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  Floquet Engineering Topological Many-Body Localized Systems

Decker, K., Karrasch, C., Eisert, J., & Kennes, D. M. (2020). Floquet Engineering Topological Many-Body Localized Systems. Physical Review Letters, 124(19): 190601. doi:10.1103/PhysRevLett.124.190601.

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PhysRevLett.124.190601.pdf (Publisher version), 710KB
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https://arxiv.org/abs/1911.01269 (Preprint)
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 Creators:
Decker, K. S. C.1, Author
Karrasch, C.1, Author
Eisert, J.2, Author
Kennes, D. M.3, 4, 5, Author           
Affiliations:
1Technische Universität Braunschweig, Institut für Mathematische Physik, ou_persistent22              
2Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin, ou_persistent22              
3Institut für Theorie der Statistischen Physik, RWTH Aachen University and JARA-Fundamentals of Future Information Technology, ou_persistent22              
4Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
5Center for Free-Electron Laser Science, ou_persistent22              

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 Abstract: We show how second-order Floquet engineering can be employed to realize systems in which many-body localization coexists with topological properties in a driven system. This allows one to implement and dynamically control a symmetry protected topologically ordered qubit even at high energies, overcoming the roadblock that the respective states cannot be prepared as ground states of nearest-neighbor Hamiltonians. Floquet engineering—the idea that a periodically driven nonequilibrium system can effectively emulate the physics of a different Hamiltonian—is exploited to approximate an effective three-body interaction among spins in one dimension, using time-dependent two-body interactions only. In the effective system, emulated topology and disorder coexist, which provides an intriguing insight into the interplay of many-body localization that defies our standard understanding of thermodynamics and into the topological phases of matter, which are of fundamental and technological importance. We demonstrate explicitly how combining Floquet engineering, topology, and many-body localization allows one to harvest the advantages (time-dependent control, topological protection, and reduction of heating, respectively) of each of these subfields while protecting them from their disadvantages (heating, static control parameters, and strong disorder).

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Language(s): eng - English
 Dates: 2019-11-192020-04-162020-05-112020-05-15
 Publication Status: Published in print
 Pages: -
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 Rev. Type: Peer
 Identifiers: arXiv: 1911.01269
DOI: 10.1103/PhysRevLett.124.190601
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Project name : -
Grant ID : 817482
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)
Project name : This work has been supported by the Deutsche Forschungsgemeinschaft through the CRC 183 (Projects No. A01, No. A03, and No. B01), the DFG FOR 2724, the Cluster of Excellence Matter and Light for Quantum Computing (ML4Q) EXC 2004/1—390534769, and through the Emmy Noether program (KA 3360/2-2). This work has also received funding from the European Union’s Horizon2020 research and innovation programme under grant agreement No. 817482 (PASQuanS). We further acknowledge support from the Max Planck—New York City Center for Non-Equilibrium Quantum Phenomena.
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 124 (19) Sequence Number: 190601 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1