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Characteristic spectra of circuit quantum electrodynamics systems from the ultrastrong- to the deep-strong-coupling regime
Fumiki Yoshihara, Tomoko Fuse, Sahel Ashhab +3
We report on spectra of circuit-quantum-electrodynamics (QED) systems in an intermediate regime that lies between the ultrastrong and deep-strong-coupling regimes, which have been…
Landau-Zener transitions in an open multilevel quantum system
S. Ashhab
We consider the Landau-Zener problem for a multilevel quantum system that is coupled to an external environment. In particular, we consider a number of cases of three-level systems…
Fast Quantum Communication in Linear Networks
Kurt Jacobs, Rebing Wu, Xiaoting Wang +3
Here we consider the speed at which quantum information can be transferred between the nodes of a linear network. Because such nodes are linear oscillators, this speed is also impo…
Dynamics of a two-level system under strong driving: quantum gate optimization based on floquet theory
Chunqing Deng, Feiruo Shen, Sahel Ashhab +1
We consider the dynamics of a two-level system (qubit) driven by strong and short resonant pulses in the framework of Floquet theory. First we derive analytical expressions for the…
Superconducting qubit-oscillator circuit beyond the ultrastrong-coupling regime
Fumiki Yoshihara, Tomoko Fuse, Sahel Ashhab +3
The interaction between an atom and the electromagnetic field inside a cavity has played a crucial role in the historical development of our understanding of light-matter interacti…