Universität zu Köln

Wachtel, G., Sieberer, L. M., Diehl, S. and Altman, E. (2016). Electrodynamic duality and vortex unbinding in driven-dissipative condensates. Phys. Rev. B, 94 (10). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

We investigate the superfluid properties of two-dimensional driven Bose liquids, such as polariton condensates, using their long-wavelength description in terms of a compact Kardar-Parisi-Zhang (KPZ) equation for the phase dynamics. We account for topological defects (vortices) in the phase field through a duality mapping between the compact KPZ equation and a theory of nonlinear electrodynamics coupled to charges. Using the dual theory, we derive renormalization group equations that describe vortex unbinding in these media. When the nonequilibirum drive is turned off, the KPZ nonlinearity lambda vanishes and the RG flow gives the usual Kosterlitz-Thouless (KT) transition. On the other hand, with nonlinearity lambda > 0 vortices always unbind, even if the same system with lambda = 0 is superfluid. We predict the finite-size scaling behavior of the superfluid stiffness in the crossover governed by vortex unbinding showing its clear distinction from the scaling associated with the KT transition.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Wachtel, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sieberer, L. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Diehl, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Altman, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-262037
DOI:	10.1103/PhysRevB.94.104520
Journal or Publication Title:	Phys. Rev. B
Volume:	94
Number:	10
Date:	2016
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9969
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language BOSE-EINSTEIN CONDENSATION; QUANTIZED VORTICES; FIELD-THEORY; QUANTUM; DYNAMICS; RENORMALIZATION; POLARITONS; TRANSITION; EXPONENTS; SYMMETRY Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/26203