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  Universal Optical Control of Chiral Superconductors and Majorana Modes

Claassen, M., Kennes, D. M., Zingl, M., Sentef, M. A., & Rubio, A. (2019). Universal Optical Control of Chiral Superconductors and Majorana Modes. Nature Physics, ?(?):?, pp.?-? doi:10.1038/s41567-019-0532-6.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-7442-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-AE38-B
Genre: Journal Article

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https://arxiv.org/abs/1810.06536 (Preprint)
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https://dx.doi.org/10.1038/s41567-019-0532-6 (Publisher version)
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 Creators:
Claassen, M.1, Author
Kennes, D. M.2, Author
Zingl, M.1, Author
Sentef, M. A.3, 4, Author              
Rubio, A.1, 4, 5, Author              
Affiliations:
1Center for Computational Quantum Physics, Simons Foundation Flatiron Institute, New York, ou_persistent22              
2Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin, ou_persistent22              
3Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3012828              
4Center for Free Electron Laser Science, ou_persistent22              
5Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              

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Free keywords: Quantum fluids and solids; Quantum information; Superconducting properties and materials; Topological insulators
 Abstract: Chiral superconductors are a class of unconventional superconductors that host topologically protected chiral Majorana fermions at interfaces and domain walls1,2,3, quasiparticles4,5,6 that could serve as a platform for topological quantum computing7. Here we show that, in analogy to a qubit, the out-of-equilibrium superconducting state in such materials can be described by a Bloch vector and predict that they can be controlled on ultrafast timescales. The all-optical control mechanism is universal, permitting arbitrary rotations of the order parameter, and can induce a dynamical change of handedness of the condensate. It relies on transient breaking of crystal symmetries via choice of pulse polarization to enable arbitrary rotations of the Bloch vector. The mechanism extends to ultrafast timescales and the engineered state persists after the pump is switched off. We predict that these phenomena should appear in graphene8,9,10 or magic-angle twisted bilayer graphene11,12,13,14, as well as Sr2RuO4 (refs. 15,16). Furthermore, we show that chiral superconductivity can be detected in time-resolved pump–probe measurements. This paves the way towards a robust mechanism for ultrafast control and measurement of chirally ordered phases and Majorana modes.

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Language(s): eng - English
 Dates: 2018-10-162019-04-122019-05-27
 Publication Status: Published online
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: arXiv: 1810.06536
DOI: 10.1038/s41567-019-0532-6
 Degree: -

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Project name : We thank A. Georges and A. J. Millis for helpful discussions. M.C. and M.Z. are supported by the Flatiron Institute, a division of the Simons Foundation. D.M.K. and M.A.S. acknowledge support from the DFG through the Emmy Noether programme (KA 3360/2-1 and SE 2558/2-1, respectively). We acknowledge financial support from the European Union Horizon 2020 research and innovation programme under the European Research Council (ERC Advanced Grant Agreement no. 69409).
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Title: Nature Physics
  Other : Nat. Phys.
Source Genre: Journal
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Publ. Info: London : Nature Pub. Group
Pages: 7 Volume / Issue: ? (?) Sequence Number: ? Start / End Page: ? - ? Identifier: ISSN: 1745-2473
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000025850