Quantum technologies represent a rapidly evolving field in which the specific properties of
quantum mechanical systems are exploited to enhance the performance of various …

Fidelity serves as a benchmark for the reliability in quantum information processes, and has
recently attracted much interest as a measure of the susceptibility of dynamics to …

We study the decoherence of a one-particle system, whose classical correspondent is
chaotic, when it evolves coupled to a weak quenched environment. This is done by …

arXiv:1206.6348v1 [nlin.CD] 27 Jun 2012 Page 1 arXiv:1206.6348v1 [nlin.CD] 27 Jun 2012
Loschmidt Echo Arseni Goussev1, Rodolfo A. Jalabert2, Horacio M. Pastawski3, and Diego …

A general relation is derived, which expresses the fidelity of quantum dynamics, measuring
the stability of time evolution to small static variation in the Hamiltonian, in terms of ergodicity …

In this review we summarize and amplify recent investigations of coupled quantum
dynamical systems with few degrees of freedom in the short-wavelength, semiclassical limit …

We derive a simple and general relation between the fidelity of quantum motion,
characterizing the stability of quantum dynamics with respect to arbitrary static perturbation …

The sensitivity of a wave field's evolution to small perturbations is of fundamental interest.
For chaotic systems, there are two distinct regimes of either exponential or Gaussian overlap …

When a qubit or spin interacts with others under a many-body Hamiltonian, the information it
contains progressively scrambles. Here, nuclear spins of an adamantane crystal are used as …

A bstract We study the contour dependence of the out-of-time-ordered correlation function
(OTOC) both in weakly coupled field theory and in the Sachdev-Ye-Kitaev (SYK) model. We …