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Title: Hopf characterization of two-dimensional Floquet topological insulators

Journal Article · · Physical Review Research

We present a topological characterization of time-periodically driven two-band models in 2 + 1 dimensions as Hopf insulators. The intrinsic periodicity of the Floquet system with respect to both time and the underlying two-dimensional momentum space constitutes a map from a three-dimensional torus to the Bloch sphere. As a result, we find that the driven system can be understood by appealing to a Hopf map that is directly constructed from the micromotion of the drive. Previously found winding numbers are shown to correspond to Hopf invariants, which are associated with linking numbers describing the topology of knots in three dimensions. Moreover, after being cast as a Hopf insulator, not only the Chern numbers but also the winding numbers of the Floquet topological insulator become accessible in experiments as linking numbers. We exploit this description to propose a feasible scheme for measuring the complete set of their Floquet topological invariants in optical lattices.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for the Advancement of Topological Semimetals (CATS); Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); German Research Foundation (DFG)
Grant/Contract Number:
AC02-07CH11358; 277974659
OSTI ID:
1560766
Alternate ID(s):
OSTI ID: 1767792
Journal Information:
Physical Review Research, Journal Name: Physical Review Research Vol. 1 Journal Issue: 2; ISSN 2643-1564
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (48)

Unified bulk-boundary correspondence for band insulators journal March 2018
Topological characterization of periodically driven quantum systems journal December 2010
Anomalous Edge States and the Bulk-Edge Correspondence for Periodically Driven Two-Dimensional Systems journal July 2013
Measuring the Chern number of Hofstadter bands with ultracold bosonic atoms journal December 2014
Colloquium: Atomic quantum gases in periodically driven optical lattices journal March 2017
Three-dimensional two-band Floquet topological insulator with Z 2 index journal February 2019
Topological insulators and superconductors journal October 2011
Tomography of Band Insulators from Quench Dynamics journal July 2014
Hopf insulators and their topologically protected surface states journal November 2013
How to Directly Measure Floquet Topological Invariants in Optical Lattices journal June 2019
Bloch state tomography using Wilson lines journal May 2016
Colloquium: Topological insulators journal November 2010
Measuring topology from dynamics by obtaining the Chern number from a linking number journal April 2019
Impurity-bound states and Green's function zeros as local signatures of topology journal August 2015
Experimental reconstruction of the Berry curvature in a Floquet Bloch band journal May 2016
Phase vortices of the quenched Haldane model journal August 2017
Observation of dynamical vortices after quenches in a system with topology journal December 2017
Universal Probes of Two-Dimensional Topological Insulators: Dislocation and π Flux journal March 2012
Topological Crystalline Insulators journal March 2011
Periodic table for Floquet topological insulators journal October 2017
Driving protocol for a Floquet topological phase without static counterpart journal November 2017
Topological quantum chemistry journal July 2017
Topological Surface States in Three-Dimensional Magnetic Insulators journal October 2008
The translational side of topological band insulators journal May 2019
Experimental realization of the topological Haldane model with ultracold fermions journal November 2014
Bulk-boundary correspondence of topological insulators from their respective Green’s functions journal September 2011
Topological Classification of Crystalline Insulators through Band Structure Combinatorics journal December 2017
Symmetry-based indicators of band topology in the 230 space groups journal June 2017
Topological Hopf-Chern insulators and the Hopf superconductor journal July 2016
Inner topological structure of Hopf invariant journal July 2007
Periodic table for topological insulators and superconductors
  • Kitaev, Alexei; Lebedev, Vladimir; Feigel’man, Mikhail
  • ADVANCES IN THEORETICAL PHYSICS: Landau Memorial Conference, AIP Conference Proceedings https://doi.org/10.1063/1.3149495
conference January 2009
State-recycling and time-resolved imaging in topological photonic lattices journal October 2018
Symmetry-protected topological Hopf insulator and its generalizations journal April 2017
Chern number and edge states in the integer quantum Hall effect journal November 1993
The space group classification of topological band-insulators journal December 2012
Uncover Topology by Quantum Quench Dynamics journal December 2018
Observation of photonic anomalous Floquet topological insulators journal January 2017
Measurement of a Topological Edge Invariant in a Microwave Network journal February 2015
Realization of the Hofstadter Hamiltonian with Ultracold Atoms in Optical Lattices journal October 2013
Self-organized pseudo-graphene on grain boundaries in topological band insulators journal June 2016
Observation of Topological Links Associated with Hopf Insulators in a Solid-State Quantum Simulator journal June 2017
Probing topological protection using a designer surface plasmon structure journal May 2016
Topological Bloch oscillations journal July 2018
Realizing the Harper Hamiltonian with Laser-Assisted Tunneling in Optical Lattices journal October 2013
Experimental observation of anomalous topological edge modes in a slowly driven photonic lattice journal January 2017
Dynamical classification of topological quantum phases journal November 2018
Scheme to Measure the Topological Number of a Chern Insulator from Quench Dynamics journal May 2017
Topological insulators and superconductors: tenfold way and dimensional hierarchy journal June 2010

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