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Article Dans Une Revue PRXQuantum Année : 2021

Dissipative Stabilization of Squeezing Beyond 3 dB in a Microwave Mode

Résumé

While a propagating state of light can be generated with arbitrary squeezing by pumping a parametric resonator, the intraresonator state is limited to 3 dB of squeezing. Here, we implement a reservoir-engineering method to surpass this limit using superconducting circuits. Two-tone pumping of a three-wave-mixing element implements an effective coupling to a squeezed bath, which stabilizes a squeezed state inside the resonator. Using an ancillary superconducting qubit as a probe allows us to perform a direct Wigner tomography of the intraresonator state. The raw measurement provides a lower bound on the squeezing at about 6.7±0.2 dB below the zero-point level. Further, we show how to correct for resonator evolution during the Wigner tomography and obtain a squeezing as high as 8.2±0.8 dB. Moreover, this level of squeezing is achieved with a purity of 0.91±0.09.

Dates et versions

hal-03238820 , version 1 (27-05-2021)

Identifiants

Citer

R. Dassonneville, R. Assouly, T. Peronnin, A.A. Clerk, A. Bienfait, et al.. Dissipative Stabilization of Squeezing Beyond 3 dB in a Microwave Mode. PRXQuantum, 2021, 2 (2), pp.020323. ⟨10.1103/PRXQuantum.2.020323⟩. ⟨hal-03238820⟩

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