Quantum probing topological phase transitions by non-Markovianity
Quantum Physics
2019-10-08 v2 Mesoscale and Nanoscale Physics
Abstract
Understanding the physical significance and probing the global invariants characterizing quantum topological phases in extended systems is a main challenge in modern physics with major impact in different areas of science. Here, a quantum-information-inspired probing method is proposed where topological phase transitions are revealed by a non-Markovianity quantifier. The idea is illustrated 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. Qubit decoherence features and non-Markovianity measure clearly signal the topological phase transition of the SSH chain.
Cite
@article{arxiv.1907.05080,
title = {Quantum probing topological phase transitions by non-Markovianity},
author = {Gian Luca Giorgi and Stefano Longhi and Albert Cabot and Roberta Zambrini},
journal= {arXiv preprint arXiv:1907.05080},
year = {2019}
}