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arXiv 2408.08404quant-phcond-mat.other
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超导量子电路中的受控压缩门

Controlled-squeeze gate in superconducting quantum circuits

Nicolás F. Del Grosso, Rodrigo G. Cortiñas, Paula I. Villar, Fernando C. Lombardo, Juan Pablo Paz

AI总结:

提出一种基于SQUID终端谐振腔和色散耦合量子比特的受控压缩门方法,结合高斯操作实现通用性,可将任意量子比特态映射为压缩态叠加态,用于制备具有确定超宇称的玻色编码,使光子损失可通过无损宇称测量检测,且现有电路QED技术可实现。

摘要:

我们提出了一种在微波谐振腔中制备电磁场非经典态的方法。该方法基于一个受控门,该门根据色散耦合量子比特的状态,对SQUID终端谐振腔应用压缩操作。当与谐振腔上的高斯操作结合时,这种受控压缩门具有通用性。我们探索了利用该工具将任意量子比特态映射为压缩态叠加态的方法。特别地,我们针对具有确定超宇称的玻色编码,使得光子损失能够通过无损宇称测量被检测到。我们分析了使用最先进的电路QED工具实现该方案的可能性,并得出结论:这在当前技术范围内是可实现的。

英文摘要:

We present a method to prepare non-classical states of the electromagnetic field in a microwave resonator. It is based on a controlled gate that applies a squeezing operation on a SQUID-terminated resonator conditioned on the state of a dispersively coupled qubit. This controlled-squeeze gate, when combined with Gaussian operations on the resonator, is universal. We explore the use of this tool to map an arbitrary qubit state into a superposition of squeezed states. In particular, we target a bosonic code with well-defined superparity which makes photon losses detectable by non-demolition parity measurements. We analyze the possibility of implementing this using state-of-the-art circuit QED tools and conclude that it is within reach of current technologies.

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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