Universität zu Köln

Buchhold, Michael ORCID: 0000-0001-5194-9388, Everest, Benjamin, Marcuzzi, Matteo ORCID: 0000-0001-7342-2595, Lesanovsky, Igor ORCID: 0000-0001-9660-9467 and Diehl, Sebastian (2017). Nonequilibrium effective field theory for absorbing state phase transitions in driven open quantum spin systems. Phys. Rev. B, 95 (1). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

Phase transitions to absorbing states are among the simplest examples of critical phenomena out of equilibrium. The characteristic feature of these models is the presence of a fluctuationless configuration which the dynamics cannot leave, which has proved a rather stringent requirement in experiments. Recently, a proposal to seek such transitions in highly tunable systems of cold-atomic gases offers to probe this physics and, at the same time, to investigate the robustness of these transitions to quantum coherent effects. Here, we specifically focus on the interplay between classical and quantum fluctuations in a simple driven open quantum model which, in the classical limit, reproduces a contact process, which is known to undergo a continuous transition in the directed percolation universality class. We derive an effective long-wavelength field theory for the present class of open spin systems and show that, due to quantum fluctuations, the nature of the transition changes from second to first order, passing through a bicritical point which appears to belong instead to the tricritical directed percolation class.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Buchhold, Michael UNSPECIFIED orcid.org/0000-0001-5194-9388 UNSPECIFIED Everest, Benjamin UNSPECIFIED UNSPECIFIED UNSPECIFIED Marcuzzi, Matteo UNSPECIFIED orcid.org/0000-0001-7342-2595 UNSPECIFIED Lesanovsky, Igor UNSPECIFIED orcid.org/0000-0001-9660-9467 UNSPECIFIED Diehl, Sebastian UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-242179
DOI:	10.1103/PhysRevB.95.014308
Journal or Publication Title:	Phys. Rev. B
Volume:	95
Number:	1
Date:	2017
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9969
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute for Theoretical Physics
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MANY-BODY PHENOMENA; DIRECTED PERCOLATION; INFORMATION-THEORY; CRITICAL-DYNAMICS; UNIVERSALITY; LATTICE Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/24217