Publications (20)
Resonant excitations of a Bose Einstein condensate in an optical lattice
C. Cabrera-Gutiérrez, E. Michon, M. Arnal +4
We investigate experimentally a Bose Einstein condensate placed in a 1D optical lattice whose phase or amplitude is modulated in a frequency range resonant with the first bands of…
Ultrarobust calibration of an optical lattice depth based on a phase shift
C. Cabrera-Gutiérrez, E. Michon, V. Brunaud +5
We report on a new method to calibrate the depth of an optical lattice. It consists in triggering the intrasite dipole mode of the cloud by a sudden phase shift. The corresponding…
Spectroscopy of a narrow-line optical pumping transition in dysprosium
M. Schmitt, E. A. L. Henn, J. Billy +4
We present measurements of the hyperfine coefficients and isotope shifts of the Dy I nm transition, using saturated absorption spectroscopy on an atomic beam. A King Plot…
Fast phase-modulated optical lattice for wave packet engineering
C. Cabrera-Gutiérrez, A. Fortun, E. Michon +4
We investigate experimentally a Bose Einstein condensate placed in a 1D optical lattice whose phase is modulated at a frequency large compared to all characteristic frequencies. As…
Dipolar Stabilization of an Attractive Bose Gas in a One Dimensional Lattice
S. Müller, J. Billy, E. A. L. Henn +5
We experimentally show that dipolar interaction can stabilize otherwise unstable many-body systems like an attractive Bose gas. In a one dimensional lattice the repulsive dipolar o…
A regular Hamiltonian halting ratchet for matter wave transport
N. Dupont, L. Gabardos, F. Arrouas +4
We report on the design of a Hamiltonian ratchet exploiting periodically at rest integrable trajectories in the phase space of a modulated periodic potential, leading to the linear…
Out-of-equilibrium dynamics of a Bose Einstein condensate in a periodically driven band system
E. Michon, C. Cabrera-Gutierrez, A. Fortun +7
We report on the out-of-equilibrium dynamics of a Bose-Einstein condensate (BEC) placed in an optical lattice whose phase is suddenly modulated. The frequency and the amplitude of…
Direct tunneling delay time measurement in an optical lattice
A. Fortun, C. Cabrera-Gutiérrez, G. Condon +3
We report on the measurement of the time required for a wave packet to tunnel through the potential barriers of an optical lattice. The experiment is carried out by loading adiabat…
Phase space manipulations of many-body wavefunctions
G. Condon, A. Fortun, J. Billy +1
We explore the manipulation in phase space of many-body wavefunctions that exhibit self-similar dynamics, under the application of sudden force and/or in the presence of a constant…
Beyond effective Hamiltonians: micromotion of Bose Einstein condensates in periodically driven optical lattices
M. Arnal, G. Chatelain, C. Cabrera-Gutiérrez +5
We investigate a Bose Einstein condensate held in a 1D optical lattice whose phase undergoes a fast oscillation using a statistical analysis. The averaged potential experienced by…
Band gap structures for matter waves
F. Damon, G. Condon, P. Cheiney +4
Spatial gaps correspond to the projection in position space of the gaps of a periodic structure whose envelope varies spatially. They can be easily generated in cold atomic physics…
Quantum state control of a Bose-Einstein condensate in an optical lattice
N. Dupont, G. Chatelain, L. Gabardos +5
We report on the efficient design of quantum optimal control protocols to manipulate the motional states of an atomic Bose-Einstein condensate (BEC) in a one-dimensional optical la…
Routes towards the experimental observation of the large fluctuations due to chaos assisted tunneling effects with cold atoms
R. Dubertrand, J. Billy, D. Guéry-Odelin +2
In the presence of a complex classical dynamics associated with a mixed phase space, a quantum wave function can tunnel between two stable islands through the chaotic sea, an effec…
Direct cooling in an optical lattice by amplitude modulation
M. Arnal, V. Brunaud, G. Chatelain +5
We report on a generic cooling technique for atoms trapped in optical lattices. It consists in modulating the lattice depth with a proper frequency sweeping. This filtering techniq…
Phase-space distributions of Bose-Einstein condensates in an optical lattice: Optimal shaping and reconstruction
N. Dupont, F. Arrouas, L. Gabardos +5
We apply quantum optimal control to shape the phase-space distribution of Bose-Einstein condensates in a one-dimensional optical lattice. By a time-dependent modulation of the latt…
Observation and control of quantized scattering halos
G. Chatelain, N. Dupont, M. Arnal +5
We investigate the production of s-wave scattering halos from collisions between the momentum components of a Bose-Einstein condensate released from an optical lattice. The lattice…
Guided atom laser : a new tool for guided atom optics
J. Billy, V. Josse, Z. Zuo +3
We present a guided atom laser. A Bose-Einstein condensate (BEC) is created in a crossed hybrid magnetic and an elongated optical trap, which acts as a matterwave guide. Atoms are…
Confinement-induced collapse of a dipolar Bose-Einstein condensate
J. Billy, E. A. L. Henn, S. Müller +6
We report on the observation of the confinement-induced collapse dynamics of a dipolar Bose-Einstein condensate (dBEC) in a one-dimensional optical lattice. We show that for a fixe…
Probing non-ergodicity and symmetry via coherent forward scattering in a shaken rotor
F. Arrouas, J. Hébraud, N. Ombredane +9
The Coherent Backscattering (CBS) peak is a well-known interferential signature of weak localization in disordered or chaotic systems. More recently, a second interference feature…
Chaos-assisted tunneling resonances in a synthetic Floquet superlattice
M. Arnal, G. Chatelain, M. Martinez +7
The field of quantum simulation, which aims at using a tunable quantum system to simulate another, has been developing fast in the past years as an alternative to the all-purpose q…