Entanglement-assisted coherent control in nonreactive diatom–diatom scattering

Abstract

Intriguing quantum effects that result from entangled molecular rovibrational states are shown to provide a novel means for controlling both differential and total collision cross sections in identical particle diatom-diatom scattering. Computational results on elastic and inelastic scattering of para-H2 and para-H2 are presented, with the collision energy ranging from 400 cm −1 to the ultracold regime. The experimental realization and possible extension to other systems are discussed.

Quantum-mechanical theory of atom-molecule and molecular collisions in a magnetic field: Spin depolarization

“…This approach has been used in a recent study of H 2 -H 2 scattering. 34 In a rigorous solution with an infinite close coupling expansion, this would give an exact result. In practice, however, we need to approximate and a better procedure is to symmetrize the total wave function of the collision complex from the beginning.…”

Coherent control in strongly driven multi-level systems: quantum vs classical features

“…In the stationary state scenario, control requires such fundamentally quantum feature as entanglement in the initial state of the controlled system (see e.g. [8][9][10]. As shown in [5,6], the role of entanglement is to ensure that all collisions within the scattering volume occur at a single favourable configuration of internal states.…”

A Bi-Axial Quantum State That Controls Molecular Collisions Like a Double-Slit Interferometer

“…Because the polarization directions of the pump and Stokes laser pulses determine the m state superposition, they can be used to control the interference effects in the scattering process. Such control is not limited to inelastic scattering, the m state superposition can control elastic and reactive scattering processes as well [9,37,38].…”