- Tytuł:
- Resonance Superfluidity in a Quantum Degenerate Fermi Gas
- Autorzy:
-
Kokkelmans, S.
Holland, M.
Walser, R.
Chiofalo, M. - Powiązania:
- https://bibliotekanauki.pl/articles/2030471.pdf
- Data publikacji:
- 2002-03
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
03.75.Fi
67.60.-g
74.20.-z - Opis:
- We consider the superfluid phase transition that arises when a Feshbach resonance pairing occurs in a dilute Fermi gas. This is related to the phenomenon of superconductivity described by the seminal Bardeen-Cooper-Schrieffer theory. In superconductivity, the phase transition is caused by a coupling between pairs of electrons within the medium. This coupling is perturbative and leads to a critical temperature T$\text{}_{c}$ which is small compared to the Fermi temperature T$\text{}_{F}$. Even high-T$\text{}_{c}$ superconductors typically have a critical temperature which is two orders of magnitude below T$\text{}_{F}$. Here we describe a resonance pairing mechanism in a quantum degenerate gas of potassium ($\text{}^{40}$ K) atoms which leads to superfluidity in a novel regime - a regime that promises the unique opportunity to experimentally study the cross-over from the Bardeen-Cooper-Schrieffer phase of weakly-coupled fermions to the Bose-Einstein condensate of strongly-bound composite bosons. We find that the transition to a superfluid phase is possible at the high critical temperature of about 0.5 T$\text{}_{F}$. It should be straightforward to verify this prediction, since these temperatures can already be achieved experimentally.
- Źródło:
-
Acta Physica Polonica A; 2002, 101, 3; 387-397
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł