能量弛豫传感方案下声子介导超导量子比特探测器的能量阈值估算
Estimating the Energy Threshold of Phonon-mediated Superconducting Qubit Detectors Operated in an Energy-Relaxation Sensing Scheme
AI总结：
针对轻暗物质探测需求，研究人员开发基于G4CMP的模拟框架，评估能量弛豫读出方案下超导量子比特声子探测器的性能，测得其能量阈值可低至约0.4 eV。
摘要：
近年来，10 GeV/c²及以上质量尺度的WIMP（弱相互作用大质量粒子）暗物质尚未得到确凿探测，这推动了低阈值探测器技术的发展，旨在探测更轻的暗物质候选体。基于库珀对破缺传感器的探测器因大多数超导体中打破库珀对所需能量较低（meV量级），已成为该探测方向的一条有前景的路径。其中，基于超导量子比特的器件因观测到对破缺库珀对的敏感性，是颇具吸引力的传感候选方案。我们开发了一套端到端的基于G4CMP的模拟框架，并用它评估了采用门控式“能量弛豫”读出方案的量子比特基器件的性能指标，该方案与近期量子比特对电离辐射敏感性研究中使用的方案类似。我们发现，对于该读出方案，量子比特可作为声子传感器，在近期性能参数下其能量阈值可低至约0.4 eV。
英文摘要：
In recent years, the lack of a conclusive detection of WIMP dark matter at the 10 GeV/c$^{2}$ mass scale and above has encouraged development of low-threshold detector technology aimed at probing lighter dark matter candidates. Detectors based on Cooper-pair-breaking sensors have emerged as a promising avenue for this detection due to the low (meV-scale) energy required for breaking a Cooper pair in most superconductors. Among them, devices based on superconducting qubits are interesting candidates for sensing due to their observed sensitivity to broken Cooper pairs. We have developed an end-to-end G4CMP-based simulation framework and have used it to evaluate performance metrics of qubit-based devices operating in a gate-based "energy relaxation" readout scheme, akin to those used in recent studies of qubit sensitivity to ionizing radiation. We find that for this readout scheme, the qubit acts as a phonon sensor with an energy threshold ranging down to $\simeq$0.4 eV for near-term performance parameters.
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。
