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- Centre National de la Recherche ScientifiqueFR134 papers
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62 papers · 1 filter
Spatial multimode entanglement within one laser beam
J. Janousek, K. Wagner, J-F. Morizur +4
Optical entanglement is a key requirement for many quantum communication protocols. Conventionally entanglement is formed between two distinct beams, with the quantum correlations…
Observation of Superfluidity of Polaritons in Semiconductor Microcavities
A. Amo, J. Lefrere, S. Pigeon +6
One of the most striking manifestations of quantum coherence in interacting boson systems is superfluidity. Exciton-polaritons in semiconductor microcavities are two-dimensional co…
Quantum limits in the measurement of very small displacements in optical images
Claude Fabre, J. -B. Fouet, Agnès Maître
We consider the problem of the measurement of very small displacements in the transverse plane of an optical image with a split photodetector. We show that the standard quantum lim…
Vacuum squeezed light for atomic memories at the D2 cesium line
Sidney Burks, Jérémie Ortalo, Antonino Chiummo +5
We report the experimental generation of squeezed light at 852 nm, locked on the Cesium D2 line. 50% of noise reduction down to 50 kHz has been obtained with a doubly resonant opti…
Relativistic corrections of mα^6(m/M) order to the hyperfine structure of the H_2^+ molecular ion
V. I. Korobov, L. Hilico, J. -Ph. Karr
The mα^6(m/M) order corrections to the hyperfine splitting in the H_2^+ ion are calculated. That allows to reduce uncertainty in the frequency intervals between hyperfine sublevels…
Practical scheme for a light-induced gauge field in an atomic Bose gas
Kenneth J. Günter, Marc Cheneau, Tarik Yefsah +2
We propose a scheme to generate an Abelian gauge field in an atomic gas using two crossed laser beams. If the internal atomic state follows adiabatically the eigenstates of the ato…