期刊
PHYSICAL REVIEW A
卷 80, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.80.060302
关键词
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资金
- EPSRC-GB [EP/D065305/1]
- National Research Foundation and Ministry of Education Singapore
- NSF [DMR0804914]
- Engineering and Physical Sciences Research Council [EP/D065305/1] Funding Source: researchfish
- EPSRC [EP/D065305/1] Funding Source: UKRI
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.
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