Breaking and trapping Cooper pairs by Rydberg-molecule spectroscopy in atomic Fermi superfluids
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 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.
Keywords
Cite
@article{arxiv.2405.01401,
title = {Breaking and trapping Cooper pairs by Rydberg-molecule spectroscopy in atomic Fermi superfluids},
author = {Chih-Chun Chien and Simeon I. Mistakidis and Hossein R. Sadeghpour},
journal= {arXiv preprint arXiv:2405.01401},
year = {2024}
}
Comments
Main text: 7 pages, 4 figures. Supplemental Material: 6 pages, 10 figures