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arXiv 2408.07002cond-mat.quant-gasphysics.atom-phquant-ph
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隧耦合凝聚体的量子极限广义测量

Quantum-limited generalized measurement for tunnel-coupled condensates

Maximilian Prüfer, Yuri Minoguchi, Tiantian Zhang, Yevhenii Kuriatnikov, Venkat Marupaka, Jörg Schmiedmayer

AI总结:

本文提出一种基于原子受控出耦的广义测量方案,在隧耦合1D Bose气体系统中同时获取数差和相对相位,实现量子极限测量并跟踪Josephson振荡,为研究多时关联函数和连续监测下的空间扩展系统奠定基础。

摘要:

相关信息的有效读出对于量子模拟实验至关重要。通常,通过执行标准投影测量只能获取单个可观测量。在本研究中,我们实现了一种基于原子受控出耦的广义测量方案。这使我们能够在一个由两个隧耦合 1D Bose 气体组成的系统中同时获取数差和相对相位,该系统实现了 sine-Gordon 场论的量子模拟器。我们通过获取数压缩证明了我们的测量是量子极限的,并表明我们可以用广义测量跟踪 Josephson 振荡动力学。最后,我们展示了该方案允许在保持系统相干动力学的同时提取原子,这为获取多时关联函数打开了大门。我们的方案向获取 sine-Gordon 场论的量子性质迈出了一步,并在未来有望研究连续监测下的空间扩展系统。

英文摘要:

The efficient readout of the relevant information is pivotal for quantum simulation experiments. Often only single observables are accessed by performing standard projective measurements. In this work, we implement a generalized measurement scheme based on controlled outcoupling of atoms. This gives us simultaneous access to number imbalance and relative phase in a system of two tunnel-coupled 1D Bose gases, which realize a quantum simulator of the sine-Gordon field theory. We demonstrate that our measurement is quantum limited by accessing number squeezing and show that we can track Josephson oscillation dynamics with the generalized measurements. Finally, we show that the scheme allows the extraction of atoms while maintaining the system's coherent dynamics, which opens up the door to accessing multi-time correlation functions. Our scheme constitutes a step towards accessing quantum properties of the sine-Gordon field theory and, in the future, studying spatially extended systems under continuous monitoring.

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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