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Suppressing relaxation in superconducting qubits by quasiparticle pumping
Simon Gustavsson, Fei Yan, Gianluigi Catelani +15
Dynamical error suppression techniques are commonly used to improve coherence in quantum systems. They reduce dephasing errors by applying control pulses designed to reverse errone…
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…
Single-photon-driven high-order sideband transitions in an ultrastrongly coupled circuit quantum electrodynamics system
Zhen Chen, Yimin Wang, Tiefu Li +8
We report the experimental observation of high-order sideband transitions at the single-photon level in a quantum circuit system of a flux qubit ultrastrongly coupled to a coplanar…
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…