Quantum Heating of a Nonlinear Resonator Probed by a Superconducting Qubit

F.R. Ong (1, 2) , M. Boissonneault (3) , A.C. Doherty (4) , A Blais (3) , P C Bertet (2) , F. Mallet (5) , Denis Vion (2) , D. Estève (2)

1 IQC - Institute for Quantum Computing [Waterloo]
2 QUANTRONICS - Quantronics Group
3 UdeS - Université de Sherbrooke
4 UNSW - School of Physics [UNSW Sydney]
5 LPA - Laboratoire Pierre Aigrain

We measure the quantum fluctuations of a pumped nonlinear resonator, using a superconducting artificial atom as an in-situ probe. The qubit excitation spectrum gives access to the frequency and temperature of the intracavity field fluctuations. These are found to be in agreement with theoretical predictions; in particular we experimentally observe the phenomenon of quantum heating.

Domains: Physics [physics]

F.R. Ong, M. Boissonneault, A.C. Doherty, A Blais, P C Bertet, et al.. Quantum Heating of a Nonlinear Resonator Probed by a Superconducting Qubit. Physical Review Letters, 2013, 110, pp.047001. ⟨10.1103/PhysRevLett.110.047001⟩. ⟨cea-01477717⟩