论文标题
Bose-Einstein冷凝物中弱测量诱导的加热
Weak-Measurement-Induced Heating in Bose-Einstein Condensates
论文作者
论文摘要
Ultracold Atoms是了解多体系统的系统库动力学的理想平台。在这里，我们研究了原子玻色子凝结物中的量子反作用，与远面的谐振弱相互作用，即分散相互作用，探针激光束。原子分散的光可以视为量子测量过程的一部分，因此系统状态的变化源于测量反作用。我们通过实验，根据沉积能量来量化所得的反作用。我们通过广泛的测量过程对系统和环境的相互作用进行建模，从而导致马尔可夫储层。此外，我们确定了两个系统的加热和损失来源：杂散的光学晶格和探针诱导的光辅助碰撞（一种固有的原子过程）。观察到的加热和损失率对于蓝色失调而不是红色失调，在这种旋转的情况下，它们是振荡的功能，具有分子共振时损耗的增加，并且分子共振之间的损失降低。
Ultracold atoms are an ideal platform for understanding system-reservoir dynamics of many-body systems. Here, we study quantum back-action in atomic Bose-Einstein condensates, weakly interacting with a far-from resonant, i.e., dispersively interacting, probe laser beam. The light scattered by the atoms can be considered as a part of quantum measurement process whereby the change in the system state derives from measurement back-action. We experimentally quantify the resulting back-action in terms of the deposited energy. We model the interaction of the system and environment with a generalized measurement process, leading to a Markovian reservoir. Further, we identify two systematic sources of heating and loss: a stray optical lattice and probe-induced light assisted collisions (an intrinsic atomic process). The observed heating and loss rates are larger for blue detuning than for red detuning, where they are oscillatory functions of detuning with increased loss at molecular resonances and reduced loss between molecular resonances.
