43 citations · 295 across the 30 of their papers we have counts for
16 papers · 1 filter
Crossing the Rotational Sound Barrier in a Quantum Solvent
Baptiste Coquinot, Giacomo Bighin, Mikhail Lemeshko +1
Molecules embedded in superfluids provide an experimentally controllable platform for investigating impurity physics. Here, we investigate a driven molecule rotating in a superflui…
Environment-limited transfer of angular momentum in Bose liquids
Alberto Cappellaro, Giacomo Bighin, Igor Cherepanov +1
Impurity motion in a many-body environment has been a central issue in the field of low-temperature physics for decades. In bosonic quantum fluids, the onset of a drag force experi…
Finite-size effects in the two-dimensional BCS-BEC crossover
M. Lanaro, G. Bighin, L. Dell'Anna +1
We study the finite-size effects on the BCS-BEC crossover in two dimensions, occurring in confined fermionic superfluids. We analyze several thermodynamic properties, such as the c…
Non-equilibrium dynamics of dipolar polarons
Artem G. Volosniev, Giacomo Bighin, Luis Santos +1
We study the out-of-equilibrium quantum dynamics of dipolar polarons, i.e., impurities immersed in a dipolar Bose-Einstein condensate, after a quench of the impurity-boson interact…
Resonantly enhanced superconductivity mediated by spinor condensates
Giacomo Bighin, Puneet A. Murthy, Nicolò Defenu +1
Achieving strong interactions in fermionic many-body systems is a major theme of research in condensed matter physics. It is well-known that interactions between fermions can be me…
Unitary Fermi superfluid near the critical temperature: thermodynamics and sound modes from elementary excitations
G. Bighin, A. Cappellaro, L. Salasnich
We compare recent experimental results [Science 375, 528 (2022)] of the superfluid unitary Fermi gas near the critical temperature with a thermodynamic model based on elementary ex…
An impurity in a heteronuclear two-component Bose mixture
Giacomo Bighin, Alessia Burchianti, Francesco Minardi +1
We study the fate of an impurity in an ultracold heteronuclear Bose mixture, focusing on the experimentally relevant case of a K-Rb mixture, with the impurity in a $^…
Propagation of first and second sound in a two-dimensional Fermi superfluid
A. Tononi, A. Cappellaro, G. Bighin +1
Sound propagation is a macroscopic manifestation of the interplay between the equilibrium thermodynamics and the dynamical transport properties of fluids. Here, for a two-dimension…
Diagrammatic Monte Carlo approach to angular momentum in quantum many-particle systems
G. Bighin, T. V. Tscherbul, M. Lemeshko
We introduce a Diagrammatic Monte Carlo (DiagMC) approach to angular momentum properties of quantum many-particle systems possessing a macroscopic number of degrees of freedom. The…
Renormalization of the superfluid density in the two-dimensional BCS-BEC crossover
G. Bighin, L. Salasnich
We analyze the theoretical derivation of the beyond-mean-field equation of state for a two-dimensional gas of dilute, ultracold alkali-metal atoms in the Bardeen-Cooper-Schrieffer…
Diagrammatic approach to orbital quantum impurities interacting with a many-particle environment
Giacomo Bighin, Mikhail Lemeshko
Recently it was shown that an impurity exchanging orbital angular momentum with a surrounding bath can be described in terms of the angulon quasiparticle [Phys. Rev. Lett. 118, 095…
Vortices and antivortices in two-dimensional ultracold Fermi gases
G. Bighin, L. Salasnich
Vortices are commonly observed in the context of classical hydrodynamics: from whirlpools after stirring the coffee in a cup to a violent atmospheric phenomenon such as a tornado,…
Quantum fluctuations and vortex-antivortex unbinding in the 2D BCS-BEC crossover
L. Salasnich, G. Bighin
Very recently quasi two-dimensional (2D) systems made of attractive fermionic alkali-metal atoms with a widely tunable interaction due to Fano-Feshbach resonances have been realize…
Gaussian fluctuations in the two-dimensional BCS-BEC crossover: finite temperature properties
G Bighin, L Salasnich
The role of fluctuations is enhanced in lower dimensionality systems: in a two dimensions off-diagonal long-range order is destroyed by the fluctuations at any finite temperature,…
Finite-temperature quantum fluctuations in two-dimensional Fermi superfluids
G. Bighin, L. Salasnich
In two-dimensional systems with a continuous symmetry the Mermin-Wagner-Hohenberg theorem precludes spontaneous symmetry breaking and condensation at finite temperature. The Berezi…
Scattering length of composite bosons in the 3D BCS-BEC crossover
L. Salasnich, G. Bighin
We study the zero-temperature grand potential of a three-dimensional superfluid made of ultracold fermionic alkali-metal atoms in the BCS-BEC crossover. In particular, we analyze t…