43 citations · 295 across the 30 of their papers we have counts for
30 papers
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…
Optical centrifuge as a probe of strong dissipative coupling between a molecular rotor and superfluid helium
Ian MacPhail-Bartley, Sören E. Mahr, Cameron E. Peters +7
A macroscopic manifestation of superfluidity is that objects moving through liquid helium experience negligible friction below the Landau critical velocity. How this frictionless m…
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…
Universal scaling in real dimension
Giacomo Bighin, Tilman Enss, Nicolò Defenu
The concept of universality has shaped our understanding of many-body physics, but is mostly limited to homogenous systems. Here, we present a study of universality on a non-homoge…
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…
Diagrammatic Monte Carlo for electronic correlation in molecules: high-order many-body perturbation theory with low scaling
G. Bighin, Q. P. Ho, M. Lemeshko +1
We present a low-scaling diagrammatic Monte Carlo approach to molecular correlation energies. Using combinatorial graph theory to encode many-body Hugenholtz diagrams, we sample th…
A simple model for high rotational excitations of molecules in a superfluid
Igor N. Cherepanov, Giacomo Bighin, Constant A. Schouder +3
We present a simple quantum mechanical model describing excited rotational states of molecules in superfluid helium nanodroplets, as recently studied in non-adiabatic molecular ali…
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 $^…
Excited rotational states of molecules in a superfluid
Igor N. Cherepanov, Giacomo Bighin, Constant A. Schouder +6
We combine experimental and theoretical approaches to explore excited rotational states of molecules embedded in helium nanodroplets using CS and I as examples. Laser-induc…
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…
Rotational coherence spectroscopy of molecules in helium nanodroplets: Reconciling the time and the frequency domains
Adam S. Chatterley, Lars Christiansen, Constant A. Schouder +7
Alignment of OCS, CS and I molecules embedded in helium nanodroplets is measured as a function of time following rotational excitation by a non-resonant, comparatively weak…
Intermolecular forces and correlations mediated by a phonon bath
Xiang Li, Enderalp Yakaboylu, Giacomo Bighin +3
Inspired by the possibility to experimentally manipulate and enhance chemical reactivity in helium nanodroplets, we investigate the effective interaction and the resulting correlat…
BKT-paired phase in coupled XY models
Giacomo Bighin, Nicolò Defenu, István Nándori +2
We study the effect of a linear tunneling coupling between 2D systems, each separately exhibiting the topological Berezinskii-Kosterlitz-Thouless (BKT) transition. In the uncoupled…
Far-from-equilibrium dynamics of angular momentum in a quantum many-particle system
Igor N. Cherepanov, Giacomo Bighin, Lars Christiansen +4
We use laser-induced rotation of single molecules embedded in superfluid helium nanodroplets to reveal angular momentum dynamics and transfer in a controlled setting, under far-fro…
Detecting composite orders in layered models via machine learning
W. Rzadkowski, N. Defenu, S. Chiacchiera +2
Determining the phase diagram of systems consisting of smaller subsystems 'connected' via a tunable coupling is a challenging task relevant for a variety of physical settings. A ge…
Variational approaches to quantum impurities: from the Fröhlich polaron to the angulon
Xiang Li, Giacomo Bighin, Enderalp Yakaboylu +1
Problems involving quantum impurities, in which one or a few particles are interacting with a macroscopic environment, represent a pervasive paradigm, spanning across atomic, molec…
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…