Theory of Bose-Einstein condensation in trapped gases
- F. Dalfovo, S. Giorgini, L.P.Pitaevskii, S.Stringari
- Physics
- 3 June 1998
The phenomenon of Bose-Einstein condensation of dilute gases in traps is reviewed from a theoretical perspective. Mean-field theory provides a framework to understand the main features of the…
Theory of ultracold atomic Fermi gases
- S. Giorgini, L. Pitaevskiĭ, S. Stringari
- Physics
- 22 June 2007
The physics of quantum degenerate atomic Fermi gases in uniform as well as in harmonically trapped configurations is reviewed from a theoretical perspective. Emphasis is given to the effect of…
Phase separation in a polarized Fermi gas at zero temperature.
- S. Pilati, S. Giorgini
- PhysicsPhysical Review Letters
- 8 October 2007
This work investigates the phase diagram of asymmetric two-component Fermi gases at zero temperature as a function of polarization and interaction strength and finds three different mixed states, where the superfluid and the normal phase coexist in equilibrium.
Impurity in a Bose-Einstein condensate: Study of the attractive and repulsive branch using quantum Monte Carlo methods
- L. A. P. Ardila, S. Giorgini
- Physics
- 27 July 2015
We investigate the properties of an impurity immersed in a dilute Bose gas at zero temperature using quantum Monte-Carlo methods. The interactions between bosons are modeled by a hard sphere…
BCS-BEC crossover in a two-dimensional Fermi gas.
- G. Bertaina, S. Giorgini
- PhysicsPhysical Review Letters
- 16 November 2010
We investigate the crossover from Bardeen-Cooper-Schrieffer (BCS) superfluidity to Bose-Einstein condensation (BEC) in a two-dimensional Fermi gas at T=0 using the fixed-node diffusion Monte Carlo…
Normal state of a polarized fermi gas at unitarity.
- C. Lobo, A. Recati, S. Giorgini, S. Stringari
- PhysicsPhysical Review Letters
- 27 July 2006
A first order phase transition from normal to superfluid at x(c)=0.44 corresponding, in the presence of harmonic trapping, to a critical polarization P(c)=(N upward arrow - N downward arrow/(N downward arrow + N upward arrow)=77%.
Itinerant ferromagnetism of a repulsive atomic Fermi gas: a quantum monte carlo study.
- S. Pilati, G. Bertaina, S. Giorgini, M. Troyer
- PhysicsPhysical Review Letters
- 7 April 2010
The phase diagram of a two-component repulsive Fermi gas at T=0 is investigated by means of quantum Monte Carlo simulations and the energy of the strongly polarized gas is calculated and parametrized in terms of the physical properties of repulsive polarons, which are relevant for the stability of the fully ferromagnetic state.
Beyond the Tonks-Girardeau gas: strongly correlated regime in quasi-one-dimensional Bose gases.
- G. Astrakharchik, J. Boronat, J. Casulleras, S. Giorgini
- PhysicsPhysical Review Letters
- 11 May 2004
The behavior of the correlation functions and of the frequency of the lowest breathing mode for harmonically trapped systems shows that the gas is more strongly correlated than in the Tonks-Girardeau regime.
Thermodynamics of a trapped Bose-condensed gas
- S. Giorgini, L. Pitaevskiĭ, S. Stringari
- Physics
- 2 April 1997
We investigate the thermodynamic behaviour of a Bose gas interacting with repulsive forces and confined in a harmonic anisotropic trap. We develop the formalism of mean field theory for non uniform…
Fermi-liquid behavior of the normal phase of a strongly interacting gas of cold atoms.
- S. Nascimbene, N. Navon, C. Salomon
- PhysicsPhysical Review Letters
- 21 December 2010
The magnetic susceptibility of a Fermi gas with tunable interactions in the low-temperature limit is measured and quantum Monte Carlo calculations are compared to shed new light on the nature of the excitations of the normal phase of a strongly interacting Fermani gas.
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