Journal
PHYSICAL REVIEW B
Volume 94, Issue 15, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.94.155104
Keywords
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Funding
- EPSRC Grants [EP/J017639/1, EP/K030094/1]
- EPSRC Centre for Cross-Disciplinary Approaches to Non-Equilibrium Systems (CANES) [EP/L015854/1]
- EPSRC [EP/J017639/1, EP/K030094/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/K030094/1, EP/J017639/1] Funding Source: researchfish
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We investigate the transport properties of Chern insulators following a quantum quench between topological and nontopological phases. Recent works have shown that this yields an excited state for which the Chern number is preserved under unitary evolution. However, this does not imply the preservation of other physical observables, as we stressed in our previous work. Here we provide an analysis of the Hall response following a quantum quench in an isolated system, with explicit results for the Haldane model. We show that the Hall conductance is no longer related to the Chern number in the postquench state, in agreement with previous work. We also examine the dynamics of the edge currents in finite-size systems with open boundary conditions along one direction. We show that the late-time behavior is captured by a Generalized Gibbs Ensemble, after multiple traversals of the sample. We discuss the effects of generic open boundary conditions and confinement potentials.
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