distinct stable modes which are characterized by the elementary excitations and the stability of singly quantized vortex. One state is the quasi-condensate BKT phase with Goldstone flat dispersion; the other state is the localized-BEG phase which exhibits linear-type dispersion and has an excitation energy gap at zero momentum. (C) 2013 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.ssc.2013.09.035
http://hdl.handle.net/11536/23861
ISSN: 0038-1098
DOI: 10.1016/j.ssc.2013.09.035
期刊: SOLID STATE COMMUNICATIONS
Volume: 178
Issue: 
起始頁: 23
結束頁: 27
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