Investigation of nonlinear effects in Josephson parametric oscillators used in circuit quantum electrodynamics
Artikel i vetenskaplig tidskrift, 2013
We experimentally study the behavior of a parametrically pumped nonlinear oscillator, which is based on a superconducting quarter wavelength resonator, and is terminated by a flux-tunable superconducting quantum interference device. We extract parameters for two devices. In particular, we study the effect of the nonlinearities in the system and compare to theory. The Duffing nonlinearity is determined from the probe-power dependent frequency shift of the oscillator, and the nonlinearity related to the parametric flux pumping, is determined from the pump amplitude for the onset of parametric oscillations. Both nonlinearities depend on the parameters of the device and can be tuned in situ by the applied dc flux. We also suggest how to cancel the effect of by adding a small dc flux and a pump tone at twice the pump frequency.
SQUID
circuit QED
parametric amplifiers
parametric oscillator
Författare
Philip Krantz
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Yarema Reshitnyk
University of Queensland
Waltraut Wustmann
Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik
Jonas Bylander
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Simon Gustavsson
Massachusetts Institute of Technology (MIT)
William Oliver
Massachusetts Institute of Technology (MIT)
MIT Lincoln Laboratory
Tim Duty
University of New South Wales (UNSW)
Vitaly Shumeiko
Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik
Per Delsing
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
New Journal of Physics
1367-2630 (ISSN)
Vol. 15 (article nr) 105002- 105002Quantum optics with microwave photons building a tool-box based on superconducting technology (QUOMP)
Europeiska kommissionen (EU) (EC/FP7/247208), 2010-03-01 -- 2015-02-28.
Styrkeområden
Nanovetenskap och nanoteknik
Ämneskategorier
Den kondenserade materiens fysik
DOI
10.1088/1367-2630/15/10/105002