Pauli Blocking Effect on 2D Trimers Near Feshbach Resonance

Nikolaj Thomas Zinner

David MacNeill, Fei Zhou

In this Letter we study the effect of Pauli blocking on Efimov states in a quantum Fermi gas and illustrate that the universal Efimov potential is altered at large distances. We obtain the universal spectrum flow of Efimov trimers when the Fermi density is varied and further consider the effect of scattering of trimers by the Fermi sea. We argue that the universal flow is robust against fluctuating particle-hole pairs that result in an infrared catastrophe in impurity problems.

Scott B. Papp, Brian DeMarco, Deborah Jin

Nicolai Gayle Nygaard, JAMES E. JUN. WILLIAMS, Tetsuro Nikuni +1 more

Christian Sanner, Lindsay Sonderhouse, Ross B. Hutson +3 more

Hiroyuki Tajima, Hajime Moriya, W. Horiuchi +2 more

We theoretically investigate the fate of a neutron-alpha $p$-wave resonance in dilute neutron matter, which may be encountered in neutron stars and supernova explosions. While $^{5}\mathrm{He}$ is known as a resonant state that decays to a neutron and an alpha particle in vacuum, this unstable state turns into a stable bound state in the neutron Fermi sea because the decay process is forbidden by the Pauli-blocking effect of neutrons. Such a resonance-to-bound transition assisted by the Pauli-blocking effect can be realized in cold atomic experiments for a quantum mixture near the heteronuclear Feshbach resonance.