Incoherent dynamics in neutron-matter interaction

Details Incoherent dynamics in neutron-matter interaction Incoherent dynamics in neutron-matter interaction

1997-09-11

arxiv.org/abs/quant-ph/9709024v1

Phys.Rev.A56:4826-4838,1997

Physics

Quantum Physics

15 pages, revtex, no figures, to appear in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.56.4826

Coherent and incoherent neutron-matter interaction is studied inside a recently introduced approach to subdynamics of a macrosystem. The equation describing the interaction is of the Lindblad type and using the Fermi pseudopotential we show that the commutator term is an optical potential leading to well-known relations in neutron optics. The other terms, usually ignored in optical descriptions and linked to the dynamic structure function of the medium, give an incoherent contribution to the dynamics, which keeps diffuse scattering and attenuation of the coherent beam into account, thus warranting fulfilment of the optical theorem. The relevance of this analysis to experiments in neutron interferometry is briefly discussed.

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