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 (MC2), Kvantkomponentfysik

Yarema Reshitnyk

University of Queensland

Waltraut Wustmann

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Jonas Bylander

Chalmers, Mikroteknologi och nanovetenskap (MC2), 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 (MC2), Tillämpad kvantfysik

Per Delsing

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

New Journal of Physics

1367-2630 (ISSN)

Vol. 15 (article nr) 105002- 105002

Quantum optics with microwave photons building a tool-box based on superconducting technology (QUOMP)

Europeiska kommissionen (FP7), 2010-03-01 -- 2015-02-28.

Styrkeområden

Nanovetenskap och nanoteknik

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1088/1367-2630/15/10/105002