2006/03/08 by Sandro Wimberger, Andreas Buchleitner · 1 citation
Physics and Astronomy · #Atom (system on chip) #Cold Atom Physics and Bose-Einstein Condensates #Fidelity #High fidelity #Quantum #Quantum chaos and dynamical systems #Saturation (graph theory) #Ultracold atom #cond-mat.soft #nlin.SI #quant-ph #stochastic dynamics and bifurcation
paper · pdf · doi:10.1088/0953-4075/39/7/l01
published as J. Phys. B: At. Mol. Opt. Phys. 39, L145-L151 (2006)
openalex publication_date 2006/03/08 · arxiv created 2006/03/10 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We show that the quantum fidelity is accessible to cold atom experiments for a large class of evolutions in periodical potentials, properly taking into account the experimental initial conditions of the atomic ensemble. We prove analytically that, at the fundamental quantum resonances of the atom-optics kicked rotor, the fidelity saturates at a constant, time-independent value after a small number of kicks. The latter saturation arises from the bulk of the atomic ensemble, whilst for the resonantly accelerated atoms the fidelity is predicted to decay slowly according to a power law.