Scientific Results

Dynamical Critical Exponents in Driven-Dissipative Quantum Systems

Year: 2018

Authors: Comaron P., Dagvadorj G., Zamora A., Carusotto I., Proukakis N. P., Szymanska M. H.

Autors Affiliation: [Comaron, P.; Proukakis, N. P.] Newcastle Univ, Sch Math Stat & Phys, Joint Quantum Ctr JQC Durham Newcastle, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England.
[Dagvadorj, G.; Zamora, A.; Szymanska, M. H.] UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England.
[Dagvadorj, G.] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
[Carusotto, I.] INO CNR BEC Ctr, I-38123 Povo, Italy and Univ Trento, Dipartimento Fis, I-38123 Povo, Italy.

Abstract: We study the phase ordering of parametrically and incoherently driven microcavity polaritons after an infinitely rapid quench across the critical region. We confirm that the system, despite its driven-dissipative nature, satisfies the dynamical scaling hypothesis for both driving schemes by exhibiting self-similar patterns for the two-point correlator at late times of the phase ordering. We show that polaritons are characterized by the dynamical critical exponent z approximate to 2 with topological defects playing a fundamental role in the dynamics, giving logarithmic corrections both to the power-law decay of the number of vortices and to the associated growth of the characteristic length scale.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 121 (9)      Pages from: 095302-1  to: 095302-6

KeyWords: phase-ordering kinetics; XY model;
DOI: 10.1103/PhysRevLett.121.095302

Citations: 25
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