Universität zu Köln

Joshi, Chaitanya ORCID: 0000-0003-4680-2861 and Larson, Jonas (2015). Cavity-Assisted Generation of Sustainable Macroscopic Entanglement of Ultracold Gases. Atoms, 3 (3). S. 348 - 367. BASEL: MDPI. ISSN 2218-2004

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Abstract

Prospects for reaching persistent entanglement between two spatially-separated atomic Bose-Einstein condensates are outlined. The system setup comprises two condensates loaded in an optical lattice, which, in return, is confined within a high-Q optical resonator. The system is driven by an external laser that illuminates the atoms, such that photons can scatter into the cavity. In the superradiant phase, a cavity field is established, and we show that the emerging cavity-mediated interactions between the two condensates is capable of entangling them despite photon losses. This macroscopic atomic entanglement is sustained throughout the time-evolution apart from occasions of sudden deaths/births. Using an auxiliary photon mode and coupling it to a collective quadrature of the two condensates, we demonstrate that the auxiliary mode's squeezing is proportional to the atomic entanglement, and as such, it can serve as a probe field of the macroscopic entanglement.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Joshi, Chaitanya UNSPECIFIED orcid.org/0000-0003-4680-2861 UNSPECIFIED Larson, Jonas UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-393680
DOI:	10.3390/atoms3030348
Journal or Publication Title:	Atoms
Volume:	3
Number:	3
Page Range:	S. 348 - 367
Date:	2015
Publisher:	MDPI
Place of Publication:	BASEL
ISSN:	2218-2004
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CONTINUOUS-VARIABLE SYSTEMS; QUANTUM PHASE-TRANSITION; DICKE-MODEL; DYNAMICS; BIFURCATIONS; CUMMINGS Multiple languages Physics, Atomic, Molecular & Chemical Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/39368