Results
repositories = "HAL - Hyper Article on Line"
> : "Physical Review A: Atomic, Molecular and Optical Physics"
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Quantum feedback by discrete quantum nondemolition measurements: Towards on-demand generation of photon-number states
Author(s) :
Dotsenko, Igor
,
Mirrahimi, Mazyar
,
Brune, Michel
,
Haroche, Serge
,
Raimond, Jean-Michel
,
Rouchon, Pierre
Description :
We propose a quantum feedback scheme for the preparation and protection of photon-number states of light trapped in a high-Q microwave cavity. A quantum nondemolition measurement of the cavity field provides information on the photon-number distribution. The feedback loop is closed by injecting into...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Quantum intensity noise of laser diodes and nonorthogonal spatial eigenmodes
Description :
Laser systems with nonorthogonal eigenmodes have a linewidth that is broader than the usual Schawlow- Townes value, by a factor that is known as the Petermann excess noise factor. In a recent quantum analysis, this excess noise was attributed to loss-induced coupling betwen the laser modes. Using th...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Measurement of the atom number distribution in an optical tweezer using single-photon counting
Description :
We demonstrate in this paper a method to reconstruct the atom number distribution of a cloud containing a few tens of cold atoms. The atoms are first loaded from a magneto-optical trap into a microscopic optical dipole trap and then released in a resonant light probe where they undergo a Brownian mo...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Unusual stability of a one-parameter family of dissipative solitons due to spectral filtering and nonlinearity saturation
Description :
The stability of a one-parameter family of dissipative solitons seen in the cubic-quintic complex Ginzburg-Landau equation is studied. It is found that an unusually strong stability occurs for solitons controlled by the spectral filtering and nonlinearity saturation simultaneously, consistently with...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Dark propagation modes in optical lattices
Author(s) :
Schiavoni, Michele
,
Sanchez-Palencia, Laurent
,
Carminati, Francois-Regis
,
Renzoni, Ferruccio
,
Grynberg, Gilbert
Description :
We examine the stimulated light scattering onto the propagation modes of a dissipative optical lattice. We show that two different pump-probe configurations may lead to the excitation, via different mechanisms, of the same mode. We found that in one configuration the scattering on the propagation mo...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Non-Gaussian Velocity Distributions in Optical Lattices
Author(s) :
Jersblad, Johan
,
Ellmann, Harald
,
Stöchkel, Kristian
,
Kastberg, Anders
,
Sanchez-Palencia, Laurent
,
Kaiser, Robin
Description :
We present a detailed experimental study of the velocity distribution of atoms cooled in an optical lattice. Our results are supported by full-quantum numerical simulations. Even though the Sisyphus effect, the responsible cooling mechanism, has been used extensively in many cold atom experiments, n...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Solitonic transmission of Bose-Einstein matter waves
Description :
We consider a continuous atom laser propagating through a wave guide with a constriction. Two different types of transmittedstationary flow coexist. The first one coincides, at low incident current, with the non-interacting flow. As the incident flux increases, the repulsive interactions decrease th...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
One particle in a box: the simplest model for a Fermigas in the unitary limit
Description :
We consider a single quantum particle in a spherical box interacting with a fixed scatterer at the center, to construct a model of a degenerate atomic Fermi gas close to a Feshbach resonance. One of the key predictions of the model is the existence of two branches for the macroscopic state of the ga...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Variational approach for the two-dimensional trapped Bose Einstein condensate
Author(s) :
Pricoupenko, Ludovic
Description :
We construct a many-body Gaussian variational approach for the two-dimensional trapped Bose gas in the condensate phase. Interaction between particles is modelized by a generalized pseudo-potential of zero range that allows recovering perturbative results in the ultra-dilute limit, while back action...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Synchronization of Hamiltonian motion and dissipative effects in optical lattices: Evidence for a stochastic resonance
Description :
We theoretically study the influence of the noise strength on the excitation of the Brillouin propagation modes in a dissipative optical lattice. We show thatthe excitation has a resonant behavior for a specific amount of noise corresponding to the precise synchronization of the Hamiltonian motion o...
Repository :
HAL - Hyper Article on Line
Language(s) :
English