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Proposed neutron interferometry test of Berry's phase for a circulating planar spin
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory. Uppsala universitet. (Quantum information theory)
2017 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 96, 052117Article in journal (Refereed) Published
Abstract [en]

The energy eigenstates of a spin-1/2 particle in a magnetic field confined to a plane, define a planar spin. If the particle moves adiabatically around a loop in this plane, it picks up a topological Berry phase that can only be an integer multiple of π. We propose a neutron interferometry test of the Berry phase for a circulating planar spin induced by a magnetic field caused by a very long current-carrying straight wire perpendicular to the plane. This Berry phase causes destructive interference in the direction of the incoming beam of thermal neutrons moving through a triple-Laue interferometer. 

Place, publisher, year, edition, pages
2017. Vol. 96, 052117
Keyword [en]
Neutron interferometry, topological phase, Berry phase
National Category
Atom and Molecular Physics and Optics
Research subject
Physics with spec. in Atomic, Molecular and Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-330865DOI: 10.1103/PhysRevA.96.052117OAI: oai:DiVA.org:uu-330865DiVA: diva2:1147258
Funder
Swedish Research Council, D0413201
Available from: 2017-10-05 Created: 2017-10-05 Last updated: 2017-11-15

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