论文标题
Landau-Zener-Stückelberg耗散电路量子电动力学中的干涉法
Landau-Zener-Stückelberg Interferometry in dissipative Circuit Quantum Electrodynamics
论文作者
论文摘要
我们研究了在耗散作用下在CQED结构中研究Landau-Zener-Stückelberg（LZS）的干涉法。具体而言，我们考虑由DC+AC信号驱动并与传输线谐振器耦合的超导QUBIT，但我们的结果对于一般的Qubit谐振器设备有效。要考虑到环境，我们假设谐振器耦合到欧姆量子浴中。在数值上求解了Floquet-Markov Master方程，以获取系统的动力学，以进行驱动器的任意振幅和不同的时间尺度。我们揭示了QUBIT谐振器相互作用中强耦合和超强耦合方案之间的谐振模式的重要差异，这主要是由于系统能量频谱中光子差距的幅度。我们在LZS模式中识别量子间隙和光子间隙的贡献，表明对于大型驱动幅度，由于不同间隙贡献的综合互入，模式呈现出织造结构。
We study Landau-Zener-Stückelberg (LZS) interferometry in a cQED architecture under effects of dissipation. To be specific, we consider a superconducting qubit driven by a dc+ac signal and coupled to a transmission line resonator, but our results are valid for general qubit-resonators devices. To take the environment into account, we assume that the resonator is coupled to an ohmic quantum bath. The Floquet-Born-Markov master equation is numerically solved to obtain the dynamics of the system for arbitrary amplitude of the drive and different time scales. We unveil important differences in the resonant patterns between the Strong Coupling and Ultra Strong Coupling regimes in the qubit-resonator interaction, which are mainly due to the magnitude of photonic gaps in the energy spectrum of the system. We identify in the LZS patterns the contribution of the qubit gap and the photonic gaps, showing that for large driving amplitudes the patterns present a weaving structure due to the combined intercrossing of the different gaps contributions.
