Berislav Buča (Author), Tomaž Prosen (Author)

Abstract

In this minireview we will discuss recent progress in the analytical study of current-carrying non-equilibrium steady states (NESS) that can be constructed in terms of a matrix product ansatz. We will focus on one-dimensional exactly solvable strongly correlated cases, and will study both quantum models, and classical models which are deterministic in the bulk. The only source of classical stochasticity in the time-evolution will come from the boundaries of the system. Physically, these boundaries may be understood as Markovian baths, which drive the current through the system. The examples studied include the open XXZ Heisenberg spin chain, the open Hubbard model, and a classical integrable reversible cellular automaton, namely the Rule 54 of A. Bobenko et al. [A. Bobenko et al., Commun. Math. Phys. 158, 127 (1993)] with stochastic boundaries. The quantum NESS can be at least partially understood through the Yang–Baxter integrability structure of the underlying integrable bulk Hamiltonian, whereas for the Rule 54 model NESS seems to come from a seemingly unrelated integrability theory. In both the quantum and the classical case, the underlying matrix product ansatz defining the NESS also allows for construction of novel conservation laws of the bulk models themselves. In the classical case, a modification of the matrix product ansatz also allows for construction of states beyond the steady state (i.e., some of the decay modes – Liouvillian eigenvectors of the model). We hope that this article will help further the quest to unite different perspectives of integrability of NESS (of both quantum and classical models) into a single unified framework.

Keywords

kvantna mehanika;klasični modeli;močno korelirani sistemi;neravnovesni sistemi;quantum mechanics;classical models;strongly correlated systems;non-equilibrium systems;

Data

Language: English
Year of publishing:
Typology: 1.02 - Review Article
Organization: UL FMF - Faculty of Mathematics and Physics
UDC: 530.145
COBISS: 3249252 Link will open in a new window
ISSN: 1951-6355
Views: 560
Downloads: 323
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Other data

Secondary language: Slovenian
Secondary keywords: kvantna mehanika;klasični modeli;močno korelirani sistemi;neravnovesni sistemi;
Embargo end date (OpenAIRE): 2019-09-28
Pages: str. 421-444
Volume: ǂVol. ǂ227
Issue: ǂiss. ǂ3/4
Chronology: 2018
DOI: 10.1140/epjst/e2018-00100-9
ID: 10973941