Steady-state phases and tunneling-induced instabilities in the driven dissipative Bose-Hubbard model.
Steady-state phases and tunneling-induced instabilities in the driven dissipative Bose-Hubbard model.
复制标题
DOI：
10.1103/physrevlett.110.233601
复制
发表时间：
2012-12
影响因子：
8.6
通讯作者：
A. Le Boité;G. Orso;C. Ciuti
中科院分区：
文献类型：
--
作者：
A. Le Boité;G. Orso;C. Ciuti
我们确定了一个驱动耗散玻色-哈伯德模型的稳态相，描述，例如，具有有限光子寿命的相干泵浦非线性腔阵列。在一个平均场主方程的方法，使用精确的量子解的一个网站的问题，我们表明，该系统表现出隧道诱导的过渡之间的单稳态和双稳态阶段。我们描述了相应的量子相关性，突出了平衡情况下的本质区别。我们还发现集体激发与一个单位的能量-动量色散在整个布里渊区，触发调制不稳定性在特定的波矢量。
We determine the steady-state phases of a driven-dissipative Bose-Hubbard model, describing, e.g., an array of coherently pumped nonlinear cavities with a finite photon lifetime. Within a mean-field master equation approach using exact quantum solutions for the one-site problem, we show that the system exhibits a tunneling-induced transition between monostable and bistable phases. We characterize the corresponding quantum correlations, highlighting the essential differences with respect to the equilibrium case. We also find collective excitations with a flat energy-momentum dispersion over the entire Brillouin zone that trigger modulational instabilities at specific wave vectors.