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oai:docta.ucm.es:20.500.14352/181652024-08-27T16:40:27Zcom_20.500.14352_14col_20.500.14352_15

Rivas, Ángel Martín-Delgado Alcántara, Miguel Ángel 2023-06-17T22:10:14Z 2023-06-17T22:10:14Z 2017-07-25 2045-2322 10.1038/s41598-017-06722-x https://hdl.handle.net/20.500.14352/18165 http://dx.doi.org/10.1038/s41598-017-06722-x https://www.nature.com 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. eng https://creativecommons.org/licenses/by/3.0/es/ open access Atribución 3.0 España Topological heat transport and symmetry-protected boson currents journal article