Abstract We investigate the validity of quantum regression for a family Hamiltonians on multipartite system leading to phase-damping reduced dynamics. After finding necessary and sufficient conditions CP-divisibility corresponding channel, we evaluate hierarchy equations equivalent under arbitrary interventions; in particular, find nontrivial dephasing be compatible with regression. In this fra...

The binding and trapping of particles usually rely on conservative forces, described by unitary quantum dynamics. We show that both can also arise solely from spatially dependent dephasing, the simplest type decoherence. This be based continuous weak position measurements in only selected regions space, for which we propose a practical realisation. For single particle, demonstrate particle-in-t...

The interaction between coherent polaritons and incoherent excitons plays an important role in polariton physics. Using resonant pump-probe spectroscopy with selective excitation of single polariton branches, we investigate the different dephasing mechanisms responsible for generating a long-lived exciton reservoir. As expected, pumping the upper polariton results in a strong dephasing process ...

We report on the electronic dephasing times of the nonpolar chromophore diphenylacetylene (DPA) in ethanol and in cyclohexane (polar and nonpolar solvents respectively) by photon echo measurements in the ultraviolet. Contrary to previous reports, we observed sub-100-fs electronic dephasing times for DPA in both solvents. We identify fast dynamics of tau=40+/-10 fs on the photon echo peak shift ...