Journal
NEW JOURNAL OF PHYSICS
Volume 15, Issue -, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1367-2630/15/7/075010
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Funding
- MEXT of Japan, 'Topological Quantum Phenomena' [22103005]
- JPSJ [22540383]
- Grants-in-Aid for Scientific Research [22103001, 22540383, 22103005, 25800199] Funding Source: KAKEN
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We theoretically investigate the effect of intertube tunneling in topological superfluid phases of a quasi-one-dimensional Fermi gas with a Rashba-type spin-orbit interaction. It is shown that the effective Hamiltonian is analogous to that of a nanowire topological superconductor with multibands. Using a hidden mirror symmetry in the system, we introduce a new topological number that ensures the existence of non-Abelian Majorana zero modes even in the presence of intertube tunneling. It is demonstrated from the full numerical calculation of self-consistent equations that some of the Majorana modes survive against the intertube tunneling, when the number of one-dimensional tubes is odd in the y-direction. We also discuss a generalization of our consideration to nanowire topological superconductors.
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