Signatures of unconventional pairing in spin-imbalanced one-dimensional few-fermion systems

Abstract

A system of a few attractively interacting fermionic ${}^6$Li atoms in one-dimensional harmonic confinement is investigated. Non-trivial inter-particle correlations induced by interactions in a particle-imbalanced system are studied in the framework of the noise correlation. In this way, it is shown that evident signatures of strongly correlated fermionic pairs in the Fulde-Ferrell-Larkin-Ovchinnikov state are present in the system and they can be detected by measurements directly accessible within state-of-the-art techniques. The results convincingly show that the exotic pairing mechanism is a very universal phenomenon and can be captured in systems being essentially non-uniform and far from the many-body limit.

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• Unconventional pairing in one-dimensional systems of a few mass-imbalanced ultracold fermions
• Pairing patterns in one-dimensional spin- and mass-imbalanced Fermi gases
• Enhanced visibility of the Fulde-Ferrell-Larkin-Ovchinnikov state in one dimensional Bose-Fermi mixtures near the immiscibility point
• Simulating artificial one-dimensional physics with ultra-cold fermionic atoms: three exemplary themes
• Atomic boson-fermion mixtures in 1D box potentials: Few-body and mean-field many-body analyses
• Spin-imbalanced ultracold Fermi gases in a two-dimensional array of tubes
• Unconventional pairing in few-fermion systems at finite temperature
• Few-body perspective on fermionic pairing in one spatial dimension
• Quantum correlations and spatial localization in trapped one-dimensional ultra-cold Bose-Bose-Bose mixtures
• When does a Fermi puddle become a Fermi sea? Emergence of pairing in two-dimensional trapped mesoscopic Fermi gases
• Unconventional pairing in few-fermion systems tuned by external confinement
• Composite Bosons Superposition Ansatz Approach to One-Dimensional Trapped Few-Fermion Systems