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Topological superfluids with finite-momentum pairing and Majorana fermions

Author

Listed:
  • Chunlei Qu

    (The University of Texas at Dallas)

  • Zhen Zheng

    (Key Laboratory of Quantum Information, University of Science and Technology of China)

  • Ming Gong

    (The Chinese University of Hong Kong)

  • Yong Xu

    (The University of Texas at Dallas)

  • Li Mao

    (The University of Texas at Dallas)

  • Xubo Zou

    (Key Laboratory of Quantum Information, University of Science and Technology of China)

  • Guangcan Guo

    (Key Laboratory of Quantum Information, University of Science and Technology of China)

  • Chuanwei Zhang

    (The University of Texas at Dallas)

Abstract

Majorana fermions (MFs), quantum particles that are their own antiparticles, are not only of fundamental importance in elementary particle physics and dark matter, but also building blocks for fault-tolerant quantum computation. Recently MFs have been intensively studied in solid state and cold atomic systems. These studies are generally based on superconducting pairing with zero total momentum. On the other hand, finite total momentum Cooper pairings, known as Fulde–Ferrell (FF) Larkin–Ovchinnikov (LO) states, were widely studied in many branches of physics. However, whether FF and LO superconductors can support MFs has not been explored. Here we show that MFs can exist in certain types of gapped FF states, yielding a new quantum matter: topological FF superfluids/superconductors. We demonstrate the existence of such topological FF superfluids and the associated MFs using spin–orbit-coupled degenerate Fermi gases and derive their parameter regions. The implementation of topological FF superconductors in semiconductor/superconductor heterostructures is also discussed.

Suggested Citation

  • Chunlei Qu & Zhen Zheng & Ming Gong & Yong Xu & Li Mao & Xubo Zou & Guangcan Guo & Chuanwei Zhang, 2013. "Topological superfluids with finite-momentum pairing and Majorana fermions," Nature Communications, Nature, vol. 4(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3710
    DOI: 10.1038/ncomms3710
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