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Absence of a dissipative quantum phase transition in Josephson junctions: Theory
Carles Altimiras, Daniel Esteve, Çağlar Girit +2
We investigate the resistively shunted Josephson junction (RSJ) at equilibrium, using linear response, an exact path integral technique and symmetry considerations. All three appro…
Emission of photon multiplets by a dc-biased superconducting circuit
G. C. Ménard, A. Peugeot, C. Padurariu +12
We observe the emission of bunches of photons by a circuit made of a microwave resonator in series with a voltage-biased tunable Josephson junction. The bunches are…
Microscopic charged fluctuators as a limit to the coherence of disordered superconductor devices
Hélène le Sueur, Artis Svilans, Nicolas Bourlet +4
By performing experiments with thin-film resonators of NbSi, we elucidate a decoherence mechanism at work in disordered superconductors. This decoherence is caused by charged Two L…
Self-consistent dynamics of a Josephson junction in presence of an arbitrary environment
Philippe Joyez
We derive microscopically the dynamics associated with the d.c. Josephson effect in a superconducting tunnel junction interacting with an arbitrary electromagnetic environment. To…
The Bright Side of Coulomb Blockade
Max Hofheinz, Fabien Portier, Quentin Baudouin +5
We explore the photonic (bright) side of dynamical Coulomb blockade (DCB) by measuring the radiation emitted by a dc voltage-biased Josephson junction embedded in a microwave reson…
Decoherence in a superconducting quantum bit circuit
G. Ithier, E. Collin, P. Joyez +8
Decoherence in quantum bit circuits is presently a major limitation to their use for quantum computing purposes. We present experiments, inspired from NMR, that characterise decohe…