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Title: Topological order following a quantum quench
Authors: Tsomokos, D.I.
Hamma, A.
Zhang, W.
Haas, S.
Fazio, R. 
Issue Date: 4-Dec-2009
Citation: Tsomokos, D.I., Hamma, A., Zhang, W., Haas, S., Fazio, R. (2009-12-04). Topological order following a quantum quench. Physical Review A - Atomic, Molecular, and Optical Physics 80 (6) : -. ScholarBank@NUS Repository.
Abstract: We determine the conditions under which topological order survives a rapid quantum quench. Specifically, we consider the case where a quantum spin system is prepared in the ground state of the toric code model and, after the quench, it evolves with a Hamiltonian that does not support topological order. We provide analytical results supported by numerical evidence for a variety of quench Hamiltonians. The robustness of topological order under nonequilibrium situations is tested by studying the topological entropy and a dynamical measure, which makes use of the similarity between partial density matrices obtained from different topological sectors. © 2009 The American Physical Society.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
ISSN: 10502947
DOI: 10.1103/PhysRevA.80.060302
Appears in Collections:Staff Publications

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