论文标题
在腔中钉住值
Cloaking a qubit in a cavity
论文作者
论文摘要
空腔量子电动力学（QED）使用腔体来设计真空电磁场的模式结构，例如增强光与物质之间的相互作用。在固态系统中利用这些想法已导致电路QED，它已成为探索量子光学量丰富的物理和量子计算平台的宝贵工具。在这里，我们介绍了一种简单的方法，通过可控制地将量子与腔体的光子种群脱钩，从而有效地将量子悬挂在腔体中，从而进一步设计了驱动腔中的光线相互作用。这是通过用量身定制的，用于破坏性干扰腔场的外音，从而实现这一点，从而使量子与似乎处于真空状态的腔体相互作用。我们的实验表明，如何利用量子套来取消AC塑形的偏移和测量引起的dephasing，并加速量子读数。
Cavity quantum electrodynamics (QED) uses a cavity to engineer the mode structure of the vacuum electromagnetic field such as to enhance the interaction between light and matter. Exploiting these ideas in solid-state systems has lead to circuit QED which has emerged as a valuable tool to explore the rich physics of quantum optics and as a platform for quantum computation. Here we introduce a simple approach to further engineer the light-matter interaction in a driven cavity by controllably decoupling a qubit from the cavity's photon population, effectively cloaking the qubit from the cavity. This is realized by driving the qubit with an external tone tailored to destructively interfere with the cavity field, leaving the qubit to interact with a cavity which appears to be in the vacuum state. Our experiment demonstrates how qubit cloaking can be exploited to cancel ac-Stark shift and measurement-induced dephasing, and to accelerate qubit readout.
