September 2010
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Day September 22, 2010

Spontaneous Parity–Time Symmetry Breaking and Stability of Solitons in Bose-Einstein Condensates

Zhenya Yan, Bo Xiong, Wu-Ming Liu

We report explicitly a novel family of exact PT-symmetric solitons and further study their spontaneous PT symmetry breaking, stabilities and collisions in Bose-Einstein condensates trapped in a PT-symmetric harmonic trap and a Hermite-Gaussian gain/loss potential. We observe the significant effects of mean-field interaction by modifying the threshold point of spontaneous PT symmetry breaking in Bose-Einstein condensates. Our scenario provides a promising approach to study PT-related universal behaviors in non-Hermitian quantum system based on the manipulation of gain/loss potential in Bose-Einstein condensates.

http://arxiv.org/abs/1009.4023
Quantum Gases (cond-mat.quant-gas)