Entanglement properties of Floquet-Chern insulators
- New York Univ. (NYU), NY (United States)
Results are presented for the entanglement entropy and spectrum of half-filled graphene following the switch on of a circularly polarized laser. The laser parameters are chosen to correspond to several different Floquet-Chern insulator phases. The entanglement properties of the unitarily evolved wave functions are compared with the state where one of the Floquet bands is completely occupied. The true states show a volume law for the entanglement, whereas the Floquet states show an area law. Qualitative differences are found in the entanglement properties of the off-resonant and on-resonant laser. Edge states are found in the entanglement spectrum corresponding to certain physical edge states expected in a Chern insulator. However, some edge states that would be expected from the Floquet band structure are missing from the entanglement spectrum. An analytic theory is developed for the long-time structure of the entanglement spectrum. Finally, it is argued that only edge states corresponding to off-resonant processes appear in the entanglement spectrum.
- Research Organization:
- New York Univ. (NYU), NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0010821
- OSTI ID:
- 1535801
- Alternate ID(s):
- OSTI ID: 1332387
- Journal Information:
- Physical Review B, Vol. 94, Issue 20; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Topological marker currents in Chern insulators
|
journal | January 2019 |
Topological Entanglement-Spectrum Crossing in Quench Dynamics
|
journal | December 2018 |
Topological Entanglement-Spectrum Crossing in Quench Dynamics | text | January 2017 |
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