Entanglement generated by dissipation and steady state entanglement of two macroscopic objects

Hanna Krauter; C.A. Muschik; Kasper Jensen; Wojciech Wasilewski; Jonas Meyer Petersen; J.I Cirac; Eugene Simon Polzik

doi:10.1103/PhysRevLett.107.080503

Entanglement generated by dissipation and steady state entanglement of two macroscopic objects

Hanna Krauter, C.A. Muschik, Kasper Jensen, Wojciech Wasilewski, Jonas Meyer Petersen, J.I Cirac, Eugene Simon Polzik

371 Citationer (Scopus)

Abstract

Entanglement is a striking feature of quantum mechanics and an essential ingredient in most applications in quantum information. Typically, coupling of a system to an environment inhibits entanglement, particularly in macroscopic systems. Here we report on an experiment where dissipation continuously generates entanglement between two macroscopic objects. This is achieved by engineering the dissipation using laser and magnetic fields, and leads to robust event-ready entanglement maintained for 0.04 s at room temperature. Our system consists of two ensembles containing about 1012 atoms and separated by 0.5 m coupled to the environment composed of the vacuum modes of the electromagnetic field. By combining the dissipative mechanism with a continuous measurement, steady state entanglement is continuously generated and observed for up to 1 h.

Originalsprog	Engelsk
Tidsskrift	Physical Review Letters
Vol/bind	107
Udgave nummer	8
Sider (fra-til)	080503
Antal sider	5
ISSN	0031-9007
DOI	https://doi.org/10.1103/PhysRevLett.107.080503
Status	Udgivet - 17 aug. 2011

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10.1103/PhysRevLett.107.080503

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AU - Jensen, Kasper

AU - Wasilewski, Wojciech

AU - Petersen, Jonas Meyer

AU - Cirac, J.I

AU - Polzik, Eugene Simon

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AB - Entanglement is a striking feature of quantum mechanics and an essential ingredient in most applications in quantum information. Typically, coupling of a system to an environment inhibits entanglement, particularly in macroscopic systems. Here we report on an experiment where dissipation continuously generates entanglement between two macroscopic objects. This is achieved by engineering the dissipation using laser and magnetic fields, and leads to robust event-ready entanglement maintained for 0.04 s at room temperature. Our system consists of two ensembles containing about 1012 atoms and separated by 0.5 m coupled to the environment composed of the vacuum modes of the electromagnetic field. By combining the dissipative mechanism with a continuous measurement, steady state entanglement is continuously generated and observed for up to 1 h.

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Entanglement generated by dissipation and steady state entanglement of two macroscopic objects

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