期刊
NEW JOURNAL OF PHYSICS
卷 16, 期 -, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/16/5/053016
关键词
spin current; transport enhancement; strong interactions; decoherence; energy dissipation
资金
- European Research Council [319286]
- EPSRC [EP/K038311/1, EP/J010529/1]
- UK EPSRC via the Controlled Quantum Dynamics CDT
- National Research Foundation
- Ministry of Education of Singapore
- Spanish Ministerio de Economia y Competitividad [FIS2012-30625]
- Alexander von Humboldt Foundation
- ERC Synergy grant BioQ
- EU STREP project PAPETS
- Departamento Administrativo de Ciencia, Tecnologia e Innovacion Colciencias
- EPSRC [EP/J010529/1, EP/K038311/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J010529/1, 1102898, EP/K038311/1] Funding Source: researchfish
- European Research Council (ERC) [319286] Funding Source: European Research Council (ERC)
We study the non-equilibrium transport properties of a highly anisotropic two-dimensional lattice of spin-1/2 particles governed by a Heisenberg XXZ Hamiltonian. The anisotropy of the lattice allows us to approximate the system at finite temperature as an array of incoherently coupled one-dimensional chains. We show that in the regime of strong intrachain interactions, the weak interchain coupling considerably boosts spin transport in the driven system. Interestingly, we show that this enhancement increases with the length of the chains, which is related to superdiffusive spin transport. We describe the mechanism behind this effect, compare it to a similar phenomenon in single chains induced by dephasing, and explain why the former is much stronger.
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