准能态的探测光谱
Probe spectroscopy of quasienergy states
摘要：
目前的量子比特技术，特别是约瑟夫森量子比特，允许对离散能级进行前所未有的控制。这激发了对旧的泵浦探测问题的新研究，其中离散量子系统由强驱动驱动，同时由较弱的驱动探测。强驱动包括Floquet方法和由此产生的准能态，然后研究与探针。我们研究了一个量子位，其中谐波驱动具有相对于量子位的静力平衡状态的显著纵向分量。分析和数值方法被用来解决这个问题。我们目前的计算与现实的参数，并比较结果与最近的实验结果。简要介绍了Floquet方法和探针吸收。
英文摘要：
The present qubit technology, in particular in Josephson qubits, allows an unprecedented control of discrete energy levels. This motivates a new study of the old pump-probe problem, where a discrete quantum system is driven by a strong drive and simultaneously probed by a weaker one. The strong drive is included by the Floquet method and the resulting quasienergy states are then studied with the probe. We study a qubit where the harmonic drive has a significant longitudinal component relative to the static equilibrium state of the qubit. Both analytical and numerical methods are used to solve the problem. We present calculations with realistic parameters and compare the results with recent experimental results. A short introduction to the Floquet method and the probe absorption is given.
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