Topological heat transport and symmetry-protected boson currents



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Rivas, Ángel and Martín Delgado, Miguel Ángel (2017) Topological heat transport and symmetry-protected boson currents. Scientific reports, 7 . ISSN 2045-2322

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The study of non-equilibrium properties in topological systems is of practical and fundamental importance. Here, we analyze the stationary properties of a two-dimensional bosonic Hofstadter lattice coupled to two thermal baths in the quantum open-system formalism. Novel phenomena appear like chiral edge heat currents that are the out-of-equilibrium counterparts of the zero-temperature edge currents. They support a new concept of dissipative symmetry-protection, where a set of discrete symmetries protects topological heat currents, difering from the symmetry-protection devised in closed systems and zero-temperature. Remarkably, one of these currents fows opposite to the decreasing external temperature gradient. As the starting point, we consider the case of a single external reservoir already showing prominent results like thermal erasure efects and topological thermal currents. Our results are experimentally accessible with platforms like photonics systems and optical lattices.

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© 2017 the autors and Macmillan Publishers Limited, part of Springer Nature. We acknowledge the Spanish MINECO grants FIS2015-67411, FIS2012-33152, and a “Juan de la Cierva Incorporación” research contract, the CAM research consortium QUITEMAD+ S2013/ICE-2801, and U.S. Army Research Ofce through grant W911NF-14-1-0103 for partial fnancial support.

Uncontrolled Keywords:Markovian master-equatins; Magnetic-fields; Edge states; Insulators; Photonics.
Subjects:Sciences > Physics > Physics-Mathematical models
ID Code:45066
Deposited On:22 Nov 2017 11:22
Last Modified:11 Dec 2017 11:07

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