Enhancement and state tomography of a squeezed vacuum with circuit quantum electrodynamics
arXiv:1501.01009 · doi:10.1103/PhysRevA.92.013826
Abstract
We study the dynamics of a general quartic interaction Hamiltonian under the influence of dissipation and non-classical driving. We show that this scenario could be realised 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 -factor of the cavity but conserved by the interaction. The qubit non-linearity, therefore, does not significantly influence the highly squeezed intracavity microwave field but, for a range of realistic parameters, enables characterisation of itinerant squeezed fields.
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Cited by in corpus (6)
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- Encoding a Qubit into a Cavity Mode in Circuit-QED using Phase Estimation
- Enhanced qubit readout using locally-generated squeezing and inbuilt Purcell-decay suppression
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