Direct observation of nonlocal fermion pairing in an attractive Fermi-Hubbard gas
Direct observation of nonlocal fermion pairing in an attractive Fermi-Hubbard gas
复制标题
直接观察有吸引力的费米-哈伯德气体中的非局域费米子配对
DOI:
10.1126/science.ade4245
复制
发表时间:
2023
期刊:
影响因子:
56.9
通讯作者:
Zwierlein, Martin
中科院分区:
文献类型:
--
作者:
Hartke, Thomas;Oreg, Botond;Turnbaugh, Carter;Jia, Ningyuan;Zwierlein, Martin
The Hubbard model of attractively interacting fermions provides a paradigmatic setting for fermion pairing. It features a crossover between Bose-Einstein condensation of tightly bound pairs and Bardeen-Cooper-Schrieffer superfluidity of long-range Cooper pairs, and a “pseudo-gap” region where pairs form above the superfluid critical temperature. We directly observe the nonlocal nature of fermion pairing in a Hubbard lattice gas, using spin- and density-resolved imaging of1000 fermionic potassium-40 atoms under a bilayer microscope. Complete fermion pairing is revealed by the vanishing of global spin fluctuations with increasing attraction. In the strongly correlated regime, the fermion pair size is found to be on the order of the average interparticle spacing. Our study informs theories of pseudo-gap behavior in strongly correlated fermion systems.
影响因子:
56.9
作者:
J. Koepsell;Dominik Bourgund;P. Sompet;Sarah Hirthe;A. Bohrdt;Yao Wang;F. Grusdt;E. Demler;G. Salomon;C. Gross;I. Bloch
通讯作者:
J. Koepsell;Dominik Bourgund;P. Sompet;Sarah Hirthe;A. Bohrdt;Yao Wang;F. Grusdt;E. Demler;G. Salomon;C. Gross;I. Bloch
影响因子:
64.8
作者:
Koepsell, Joannis;Vijayan, Jayadev;Gross, Christian
通讯作者:
Gross, Christian
DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
J. M. Singer;T. Schneider;M. H. Pedersen
通讯作者:
M. H. Pedersen