Skip to Main content Skip to Navigation
Journal articles

Slowing Quantum Decoherence by Squeezing in Phase Space

Abstract : Non-Gaussian states, and specifically the paradigmatic cat state, are well known to be very sensitive to losses. When propagating through damping channels, these states quickly lose their nonclassical features and the associated negative oscillations of their Wigner function. However, by squeezing the superposition states, the decoherence process can be qualitatively changed and substantially slowed down. Here, as a first example, we experimentally observe the reduced decoherence of squeezed optical coherent-state superpositions through a lossy channel. To quantify the robustness of states, we introduce a combination of a decaying value and a rate of decay of the Wigner function negativity. This work, which uses squeezing as an ancillary Gaussian resource, opens new possibilities to protect and manipulate quantum superpositions in phase space.
Document type :
Journal articles
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-03269647
Contributor : Hanna Le Jeannic <>
Submitted on : Thursday, June 24, 2021 - 11:02:24 AM
Last modification on : Tuesday, July 13, 2021 - 3:28:05 AM

File

PhysRevLett.120.073603.pdf
Publisher files allowed on an open archive

Identifiers

Citation

H Le Jeannic, A Cavaillès, K Huang, R Filip, J Laurat. Slowing Quantum Decoherence by Squeezing in Phase Space. Physical Review Letters, American Physical Society, 2018, 120, ⟨10.1103/physrevlett.120.073603⟩. ⟨hal-03269647⟩

Share

Metrics

Record views

26

Files downloads

23