Lattice duality for the compact Kardar-Parisi-Zhang equation
arXiv:1604.01043 · doi:10.1103/PhysRevB.94.104521
Abstract
A comprehensive theory of the Kosterlitz-Thouless transition in two-dimensional superfluids in thermal equilibrium can be developed within a dual representation which maps vortices in the superfluid to charges in a Coulomb gas. In this framework, the dissociation of vortex-antivortex pairs at the critical temperature corresponds to the formation of a plasma of free charges. The physics of vortex unbinding in driven-dissipative systems such as fluids of light, on the other hand, is much less understood. Here we make a crucial step to fill this gap by deriving a transformation that maps the compact Kardar-Parisi-Zhang (KPZ) equation, which describes the dynamics of the phase of a driven-dissipative condensate, to a dual electrodynamic theory. The latter is formulated in terms of modified Maxwell equations for the electromagnetic fields and a diffusion equation for the charges representing vortices in the KPZ equation. This mapping utilizes an adaption of the Villain approximation to a generalized Martin-Siggia-Rose functional integral representation of the compact KPZ equation on a lattice.
12 pages
References in corpus (7)
- Quantum fluids of light
- Exciton-polariton condensates
- Keldysh Field Theory for Driven Open Quantum Systems
- Growing interfaces uncover universal fluctuations behind scale invariance
- Electrodynamic duality and vortex unbinding in driven-dissipative condensates
- Temporal coherence of one-dimensional non-equilibrium quantum fluids
- Pattern phase diagram for 2D arrays of coupled limit-cycle oscillators
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