22 February 2017 Spin transport in a Lindblad-driven isotropic quantum Heisenberg spin-chain
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Abstract
We investigate the spin transport properties of an isotropic quantum Heisenberg spin-chain. Driving the system out of equilibrium via two different reservoirs at the boundaries, the system exhibits negative differential conductivity for strong driving. We describe the system-reservoir interaction with a Lindblad approach. We show that the interplay between Lindblad dynamics and system dynamics influences highly the spin current. For weak driving, equal rates maximize the current while strong driving shows a counter intuitive behavior. Our findings could guide to an understanding of the transport properties which are dependent on the external driving.
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Leon Droenner, Nicolas Naumann, Markus Heyl, Alexander Carmele, "Spin transport in a Lindblad-driven isotropic quantum Heisenberg spin-chain", Proc. SPIE 10098, Physics and Simulation of Optoelectronic Devices XXV, 100980O (22 February 2017); doi: 10.1117/12.2252076; https://doi.org/10.1117/12.2252076
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