论文标题
非高斯的相关性是由纳入费米尼电线上的局部开发所印象的
Non-Gaussian correlations imprinted by local dephasing in fermionic wires
论文作者
论文摘要
我们研究了延伸的费米电线与局部随机场耦合的行为。由于量子跳跃操作员是纤维基因运算符中的Hermitian和二次操作员，因此它使模型可溶，从而研究了非平衡稳态的性质以及耗散诱导的波动的作用。我们仅针对两点相关器得出一组封闭的运动方程。另一方面，我们发现多体状态表现出非高斯相关性。密度密度相关函数表明，来自弱消散状态的交叉，其特征在于中等加热和受刺激的量子赋予由强耗散统治的量子Zeno制度的波动，该量子散发出了强烈的耗散，这会驯服量子的波动。可溶性耗散杂质的实例代表了一个实验可行的平台，可以理解多体量子系统中耗散和汉密尔顿动态之间的相互作用。
We study the behavior of an extended fermionic wire coupled to a local stochastic field. Since the quantum jump operator is Hermitian and quadratic in fermionic operators, it renders the model soluble, allowing investigation of the properties of the non-equilibrium steady-state and the role of dissipation-induced fluctuations. We derive a closed set of equations of motion solely for the two-point correlator; on the other hand, we find, surprisingly, that the many-body state exhibits non-Gaussian correlations. Density-density correlation function demonstrates a crossover from a regime of weak dissipation characterized by moderate heating and stimulated fluctuations to a quantum Zeno regime ruled by strong dissipation, which tames quantum fluctuations. Instances of soluble dissipative impurities represent an experimentally viable platform to understand the interplay between dissipation and Hamiltonian dynamics in many-body quantum systems.
