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

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Bibliographic Details
Title:	Confining the state of light to a quantum manifold by engineered two-photon loss.
Authors:	Leghtas, Z., Touzard, S., Pop, I. M., Kou, A., Vlastakis, B., Petrenko, A., Sliwa, K. M., Narla, A., Shankar, S., Hatridge, M. J., Reagor, M., Frunzio, L., Schoelkopf, R. J., Mirrahimi, M., Devoret, M. H.
Source:	Science (pre-March 2025). 2/20/2015, Vol. 347 Issue 6224, p853-857. 5p.
Subjects:	Photons, Quantum states, Superposition principle (Physics), Superconducting resonators, Steady state conduction, Schrödinger equation, Quantum information theory
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. [ABSTRACT FROM AUTHOR]
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Database:	Psychology and Behavioral Sciences Collection

Description
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. [ABSTRACT FROM AUTHOR]
ISSN:	00368075
DOI:	10.1126/science.aaa2085