Journal
PHYSICAL REVIEW B
Volume 96, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.96.241404
Keywords
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Funding
- DFG [BR 1528/9-1, SFB 910]
- Spanish Ministry [MAT2014-58241-P]
- FPI program
- National Natural Science Foundation of China [U1530401]
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The appearance of topological effects in systems exhibiting a nontrivial topological band structure strongly relies on the coherent wave nature of the equations of motion. Here, we reveal topological dynamics in a classical stochastic random walk version of the Su-Schrieffer-Heeger model with no relation to coherent wave dynamics. We explain that the commonly used topological invariant in the momentum space translates into an invariant in a counting-field space. This invariant gives rise to clear signatures of the topological phase in an associated escape time distribution.
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