Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths

In the presence of strong dephasing noise the dynamics of Rydberg gases becomes effectively classical, due to the rapid decay of quantum superpositions between atomic levels. Recently a great deal of attention has been devoted to the stochastic dynamics that emerges in that limit, revealing several...

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Main Authors:	Levi, Emanuele, Gutierrez, Ricardo, Lesanovsky, Igor
Format:	Article
Language:	English
Published:	Institute of Physics 2016
Online Access:	http://eprints.nottingham.ac.uk/36330/ http://eprints.nottingham.ac.uk/36330/ http://eprints.nottingham.ac.uk/36330/ http://eprints.nottingham.ac.uk/36330/1/DissRydArxiv.pdf

id	nottingham-36330
recordtype	eprints
spelling	nottingham-363302017-10-18T17:38:38Z http://eprints.nottingham.ac.uk/36330/ Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths Levi, Emanuele Gutierrez, Ricardo Lesanovsky, Igor In the presence of strong dephasing noise the dynamics of Rydberg gases becomes effectively classical, due to the rapid decay of quantum superpositions between atomic levels. Recently a great deal of attention has been devoted to the stochastic dynamics that emerges in that limit, revealing several interesting features, including kinetically constrained glassy behaviour, self-similarity and aggregation effects. However, the non-equilibrium physics of these systems, in particular in the regime where coherent and dissipative processes contribute on equal footing, is yet far from being understood. To explore this we study the dynamics of a small one-dimensional Rydberg lattice gas subject to dephasing noise by numerically integrating the quantum master equation. We interpolate between the coherent and the strongly dephased regime by defining a generalised concept of a blockade length. We find indications that the main features observed in the strongly dissipative limit persist when the dissipation is not strong enough to annihilate quantum coherences at the dynamically relevant time scales. These features include the existence of a time-dependent Rydberg blockade radius, and a growth of the density of excitations which is compatible with the power-law behaviour expected in the classical limit. Institute of Physics 2016-09-05 Article PeerReviewed application/pdf en http://eprints.nottingham.ac.uk/36330/1/DissRydArxiv.pdf Levi, Emanuele and Gutierrez, Ricardo and Lesanovsky, Igor (2016) Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths. Journal of Physics B: Atomic, Molecular and Optical Physics, 49 (18). 184003/1-184003/8. ISSN 1361-6455 http://iopscience.iop.org/article/10.1088/0953-4075/49/18/184003/meta doi:10.1088/0953-4075/49/18/184003 doi:10.1088/0953-4075/49/18/184003
repository_type	Digital Repository
institution_category	Local University
institution	University of Nottingham Malaysia Campus
building	Nottingham Research Data Repository
collection	Online Access
language	English
description	In the presence of strong dephasing noise the dynamics of Rydberg gases becomes effectively classical, due to the rapid decay of quantum superpositions between atomic levels. Recently a great deal of attention has been devoted to the stochastic dynamics that emerges in that limit, revealing several interesting features, including kinetically constrained glassy behaviour, self-similarity and aggregation effects. However, the non-equilibrium physics of these systems, in particular in the regime where coherent and dissipative processes contribute on equal footing, is yet far from being understood. To explore this we study the dynamics of a small one-dimensional Rydberg lattice gas subject to dephasing noise by numerically integrating the quantum master equation. We interpolate between the coherent and the strongly dephased regime by defining a generalised concept of a blockade length. We find indications that the main features observed in the strongly dissipative limit persist when the dissipation is not strong enough to annihilate quantum coherences at the dynamically relevant time scales. These features include the existence of a time-dependent Rydberg blockade radius, and a growth of the density of excitations which is compatible with the power-law behaviour expected in the classical limit.
format	Article
author	Levi, Emanuele Gutierrez, Ricardo Lesanovsky, Igor
spellingShingle	Levi, Emanuele Gutierrez, Ricardo Lesanovsky, Igor Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths
author_facet	Levi, Emanuele Gutierrez, Ricardo Lesanovsky, Igor
author_sort	Levi, Emanuele
title	Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths
title_short	Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths
title_full	Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths
title_fullStr	Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths
title_full_unstemmed	Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths
title_sort	quantum non-equilibrium dynamics of rydberg gases in the presence of dephasing noise of different strengths
publisher	Institute of Physics
publishDate	2016
url	http://eprints.nottingham.ac.uk/36330/ http://eprints.nottingham.ac.uk/36330/ http://eprints.nottingham.ac.uk/36330/ http://eprints.nottingham.ac.uk/36330/1/DissRydArxiv.pdf
first_indexed	2018-09-06T12:41:25Z
last_indexed	2018-09-06T12:41:25Z
_version_	1610861966933360640

Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths

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