2010/02/01 by S. Sponar, S Sponar, J Klepp +17
Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #Atomic and Subatomic Physics Research #Geometric phase #Geometric shape #Interferometry #Neutron #Nuclear Physics and Applications #Phase (matter) #Polarimeter #Spin (aerodynamics) #quant-ph
paper · pdf · doi:10.1088/1751-8113/43/35/354015
published as J. Phys. A: Math. Theor. 43, 354015 (2010) · 17 pages, 9 figures
arxiv created 2010/02/01 · openalex publication_date 2010/08/12 · arxiv updated 2015/05/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Geometric phase phenomena in single neutrons have been observed in polarimeter and interferometer experiments. Interacting with static and time dependent magnetic fields, the state vectors acquire a geometric phase tied to the evolution within spin subspace. In a polarimeter experiment the non-additivity of quantum phases for mixed spin input states is observed. In a Si perfect-crystal interferometer experiment appearance of geometric phases, induced by interaction with an oscillating magnetic field, is verified. The total system is characterized by an entangled state, consisting of neutron and radiation fields, governed by a Jaynes-Cummings Hamiltonian. In addition, the influence of the geometric phase on a Bell measurement, expressed by the Clauser-Horne-Shimony-Holt (CHSH) inequality, is studied. It is demonstrated that the effect of geometric phase can be balanced by an appropriate change of Bell angles.