86 citations · 531 across the 35 of their papers we have counts for
14 papers · 1 filter
An analytical approach to symmetry breaking in multipole RF-traps
Marylise Marchenay, Jofre Pedregosa-Gutierrez, Martina Knoop +2
Radio-frequency linear multipole traps have been shown to be very sensitive to mis-positioning of their electrodes, which results in a symmetry breaking and leads to extra local mi…
Experimental Demonstration of a Terahertz Frequency Reference based on Coherent Population Trapping
Mathieu Collombon, Cyril Chatou, Gaétan Hagel +4
A novel protocol of interrogation based on coherent population trapping in an N-level scheme atomic system leads to dark resonances involving three different photons. An ensemble o…
Conditions for anti-Zeno effect observation in free-space atomic radiative decay
Emmanuel Lassalle, Caroline Champenois, Brian Stout +2
Frequent measurements can modify the decay of an unstable quantum state with respect to the free dynamics given by Fermi's golden rule. In a landmark article, Nature 405, 546 (2000…
Experimental demonstration of an efficient number diagnostic for long 1D ion chains
Marius Romuald Kamsap, Caroline Champenois, J. Pedregosa-Gutierrez +2
Very long, one-dimensional (1D) ion chains are the basis for many applications, in particular in quantum information processing and reliable diagnostics are needed to quantify them…
Coherent internal state transfer by three-photon STIRAP-like scheme for many-atom samples
Marius Romuald Kamsap, Thierry Blanchard Ekogo, Jofre Pedregosa-Gutierrez +5
A STIRAP-like scheme is proposed to exploit a three-photon resonance taking place in alkaline-earth-metal ions. This scheme is designed for state transfer between the two fine stru…
An ion ring in a linear multipole trap for optical frequency metrology
Caroline Champenois, Mathieu Marciante, Jofre Pedregosa-Guttierez +3
A ring crystal of ions trapped in a linear multipole trap is studied as a basis for an optical frequency standard. The equilibrium conditions and cooling possibilities are discusse…
About the dynamics and thermodynamics of trapped ions
Caroline Champenois
This tutorial introduces the dynamics of charged particles in a radiofrequency trap in a very general manner to point out the differences between the dynamics in a quadrupole and i…
Index of refraction of gases for matter waves: effect of the motion of the gas particles on the calculation of the index
Caroline Champenois, Marion Jacquey, Steven Lepoutre +3
Two different formulae relating the index of refraction of gases for atom waves to the scattering amplitude have been published. We show here that these two formulae are not co…
Two-step Doppler cooling of a three-level ladder system with an intermediate metastable level
Caroline Champenois, Gaetan Hagel, Martina Knoop +4
Doppler laser cooling of a three-level ladder system using two near-resonant laser fields is analyzed in the case of the intermediate level being metastable while the upper level i…
Doppler cooling of calcium ions using a dipole-forbidden transition
R. J. Hendricks, J. L. Sørensen, C. Champenois +2
Doppler cooling of calcium ions has been experimentally demonstrated using the S1/2 to D5/2 dipole-forbidden transition. Scattering forces and fluorescence levels a factor of 5 sma…
Terahertz frequency standard based on three-photon coherent population trapping
Caroline Champenois, Gaetan Hagel, Marie Houssin +3
A scheme for a THz frequency standard based on three-photon coherent population trapping in stored ions is proposed. Assuming the propagation directions of the three lasers obey th…
Quantum coherence and population trapping in three-photon processes
Caroline Champenois, Giovanna Morigi, Juergen Eschner
The spectroscopic properties of a single, tightly trapped atom are studied, when the electronic levels are coupled by three laser fields in an -shaped configuration of levels, w…
Diffraction phases in atom interferometers
Caroline Champenois, Matthias Buchner, Remi Delhuille +3
Diffraction of atoms by laser is a very important tool for matter wave optics. Although this process is well understood, the phase shifts induced by this diffraction process are no…
High contrast Mach-Zehnder lithium atom interferometer in the Bragg regime
R. Delhuille, C. Champenois, M. Buchner +4
We have constructed an atom interferometer of the Mach-Zehnder type, operating with a supersonic beam of lithium. Atom diffraction uses Bragg diffraction on laser standing waves. W…