• mardi 7 février 2017

Séminaire Nanoélectronique Quantique : Zaki Leghtas

15h00 // Salle « Remy Lemaire » (K223)

Institut Néel
25 avenue des martyrs - Grenoble

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

Zaki Leghtas (Laboratoire Pierre Aigrain - Ecole Normale Supérieure)

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.

Contact : zaki.leghtas@lpa.ens.fr



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