Return to the Origin as a Probe of Atomic Phase Coherence

Abstract

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 standing wave, we induce an oscillation of ERO in time and explain it in terms of a periodic, reversible dephasing in the weak-localization interference sequences responsible for ERO. Monitoring the temporal decay of ERO, we exploit its quantum coherent nature to quantify the decoherence rate of the atomic system.

References in corpus (7)

• Observation of many-body localization of interacting fermions in a quasi-random optical lattice
• Direct observation of Anderson localization of matter-waves in a controlled disorder
• Experimental Observation of Two-Dimensional Anderson Localization with the Atomic Kicked Rotor
• Coherent Backscattering of Ultracold Atoms
• Coherent backscattering of Bose-Einstein condensates in two-dimensional disorder potentials
• Light transport in cold atoms and thermal decoherence
• Ergodic vs diffusive decoherence in mesoscopic devices

Cited by in corpus (17)

• Controlling symmetry and localization with an artificial gauge field in a disordered quantum system
• Quantum simulation of disordered systems with cold atoms
• Observation of the Quantum Boomerang Effect
• Ratchet Effect in the Quantum Kicked Rotor and its Destruction by Dynamical Localization
• Coherent multiple scattering of out-of-equilibrium interacting Bose gases
• Experimental observation of time singularity in classical-to-quantum chaos transition
• Multifractality of the kicked rotor at the critical point of the Anderson transition
• Coherent back and forward scattering peaks in the quantum kicked rotor
• Quench dynamics of a weakly interacting disordered Bose gas in momentum space
• Experimental realization of an ideal Floquet disordered system
• Critical dynamics of long-range quantum disordered systems
• Subdiffusion in wave packets with periodically kicked interactions
• Low-energy prethermal phase and crossover to thermalization in nonlinear kicked rotors
• Localization properties of the asymptotic density distribution of a one-dimensional disordered system
• Berezinskii approach to disordered spin systems with asymmetric scattering and application to the quantum boomerang effect
• Mesoscopic scattering dynamics under generic uniform SU(2) gauge fields: Spin-momentum relaxation and coherent backscattering
• Momentum Signatures of Site Percolation in Disordered 2D Ferromagnets