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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…
High-gain weakly nonlinear flux-modulated Josephson parametric amplifier using a SQUID-array
X. Zhou, V. Schmitt, P. Bertet +4
We have developed and measured a high-gain quantum-limited microwave parametric amplifier based on a superconducting lumped LC resonator with the inductor L including an array of 8…
Characterization of a two-transmon processor with individual single-shot qubit readout
A. Dewes, F. R. Ong, V. Schmitt +5
We report the characterization of a two-qubit processor implemented with two capacitively coupled tunable superconducting qubits of the transmon type, each qubit having its own non…
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…
Strong Coupling of a Spin Ensemble to a Superconducting Resonator
Y. Kubo, F. R. Ong, P. Bertet +11
We report the realization of a quantum circuit in which an ensemble of electronic spins is coupled to a frequency tunable superconducting resonator. The spins are Nitrogen-Vacancy…
Bloch Oscillations in a Josephson Circuit
N. Boulant, G. Ithier, F. Nguyen +5
Bloch oscillations predicted to occur in current-biased single Josephson junctions have eluded direct observation up to now. Here, we demonstrate similar Bloch oscillations in a sl…