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Iemini F, Mazza L, Fallani L, et al. Majorana Quasiparticles Protected by Z_{2} Angular Momentum Conservation. Phys Rev Lett. 2017;118(20):200404doi: 10.1103/PhysRevLett.118.200404.
Iemini, F., Mazza, L., Fallani, L., Zoller, P., Fazio, R., & Dalmonte, M. (2017). Majorana Quasiparticles Protected by Z_{2} Angular Momentum Conservation. Physical review letters, 118(20), 200404. https://doi.org/10.1103/PhysRevLett.118.200404
Iemini, F, et al. "Majorana Quasiparticles Protected by Z_{2} Angular Momentum Conservation." Physical review letters vol. 118,20 (2017): 200404. doi: https://doi.org/10.1103/PhysRevLett.118.200404
Iemini F, Mazza L, Fallani L, Zoller P, Fazio R, Dalmonte M. Majorana Quasiparticles Protected by Z_{2} Angular Momentum Conservation. Phys Rev Lett. 2017 May 19;118(20):200404. doi: 10.1103/PhysRevLett.118.200404. Epub 2017 May 19. PMID: 28581780.
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Phys Rev Lett. 2017 May 19;118(20):200404. doi: 10.1103/PhysRevLett.118.200404. Epub 2017 May 19.

Majorana Quasiparticles Protected by Z_{2} Angular Momentum Conservation.

Physical review letters

F Iemini, L Mazza, L Fallani, P Zoller, R Fazio, M Dalmonte

Affiliations

  1. Abdus Salam International Center for Theoretical Physics, Strada Costiera 11, I-34151 Trieste, Italy.
  2. Departement de Physique, Ecole Normale Superieure/PSL Research University, CNRS, 24 rue Lhomond, F-75005 Paris, France.
  3. Department of Physics and Astronomy, University of Florence, I-50019 Sesto Fiorentino, Italy.
  4. LENS European Laboratory for Nonlinear Spectroscopy, I-50019 Sesto Fiorentino, Italy.
  5. Institute for Theoretical Physics, University of Innsbruck, A-6020 Innsbruck, Austria.
  6. Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, A-6020 Innsbruck, Austria.
  7. NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, I-56126 Pisa, Italy.

PMID: 28581780 DOI: 10.1103/PhysRevLett.118.200404

Abstract

We show how angular momentum conservation can stabilize a symmetry-protected quasitopological phase of matter supporting Majorana quasiparticles as edge modes in one-dimensional cold atom gases. We investigate a number-conserving four-species Hubbard model in the presence of spin-orbit coupling. The latter reduces the global spin symmetry to an angular momentum parity symmetry, which provides an extremely robust protection mechanism that does not rely on any coupling to additional reservoirs. The emergence of Majorana edge modes is elucidated using field theory techniques, and corroborated by density-matrix-renormalization-group simulations. Our results pave the way toward the observation of Majorana edge modes with alkaline-earth-like fermions in optical lattices, where all basic ingredients for our recipe-spin-orbit coupling and strong interorbital interactions-have been experimentally realized over the last two years.

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