Jean Claude Garreau
YOU?
Author Swipe
View article: Observation of quantum criticality of a four-dimensional phase transition
Observation of quantum criticality of a four-dimensional phase transition Open
Understanding how a system’s behavior extrapolates beyond 3D is a fundamental question in physics, spanning topics from unification theories to critical phenomena. In statistical physics, fluctuations’ strength is highly sensitive to dimen…
View article: Numerical study of the Gross-Pitaevskii equation on a two-dimensional ring and vortex nucleation
Numerical study of the Gross-Pitaevskii equation on a two-dimensional ring and vortex nucleation Open
We consider the Gross-Pitaevskii equation with a confining ring potential with a Gaussian profile. By introducing a rotating sinusoidal perturbation, we numerically highlight the nucleation of quantum vortices in a particular regime throug…
View article: Exploring quantum criticality in a 4D quantum disordered system
Exploring quantum criticality in a 4D quantum disordered system Open
Phase transitions are prevalent throughout physics, spanning thermal phenomena like water boiling to magnetic transitions in solids. They encompass cosmological phase transitions in the early universe and the transition into a quark-gluon …
View article: Correction: Localization properties of the asymptotic density distribution of a one-dimensional disordered system
Correction: Localization properties of the asymptotic density distribution of a one-dimensional disordered system Open
International audience
View article: Localization properties of the asymptotic density distribution of a one-dimensional disordered system
Localization properties of the asymptotic density distribution of a one-dimensional disordered system Open
Anderson localization is the ubiquitous phenomenon of inhibition of transport of classical and quantum waves in a disordered medium. In dimension one, it is well known that all states are localized, implying that the distribution of an ini…
View article: Multi-frequency telecom fibered laser system for potassium laser cooling
Multi-frequency telecom fibered laser system for potassium laser cooling Open
We describe a compact and versatile multi-frequency laser system for laser-cooling potassium atoms by frequency doubling a fiber-optic telecom beam (≃1534 or 1540 nm). Low-power fiber-based telecom lasers and components generate a single b…
View article: Synthesizing arbitrary dispersion relations in a modulated tilted optical lattice
Synthesizing arbitrary dispersion relations in a modulated tilted optical lattice Open
Dispersion relations are fundamental characteristics of the dynamics of quantum and wave systems. In this work we introduce a simple technique to generate arbitrary dispersion relations in a modulated tilted lattice. The technique is illus…
View article: Bogoliubov excitations in the quasiperiodic kicked rotor: Stability of a kicked condensate and the quasi–insulator-to-metal transition
Bogoliubov excitations in the quasiperiodic kicked rotor: Stability of a kicked condensate and the quasi–insulator-to-metal transition Open
International audience
View article: Dynamics of the mean-field-interacting quantum kicked rotor
Dynamics of the mean-field-interacting quantum kicked rotor Open
We study the dynamics of the many-body atomic kicked rotor with interactions\nat the mean-field level, governed by the Gross-Pitaevskii equation. We show\nthat dynamical localization is destroyed by the interaction, and replaced by a\nsubd…
View article: Analog quantum simulation of the spinor-four Dirac equation with an\n artificial gauge field
Analog quantum simulation of the spinor-four Dirac equation with an\n artificial gauge field Open
A two-dimensional spatially and temporally modulated Wannier-Stark system of\nultracold atoms in optical lattices is shown to mimic the behavior of a Dirac\nparticle. Suitable additional modulations generate an artificial gauge field\nwhic…
View article: Experimental realization of an ideal Floquet disordered system
Experimental realization of an ideal Floquet disordered system Open
The atomic Quantum Kicked Rotor is an outstanding "quantum simulator" for the\nexploration of transport in disordered quantum systems. Here we study\nexperimentally the phase-shifted quantum kicked rotor, which we show to display\nproperti…
View article: Experimental Observation of a Time-Driven Phase Transition in Quantum Chaos
Experimental Observation of a Time-Driven Phase Transition in Quantum Chaos Open
We report the first experimental observation of the time-driven phase transition in a canonical quantum chaotic system, the quantum kicked rotor. The transition bears a firm analogy to a thermodynamic phase transition, with the time mimick…
View article: Ratchet effect in the quantum kicked rotor and its destruction by dynamical localization
Ratchet effect in the quantum kicked rotor and its destruction by dynamical localization Open
v1: 5 pages, 3 figures; v2: published version, title, abstract and introduction changed
View article: Controlling symmetry and localization with an artificial gauge field in a disordered quantum system
Controlling symmetry and localization with an artificial gauge field in a disordered quantum system Open
View article: Simulating Dirac models with ultracold atoms in optical lattices
Simulating Dirac models with ultracold atoms in optical lattices Open
We present a general model allowing "quantum simulation" of one-dimensional\nDirac models with 2- and 4-component spinors using ultracold atoms in driven 1D\ntilted optical latices. The resulting Dirac physics is illustrated by one of\nits…
View article: Return to the Origin as a Probe of Atomic Phase Coherence
Return to the Origin as a Probe of Atomic Phase Coherence Open
We report on the observation of the coherent enhancement of the return probability ["enhanced return to the origin" (ERO)] in a periodically kicked cold-atom gas. By submitting an atomic wave packet to a pulsed, periodically shifted, laser…
View article: Quantum simulation of disordered systems with cold atoms
Quantum simulation of disordered systems with cold atoms Open
This paper reviews the physics of quantum disorder in relation with a series of experiments using laser-cooled atoms exposed to “kicks” of a standing wave, realizing a paradigmatic model of quantum chaos, the kicked rotor. This dynamical s…
View article: Experimental Observation of Two-Dimensional Anderson Localization with the Atomic Kicked Rotor
Experimental Observation of Two-Dimensional Anderson Localization with the Atomic Kicked Rotor Open
Dimension 2 is expected to be the lower critical dimension for Anderson localization in a time-reversal-invariant disordered quantum system. Using an atomic quasiperiodic kicked rotor-equivalent to a two-dimensional Anderson-like model-we …
View article: Emergence of nonlinear behavior in the dynamics of ultracold bosons
Emergence of nonlinear behavior in the dynamics of ultracold bosons Open
International audience