暗态：一种可通过无珀塞尔极限的色散读出测量的可测状态
Dark state as a measurable state by a dispersive readout without a Purcell limit
浏览论文内容
中文总结 AI 辅助
本研究提出耦合量子系统的暗模式可通过ZZ相互作用打破量子比特-谐振器耦合增强导致色散读出优化与珀塞尔损耗增大的固有规律，其色散位移与亮态相近且无珀塞尔损耗，可实现无珀塞尔极限的色散读出测量。
中文摘要 AI 辅助
人们普遍认为，量子比特-谐振器耦合的增强可实现更优的色散读出，但会引入更大的珀塞尔损耗。本研究提出，耦合量子系统中的暗模式可通过在暗模式与亮模式之间引入ZZ相互作用打破这一规律。暗模式可表现出有效零耦合强度，与谐振器光子的珀塞尔损耗为零；但由于更高激发态引入的高阶微扰，其色散位移与亮态几乎相同。该状态在电路量子电动力学中展现出无珀塞尔极限的可测性。
英文摘要
It is believed that the enhancement in qubit-resonator coupling allows a better dispersive readout but introduces greater Purcell loss. In this work, we propose that a dark mode in a coupled quantum system may violate this rule by introducing the ZZ interaction between the dark and a bright mode. The dark mode may exhibit an effective zero coupling strength, and zero Purcell loss with the resonator photons. Nevertheless, the dispersive shift is almost the same as the bright state, due to the higher order perturbation introduced by the higher excited states. Such a state demonstrates the measurability without a Purcell limit in circuit quantum electrodynamics.
发表机构
- National Chung Hsing University（中兴大学）
- Feng Chia University（逢甲大学）
- Research Center for Critical Issues, Academia Sinica（中央研究院关键问题研究中心）
- National Changhua University of Education（国立彰化师范大学）
机构由 AI 辅助整理，请以论文原文为准。
