Confining the state of light to a quantum manifold by engineered two-photon loss - Inria - Institut national de recherche en sciences et technologies du numérique
Journal Articles Science Year : 2015

Confining the state of light to a quantum manifold by engineered two-photon loss

Abstract

Physical systems usually exhibit quantum behavior, such as superpositions and entanglement, only when they are sufficiently decoupled from a lossy environment. Paradoxically, a specially engineered interaction with the environment can become a resource for the generation and protection of quantum states. This notion can be generalized to the confinement of a system into a manifold of quantum states, consisting of all coherent superpositions of multiple stable steady states. We have confined the state of a superconducting resonator to the quantum manifold spanned by two coherent states of opposite phases and have observed a Schrödinger cat state spontaneously squeeze out of vacuum before decaying into a classical mixture. This experiment points toward robustly encoding quantum information in multidimensional steady-state manifolds.

Dates and versions

hal-01240210 , version 1 (08-12-2015)

Identifiers

Cite

Zaki Leghtas, Steven Touzard, Ioan M. Pop, Angela Kou, Brian Vlastakis, et al.. Confining the state of light to a quantum manifold by engineered two-photon loss. Science, 2015, 347 (6224), pp.853-857 ⟨10.1126/science.aaa2085⟩. ⟨hal-01240210⟩
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