Protocol to engineer Fulde-Ferrell-Larkin-Ovchinnikov states in a cold Fermi gas
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Publication Date
2017Journal Title
PHYSICAL REVIEW A
ISSN
2469-9926
Publisher
American Physical Society (APS)
Volume
96
Issue
2
Number
ARTN 023612
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Dutta, S., & Mueller, E. J. (2017). Protocol to engineer Fulde-Ferrell-Larkin-Ovchinnikov states in a cold Fermi gas. PHYSICAL REVIEW A, 96 (2. ARTN 023612) https://doi.org/10.1103/PhysRevA.96.023612
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
$\uparrow$- and $\downarrow$-spins. Second, one applies a radio-frequency sweep
to selectively break Cooper pairs near the domain walls and transfer the
$\uparrow$-spins to a third spin state which does not interact with the
$\uparrow$- and $\downarrow$-spins. The resulting FFLO state has exactly one
unpaired $\downarrow$-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.
Sponsorship
National Science Foundation Grant No. PHY-1508300
Identifiers
External DOI: https://doi.org/10.1103/PhysRevA.96.023612
This record's URL: https://www.repository.cam.ac.uk/handle/1810/299190
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