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Title: Floquet Majorana Fermions for Topological Qubits in Superconducting Devices and Cold-Atom Systems

Authors:
; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1104283
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 111; Journal Issue: 4; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Liu, Dong E., Levchenko, Alex, and Baranger, Harold U. Floquet Majorana Fermions for Topological Qubits in Superconducting Devices and Cold-Atom Systems. United States: N. p., 2013. Web. doi:10.1103/PhysRevLett.111.047002.
Liu, Dong E., Levchenko, Alex, & Baranger, Harold U. Floquet Majorana Fermions for Topological Qubits in Superconducting Devices and Cold-Atom Systems. United States. doi:10.1103/PhysRevLett.111.047002.
Liu, Dong E., Levchenko, Alex, and Baranger, Harold U. Mon . "Floquet Majorana Fermions for Topological Qubits in Superconducting Devices and Cold-Atom Systems". United States. doi:10.1103/PhysRevLett.111.047002.
@article{osti_1104283,
title = {Floquet Majorana Fermions for Topological Qubits in Superconducting Devices and Cold-Atom Systems},
author = {Liu, Dong E. and Levchenko, Alex and Baranger, Harold U.},
abstractNote = {},
doi = {10.1103/PhysRevLett.111.047002},
journal = {Physical Review Letters},
number = 4,
volume = 111,
place = {United States},
year = {Mon Jul 22 00:00:00 EDT 2013},
month = {Mon Jul 22 00:00:00 EDT 2013}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevLett.111.047002

Citation Metrics:
Cited by: 64works
Citation information provided by
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  • Cited by 68
  • We introduce a new approach to create and detect Majorana fermions using optically trapped 1D fermionic atoms. In our proposed setup, two internal states of the atoms couple via an optical Raman transition--simultaneously inducing an effective spin-orbit interaction and magnetic field--while a background molecular BEC cloud generates s-wave pairing for the atoms. The resulting cold-atom quantum wire supports Majorana fermions at phase boundaries between topologically trivial and nontrivial regions, as well as ''Floquet Majorana fermions'' when the system is periodically driven. We analyze experimental parameters, detection schemes, and various imperfections.
  • We propose the experimental setup of an interferometer for the observation of neutral Majorana fermions on topological insulator-superconductor-ferromagnet junctions. We show that the extended lattice defects naturally present in materials, dislocations, induce spin currents on the edges while keeping the bulk time-reversal symmetry intact. We propose a simple two-terminal conductance measurement in an interferometer formed by two edge point contacts, which reveals the nature of Majorana states through the effect of dislocations. The zero-temperature magneto-conductance changes from even oscillations with period {phi}{sub 0}/2 ({phi}{sub 0} is the flux quantum hc/e) to odd oscillations with period {phi}{sub 0}, when nontrivial dislocationsmore » are present and the Majorana states are sufficiently strongly coupled. Additionally, the conductance acquires a notable asymmetry as a function of the incident electron energy, due to the topological influence of the dislocations, while resonances appear at the coupling energy of Majorana states.« less
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