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arXiv 2008.08268quant-phcond-mat.mes-hall
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与光子数相关的有效兰姆位移

Photon-number-dependent effective Lamb shift

Arto Viitanen, Matti Silveri, Máté Jenei, Vasilii Sevriuk, Kuan Yen Tan, Matti Partanen, Jan Goetz, Leif Grönberg, Vasilii Vadimov, Valtteri Lahtinen, Mikko Möttönen

摘要:

兰姆位移是由电磁真空的存在引起的能量位移,已经在各种量子系统中观察到,并被确定为与环境光子数无关的能量位移的一部分。然而,典型的研究是基于简单的玻色子模型,这在实际的量子器件中可能会受到挑战。我们证明了一个混合玻色-费米子环境的线性谐振腔模式,并观察到,在环境中的光子数可以显着增加的耗散和有效的兰姆位移的模式。我们的观察结果定量描述的第一性原理模型,我们在这里也指导未来的量子技术应用的设备设计。这里展示的设备可以作为一个完全射频操作的量子电路冰箱来快速重置超导量子比特。

英文摘要:

The Lamb shift, an energy shift arising from the presence of the electromagnetic vacuum, has been observed in various quantum systems and established as the part of the energy shift independent of the environmental photon number. However, typical studies are based on simplistic bosonic models which may be challenged in practical quantum devices. We demonstrate a hybrid bosonic-fermionic environment for a linear resonator mode and observe that the photon number in the environment can dramatically increase both the dissipation and the effective Lamb shift of the mode. Our observations are quantitatively described by a first-principles model which we develop here also to guide device design for future quantum-technological applications. The device demonstrated here can be utilized as a fully rf-operated quantum-circuit refrigerator to quickly reset superconducting qubits.

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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