The manner in which states of some quantum systems become effectively classical is of
great significance for the foundations of quantum physics, as well as for problems of …

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 analyze the interplay of chaos, entanglement, and decoherence in a system of qubits
whose collective behavior is that of a quantum kicked top. The dynamical entanglement …

In this paper we review our recent work on the theoretical approach to quantum Loschmidt
echoes, ie, various properties of the so-called echo dynamics–the composition of forward …

We study the dynamical generation of entanglement as a signature of chaos in a system of
periodically kicked coupled tops, where chaos and entanglement arise from the same …

Chaotic evolutions exhibit exponential sensitivity to initial conditions. This suggests that
even very small perturbations resulting from weak coupling of a quantum chaotic …

We study global entangling properties of the system of coupled kicked tops testing various
hypotheses and predictions concerning entanglement in quantum chaotic systems. In order …

We study time evolution of a subsystem's density matrix under unitary evolution, generated
by a sufficiently complex, say quantum chaotic, Hamiltonian, modeled by a random matrix …

We numerically study protocols consisting of repeated applications of two qubit gates used
for generating random pure states. A necessary number of steps needed in order to …

We study decoherence of two non-interacting qubits. The environment and its interaction
with the qubits are modelled by random matrices. Decoherence, measured in terms of purity …