96 citations · 249 across the 9 of their papers we have counts for
4 papers · 1 filter
Sensitivity to small perturbations in systems of large quantum spins
Tarek A. Elsayed, Boris V. Fine
We investigate the sensitivity of nonintegrable large-spin quantum lattices to small perturbations with a particular focus on the time reversal experiments known in statistical phy…
Absence of exponential sensitivity to small perturbations in nonintegrable systems of spins 1/2
Boris V. Fine, Tarek A. Elsayed, Chahan M. Kropf +1
We show that macroscopic nonintegrable lattices of spins 1/2, which are often considered to be chaotic, do not exhibit the basic property of classical chaotic systems, namely, expo…
Regression relation for pure quantum states and its implications for efficient computing
Tarek A. Elsayed, Boris V. Fine
We obtain a modified version of the Onsager regression relation for the expectation values of quantum-mechanical operators in pure quantum states of isolated many-body quantum syst…
Signatures of Chaos in Time Series Generated by Many-Spin Systems at High Temperatures
Tarek A. Elsayed, Benjamin Hess, Boris V. Fine
Extracting reliable indicators of chaos from a single experimental time series is a challenging task, in particular, for systems with many degrees of freedom. The techniques availa…