Max-Planck-Institut für Quantenoptik, Garching, Germany.
Phys Rev Lett. 2012 Feb 10;108(6):065302. doi: 10.1103/PhysRevLett.108.065302.
We propose a method to probe time-dependent correlations of nontrivial observables in many-body ultracold lattice gases. The scheme uses a quantum nondemolition matter-light interface, first to map the observable of interest on the many-body system into the light and then to store coherently such information into an external system acting as a quantum memory. Correlations of the observable at two (or more) instances of time are retrieved with a single final measurement that includes the readout of the quantum memory. Such a method brings to reach the study of dynamics of many-body systems in and out of equilibrium by means of quantum memories in the field of quantum simulators.
我们提出了一种探测多体超冷格子气体中非平凡可观测量的时变关联的方法。该方案使用量子无损物质-光接口，首先将感兴趣的可观测量映射到多体系统上，然后将相干信息存储到充当量子存储器的外部系统中。通过单次最终测量，可以提取两个（或更多）时间点的可观测量的关联，其中包括量子存储器的读出。这种方法通过量子模拟器中的量子存储器，实现了对平衡和非平衡多体系统动力学的研究。
