利用超导量子比特探测暗物质-电子相互作用
Probing Dark Matter-Electron Interactions with Superconducting Qubits
AI总结：
利用超导量子比特探测暗物质-电子相互作用，设定最严格的实验室约束条件。
摘要：
量子设备测量是探测暗物质相互作用的强大工具。其中，传输门量子比特因其能有效抑制外部噪声，同时对微小能量沉积高度敏感而脱颖而出。银河系晕暗物质与电子相互作用时，可在量子比特中沉积能量，导致其退相干时间发生变化。最近对传输门量子比特的测量在各种实验设置中 consistently 测量到退相干时间的残余贡献，这一现象无法用热噪声或已知的外部来源解释。我们利用这些测量结果，设定了迄今为止最严格的实验室基于约束，对keV尺度的暗物质-电子散射以及暗光子吸收的竞争约束。
英文摘要：
Quantum device measurements are powerful tools to probe dark matter interactions. Among these, transmon qubits stand out for their ability to suppress external noise while remaining highly sensitive to tiny energy deposits. Ambient galactic halo dark matter interacting with electrons can deposit energy in the qubit, leading to changes in its decoherence time. Recent measurements of transmons have consistently measured, in various experimental setups, a residual contribution to the decoherence time unexplained by thermal noise or known external sources. We use such measurements to set the most stringent laboratory-based constraints to date on dark matter-electron scattering at the keV scale and competitive constraints on dark photon absorption.
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