Ariel Sommer
MIT
Fermion Pairing from Three to Two Dimensions
Abstract:
Strongly correlated fermions in an array of two-dimensional planes
coupled via tunneling serve as an important model system for
high-temperature superconductors and layered organic conductors. We
realize this model using ultracold fermionic atoms in a
one-dimensional optical lattice near a Feshbach resonance. The depth
of the lattice controls the interlayer coupling, and tunes the system
between three and two dimensions. Pairing between fermions is studied
using radio-frequency spectroscopy. The binding energy of fermion
pairs is determined along the dimensional crossover and for different
interaction strengths through the BEC-BCS crossover.
