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- Max F Riedel, Pascal Böhi, Yun Li, Theodor W Hänsch, Alice Sinatra, Philipp Treutlein
- Nature
- 2010

Atom chips provide a versatile quantum laboratory for experiments with ultracold atomic gases. They have been used in diverse experiments involving low-dimensional quantum gases, cavity quantum electrodynamics, atom-surface interactions, and chip-based atomic clocks and interferometers. However, a severe limitation of atom chips is that techniques to… (More)

- Yun Li, P. Treutlein, A. Sinatra
- 2008

We propose an analytical method to study the entangled spatial and spin dynamics of interacting bimodal Bose-Einstein condensates. We show that at particular times during the evolution spatial and spin dynamics disentangle and the spin squeezing can be predicted by a simple two-mode model. We calculate the maximum spin squeezing achievable in experimentally… (More)

The problem of spin squeezing with a bimodal condensate in the presence of particle losses is solved analytically by the Monte Carlo wave function method. We find the largest obtainable spin squeezing as a function of the one-body loss rate, the two-body and three-body rate constants, and the s-wave scattering length.

- A Chiarini, S Arista, A Giammanco, A Sinatra
- The Journal of general virology
- 1983

The Lincoln strain of bovine rotavirus, cytocidal for bovine AU-BEK cells, can establish in the same cell cultures in the presence of foetal calf serum (FCS) a persistent infection that depends on selection of highly resistant cells. In fact, after the induction of the carrier state only a small fraction of the cell population was infected. The parental and… (More)

- R Di Stefano, G Burgio, P Ammatuna, A Sinatra, A Chiarini
- Giornale di batteriologia, virologia ed…
- 1976

Three plaque-purified measles virus clones exhibited remarkable differences in their kinetics of inactivation only after heating at 45 degrees C and none after UV-irradiation. A hypothesis is discussed of the possible dependence, in fast inactivating populations, of thermolability on a relative incompleteness of the virions.

- Carlos Lobo, Alice Sinatra, Yvan Castin
- Physical review letters
- 2004

We show that the formation of a vortex lattice in a weakly interacting Bose condensed gas can be modeled with the nonlinear Schrödinger equation for both T=0 and finite temperatures without the need for an explicit damping term. Applying a weak rotating anisotropic harmonic potential, we find numerically that the turbulent dynamics of the field produces an… (More)

- Kenneth Maussang, G Edward Marti, +6 authors Jakob Reichel
- Physical review letters
- 2010

We measure atom number statistics after splitting a gas of ultracold 87Rb atoms in a purely magnetic double-well potential created on an atom chip. Well below the critical temperature for Bose-Einstein condensation Tc, we observe reduced fluctuations down to -4.9 dB below the atom shot noise level. Fluctuations rise to more than +3.8 dB close to Tc, before… (More)

- A Dantan, G Reinaudi, A Sinatra, F Laloë, E Giacobino, M Pinard
- Physical review letters
- 2005

We propose to store nonclassical states of light into the macroscopic collective nuclear spin (10(18) atoms) of a 3He vapor, using metastability exchange collisions. These collisions, commonly used to transfer orientation from the metastable state 2 3S1 to the ground state of 3He, can also transfer quantum correlations. This gives a possible experimental… (More)

We propose a method to study the time evolution of Bose-Einstein condensed gases perturbed from an initial thermal equilibrium, based on the Wigner representation of the N-body density operator. We show how to generate a collection of random classical fields sampling the initial Wigner distribution in the number conserving Bogoliubov approximation. The… (More)

- M Abboud, A Sinatra, X Maˆıtre, G Tastevin, P.-J Nacher
- 2004

Metastability exchange optical pumping of helium-3 is performed in a strong magnetic field of 1.5 T. The achieved nuclear polarizations, between 80% at 1.33 mbar and 25% at 67 mbar, show a substantial improvement at high pressures with respect to standard low-field optical pumping. The specific mechanisms of metastability exchange optical pumping at high… (More)