BCS–BEC crossover in cold atomic and in nuclear systems
We review the BCS (Bardeen–Cooper–Schrieffer)–BEC (Bose–Einstein condensation)
crossover phenomenon discussed in an ultracold Fermi atomic gas and a neutron superfluid …
crossover phenomenon discussed in an ultracold Fermi atomic gas and a neutron superfluid …
Theory of non-Hermitian fermionic superfluidity with a complex-valued interaction
Motivated by recent experimental advances in ultracold atoms, we analyze a non-Hermitian
(NH) BCS Hamiltonian with a complex-valued interaction arising from inelastic scattering …
(NH) BCS Hamiltonian with a complex-valued interaction arising from inelastic scattering …
Synthetic dimensions and spin-orbit coupling with an optical clock transition
LF Livi, G Cappellini, M Diem, L Franchi, C Clivati… - Physical review …, 2016 - APS
We demonstrate a novel way of synthesizing spin-orbit interactions in ultracold quantum
gases, based on a single-photon optical clock transition coupling two long-lived electronic …
gases, based on a single-photon optical clock transition coupling two long-lived electronic …
Controlling the interaction of ultracold alkaline-earth atoms
Ultracold alkaline-earth atoms are used in precision measurements and quantum
simulation. Because of their unique atomic structure, they could enable the study of …
simulation. Because of their unique atomic structure, they could enable the study of …
Quasiparticle lifetime of the repulsive Fermi polaron
We investigate the metastable repulsive branch of a mobile impurity coupled to a
degenerate Fermi gas via short-range interactions. We show that the quasiparticle lifetime of …
degenerate Fermi gas via short-range interactions. We show that the quasiparticle lifetime of …
Collective excitations and nonequilibrium phase transition in dissipative fermionic superfluids
We predict a new mechanism to induce collective excitations and a nonequilibrium phase
transition of fermionic superfluids via a sudden switch on of two-body loss, for which we …
transition of fermionic superfluids via a sudden switch on of two-body loss, for which we …
Coherent manipulation of orbital Feshbach molecules of two-electron atoms
G Cappellini, LF Livi, L Franchi, D Tusi… - Physical Review X, 2019 - APS
Ultracold molecules have experienced increasing attention in recent years. Compared to
ultracold atoms, they possess several unique properties that make them perfect candidates …
ultracold atoms, they possess several unique properties that make them perfect candidates …
Enhanced critical temperature, pairing fluctuation effects, and BCS-BEC crossover in a two-band Fermi gas
We study the superfluid critical temperature in a two-band attractive Fermi system with strong
pairing fluctuations associated with both interband and intraband couplings. We focus …
pairing fluctuations associated with both interband and intraband couplings. We focus …
Pairs, trimers, and BCS-BEC crossover near a flat band: Sawtooth lattice
We investigate pairing and superconductivity in the attractive Fermi-Hubbard model on the
one-dimensional sawtooth lattice, which exhibits a flat band by fine-tuning the hopping rates …
one-dimensional sawtooth lattice, which exhibits a flat band by fine-tuning the hopping rates …
Resonant pair-exchange scattering and BCS-BEC crossover in a system composed of dispersive and heavy incipient bands: A Feshbach analogy
We theoretically show that a two-band system with very different masses harbors a resonant
pair scattering that leads to novel pairing properties, as highlighted by the Bardeen-Cooper …
pair scattering that leads to novel pairing properties, as highlighted by the Bardeen-Cooper …