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- Y Castin, R Dum, E Mandonnet, A Minguzzi, I Carusotto
- 2000

We investigate the coherence properties of an atomic beam evaporatively cooled in a magnetic guide, assuming thermal equilibrium in the quantum degenerate regime. The gas experiences two-dimensional, transverse Bose-Einstein condensation rather than a full three-dimensional condensation because of the very elongated geometry of the magnetic guide. First… (More)

- Tung-Lam Dao, Antoine Georges, Jean Dalibard, Christophe Salomon, Iacopo Carusotto
- Physical review letters
- 2007

We propose a Raman spectroscopy technique which is able to probe the one-particle Green function, the Fermi surface, and the quasiparticles of a gas of strongly interacting ultracold atoms. We give quantitative examples of experimentally accessible spectra. The efficiency of the method is validated by means of simulated images for the case of a usual Fermi… (More)

A quantum fluid passing an obstacle behaves differently from a classical one. When the flow is slow enough, the quantum gas enters a superfluid regime, and neither whirlpools nor waves form around the obstacle. For higher flow velocities, it has been predicted that the perturbation induced by the defect gives rise to the turbulent emission of quantized… (More)

- I Carusotto, D Gerace, H E Tureci, S De Liberato, C Ciuti, A Imamoglu
- Physical review letters
- 2009

We theoretically investigate the optical response of a one-dimensional array of strongly nonlinear optical microcavities. When the optical nonlinearity is much larger than both losses and intercavity tunnel coupling, the nonequilibrium steady state of the system is reminiscent of a strongly correlated Tonks-Girardeau gas of impenetrable bosons. Signatures… (More)

- Iacopo Carusotto, Serena Fagnocchi, Alessio Recati, Roberto Balbinot, Alessandro Fabbri
- 2008

We report numerical evidence of Hawking emission of Bogoliubov phonons from a sonic horizon in a flowing one-dimensional atomic Bose-Einstein condensate. The presence of Hawking radiation is revealed from peculiar long-range patterns in the density-density correlation function of the gas. Quantitative agreement between our fully microscopic calculations and… (More)

We study the electromagnetic force exerted on a pair of parallel slab waveguides by the light propagating through them. The dependence of the force on the separation of the slabs is calculated by means of the Maxwell–Stress tensor formalism and its main features are discussed for the different modes of the radiation. Spatially symmetric (antisymmetric)… (More)

- A Högele, M Kroner, +4 authors A Imamoglu
- Physical review letters
- 2012

Resonant optical excitation of lowest-energy excitonic transitions in self-assembled quantum dots leads to nuclear spin polarization that is qualitatively different from the well-known optical orientation phenomena. By carrying out a comprehensive set of experiments, we demonstrate that nuclear spin polarization manifests itself in quantum dots subjected to… (More)

- I Carusotto, Y Castin, J Dalibard
- 2000

We present a numerically tractable method to solve exactly the evolution of a N boson system with binary interactions. The density operator of the system ρ is obtained as the stochastic average of particular operators |Ψ 1 Ψ 2 | of the system. The states |Ψ 1,2 are either Fock states |N : φ 1,2 or coherent states |coh : φ 1,2 with each particle in the state… (More)

- A. Tomadin, V. Giovannetti, +4 authors A. Imamoglu
- 2010

We analyze the nonequilibrium dynamics of a gas of interacting photons in an array of coupled dissipative nonlinear cavities when driven by a pulsed external coherent field. Using a mean-field approach, we show that the response of the system is strongly sensitive to the underlying (equilibrium) quantum phase transition from a Mott insulator to a superfluid… (More)

We have investigated the superfluid properties of a ring of weakly interacting and degenerate 1D Bose gas at thermal equilibrium with a rotating vessel. The conventional definition of superfluidity predicts that the gas has a significant superfluid fraction only in the Bose condensed regime. In the opposite regime, it is found that a superfluid behaviour… (More)