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Enhancement and state tomography of a squeezed vacuum with circuit quantum electrodynamics

Elliott, M and Ginossar, E (2015) Enhancement and state tomography of a squeezed vacuum with circuit quantum electrodynamics Physical Review A: Atomic, Molecular and Optical Physics, 92, 013826.

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Abstract

We study the dynamics of a general quartic interaction Hamiltonian under the influence of dissipation and nonclassical driving. We show that this scenario could be realized with a cascaded superconducting cavity-qubit system in the strong dispersive regime in a setup similar to recent experiments. In the presence of dissipation, we find that an effective Hartree-type decoupling with a Fokker-Planck equation yields a good approximation. We find that the stationary state is approximately a squeezed vacuum, which is enhanced by the Q factor of the cavity but conserved by the interaction. The qubit nonlinearity, therefore, does not significantly influence the highly squeezed intracavity microwave field but, for a range of realistic parameters, enables characterization of itinerant squeezed fields.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute
Authors :
AuthorsEmailORCID
Elliott, MUNSPECIFIEDUNSPECIFIED
Ginossar, EUNSPECIFIEDUNSPECIFIED
Date : 15 July 2015
Identification Number : 10.1103/PhysRevA.92.013826
Additional Information : ©2015 American Physical Society
Depositing User : Symplectic Elements
Date Deposited : 11 Aug 2015 08:16
Last Modified : 11 Aug 2015 08:16
URI: http://epubs.surrey.ac.uk/id/eprint/808293

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