Breaking and trapping Cooper pairs by Rydberg-molecule spectroscopy in atomic Fermi superfluids

We propose a spectroscopic probe of the breaking and localization of Cooper pairs in an atomic Fermi superfluid interacting with a Rydberg impurity. This is achieved by monitoring the formation of diatomic and triatomic ultralong-range molecular species in the superfluid across the BCS - Bose Einste...

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Bibliographic Details
Main Authors Chien, Chih-Chun, Mistakidis, Simeon I, Sadeghpour, Hossein R
Format Journal Article
LanguageEnglish
Published 02.05.2024
Subjects
Physics - Quantum Gases
Physics - Quantum Physics
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Summary:We propose a spectroscopic probe of the breaking and localization of Cooper pairs in an atomic Fermi superfluid interacting with a Rydberg impurity. This is achieved by monitoring the formation of diatomic and triatomic ultralong-range molecular species in the superfluid across the BCS - Bose Einstein condensation (BEC) crossover. The triatomic Rydberg molecule in the BEC regime heralds the trapping of a tightly-bound Cooper pair, reminiscent of pion capture in nuclear matter, while the breaking of a Cooper pair on the BCS side by a diatomic Rydberg molecule is evocative of binary-star tidal disruption by a black hole. Spectroscopy of the Fermi superfluid and Rydberg molecules allows for an estimation of the Cooper-pair size while the Rydberg molecule binding energies discern many-body pairing effects.
DOI:10.48550/arxiv.2405.01401