Abstract
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 Bardeen-Cooper-Schrieffer (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.
Recommended Citation
C. C. Chien et al., "Breaking and Trapping Cooper Pairs by Rydberg-molecule Spectroscopy in Atomic Fermi Superfluids," Physical Review A, vol. 110, no. 5, article no. L051303, American Physical Society, Nov 2024.
The definitive version is available at https://doi.org/10.1103/PhysRevA.110.L051303
Department(s)
Physics
International Standard Serial Number (ISSN)
2469-9934; 2469-9926
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2025 American Physical Society, All rights reserved.
Publication Date
01 Nov 2024
Comments
National Science Foundation, Grant PHY-2310656