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

Elliott, Matthew and Ginossar, Eran (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 :	Name Email ORCID Elliott, Matthew m.j.elliott@surrey.ac.uk Ginossar, Eran e.ginossar@surrey.ac.uk
Date :	15 July 2015
DOI :	10.1103/PhysRevA.92.013826
Copyright Disclaimer :	Copyright 2015 American Physical Society
Depositing User :	Symplectic Elements
Date Deposited :	11 Aug 2015 08:16
Last Modified :	16 Jan 2019 16:58
URI:	http://epubs.surrey.ac.uk/id/eprint/808293

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