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Protocol to engineer Fulde-Ferrell-Larkin-Ovchinnikov states in a cold Fermi gas

Published version
Peer-reviewed

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Article

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Authors

Mueller, Erich J 

Abstract

We propose a two-step experimental protocol to directly engineer Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) states in a cold two-component Fermi gas loaded into a quasi-one-dimensional trap. First, one uses phase imprinting to create a train of domain walls in a superfluid with equal number of - and -spins. Second, one applies a radio-frequency sweep to selectively break Cooper pairs near the domain walls and transfer the -spins to a third spin state which does not interact with the - and -spins. The resulting FFLO state has exactly one unpaired -spin in each domain wall and is stable for all values of domain-wall separation and interaction strength. We show that the protocol can be implemented with high fidelity at sufficiently strong interactions for a wide range of parameters available in present-day experimental conditions.

Description

Keywords

cond-mat.quant-gas, cond-mat.quant-gas, cond-mat.supr-con

Journal Title

PHYSICAL REVIEW A

Conference Name

Journal ISSN

2469-9926
2469-9934

Volume Title

96

Publisher

American Physical Society (APS)

Rights

Publisher's own licence
Sponsorship
National Science Foundation Grant No. PHY-1508300