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

Cornell Affiliated Author(s)

Author

S. Dutta
E.J. Mueller

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. ©2017 American Physical Society.

Date Published

Journal

Physical Review A

Volume

96

Issue

2

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85028645222&doi=10.1103%2fPhysRevA.96.023612&partnerID=40&md5=62df86cc721981caed9c8fae6cbbbaf2

DOI

10.1103/PhysRevA.96.023612

Funding Source

1508300
PHY-1508300

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