Probing topological phase transitions by non-Markovianity

We present a quantum-information-inspired probing method where topological phase transitions are revealed by a non-Markovianity quantifier. We illustrate our idea by considering the decoherence dynamics of an external read-out qubit that probes a Su-Schrieffer-Heeger (SSH) chain with either pure dephasing or dissipative coupling. The qubit decoherence features and non-Markovianity clearly signal the topological phase transition of the SSH model.

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Llorenç Serra
971 17 28 05
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