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arXiv 1709.02165quant-phcond-mat.mes-hallcond-mat.quant-gas
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驱动非线性腔阵列中局域到离域的转变

Localization to delocalization transition in a driven nonlinear cavity array

Oliver T. Brown, Michael J. Hartmann

摘要:

我们研究了非线性腔阵列,其中每个腔中的粒子弛豫率随激发数的增加而增加。我们表明,相干参数输入可以驱动这样的阵列成状态的相称填充,形成非平衡类似物的莫特绝缘状态。我们探讨了莫特绝缘相的边界和过渡到一个离域相自发一阶相干。虽然与平衡态下的莫特绝缘体到超流的相变有许多相似之处,但我们发现的相图也有明显的不同。特别是非对角顺序不会成为长程,因为退相过程的影响随着隧穿速率的增加而增加。

英文摘要:

We study nonlinear cavity arrays where the particle relaxation rate in each cavity increases with the excitation number. We show that coherent parametric inputs can drive such arrays into states with commensurate filling that form non-equilibrium analogs of Mott insulating states. We explore the boundaries of the Mott insulating phase and the transition to a delocalized phase with spontaneous first order coherence. While sharing many similarities with the Mott insulator to superfluid transition in equilibrium, the phase-diagrams we find also show marked differences. Particularly the off diagonal order does not become long range since the influence of dephasing processes increases with increasing tunneling rates.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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