Dissipation-driven integrable fermionic systems: From graded Yangians to exact nonequilibrium steady states

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Abstract

Using the Lindblad master equation approach, we investigate the structure of steadystate solutions of open integrable quantum lattice models, driven far from equilibrium by incoherent particle reservoirs attached at the boundaries. We identify a class of boundary dissipation processes which permits to derive exact steady-state density matrices in the form of graded matrix-product operators. All the solutions factorize in terms of vacuum analogues of Baxter's Q-operators which are realized in terms of non-unitary representations of certain finite dimensional subalgebras of graded Yangians. We present a unifying framework which allows to solve fermionic models and naturally incorporates higher-rank symmetries. This enables to explain underlying algebraic content behind most of the previously-found solutions.©

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Ilievski, E. (2017). Dissipation-driven integrable fermionic systems: From graded Yangians to exact nonequilibrium steady states. SciPost Physics, 3(4). https://doi.org/10.21468/SciPostPhys.3.4.031

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