881 citations · 2.4k across the 44 of their papers we have counts for
13 papers · 1 filter
Scaling laws for the sensitivity enhancement of non-Gaussian spin states
Y. Baamara, A. Sinatra, M. Gessner
We identify the large- scaling of the metrological quantum gain offered by over-squeezed spin states that are accessible by one-axis-twisting, as a function of the preparation t…
Nuclear spin squeezing in Helium-3 by continuous quantum nondemolition measurement
Alan Serafin, Matteo Fadel, Philipp Treutlein +1
We propose a technique to control the macroscopic collective nuclear spin of a Helium-3 vapor in the quantum regime using light. The scheme relies on metastability exchange collisi…
Observing spin-squeezed states under spin-exchange collisions for a second
Meng-Zi Huang, Jose Alberto de la Paz, Tommaso Mazzoni +5
Using the platform of a trapped-atom clock on a chip, we observe the time evolution of spin-squeezed hyperfine clock states in ultracold rubidium atoms on previously inaccessible t…
Spin-squeezed atomic crystal
Dariusz Kajtoch, Emilia Witkowska, Alice Sinatra
We propose a method to obtain a regular arrangement of two-level atoms in a three-dimensional optical lattice with unit filling, where all the atoms share internal state coherence…
EPR-entangled Bose-Einstein condensates in state-dependent potentials: a dynamical study
Hadrien Kurkjian, Krzysztof Pawlowski, Alice Sinatra
We study generation of non-local correlations by atomic interactions in a pair of bi-modal Bose-Einstein Condensates in state-dependent potentials including spatial dynamics. The w…
Limits of atomic entanglement by cavity-feedback : from weak to strong coupling
Krzysztof Pawlowski, Jérôme Estève, Jakob Reichel +1
We theoretically investigate the entangled states of an atomic ensemble that can be obtained via cavity-feedback, varying the atom-light coupling from weak to strong, and including…
Limit of spin squeezing in trapped Bose-Einstein condensates
Alice Sinatra, Yvan Castin, Emilia Witkowska
The evolution of an interacting two-component Bose-Einstein condensate from an initial phase state leads to a spin squeezed state that may be used in atomic clocks to increase the…
Spin Squeezing in Finite Temperature Bose-Einstein Condensates : Scaling with the system size
Alice Sinatra, Emilia Witkowska, Yvan Castin
We perform a multimode treatment of spin squeezing induced by interactions in atomic condensates, and we show that, at finite temperature, the maximum spin squeezing has a finite l…
Enhanced and reduced atom number fluctuations in a BEC splitter
Kenneth Maussang, G. Edward Marti, Tobias Schneider +6
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 temperat…
Atom chip based generation of entanglement for quantum metrology
Max F. Riedel, Pascal Böhi, Yun Li +3
Atom chips provide a versatile `quantum laboratory on a microchip' for experiments with ultracold atomic gases. They have been used in experiments on diverse topics such as low-dim…
Optimum spin-squeezing in Bose-Einstein condensates with particle losses
Yun Li, Yvan Castin, Alice Sinatra
The problem of spin squeezing with a bimodal condensate in presence of particle losses is solved analytically by the Monte Carlo wavefunction method. We find the largest obtainable…
Quantum correlations of two optical fields close to electromagnetically induced transparency
Alice Sinatra
We show that three-level atoms excited by two cavity modes in a configuration close to electromagnetically induced transparency can produce strongly squeezed bright beams or co…
Long-lived quantum memory with nuclear atomic spins
Aurelien Dantan, Gael Reinaudi, Alice Sinatra +3
We propose to store non-classical states of light into the macroscopic collective nuclear spin ( atoms) of a He vapor, using metastability exchange collisions. These c…