Permanent magnetic field-prism polarizer for perfect crystal neutron interferometers

Badurek, G.; Buchelt, R.J; Kroupa, Gerhard; Baron, M.; Villa, Mario

doi:10.1016/s0921-4526(00)00347-1

Cited by 12 publications

(8 citation statements)

References 4 publications

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“…1. A monochromatic beam, with mean wavelength λ 0 = 1.91 Å(∆λ/λ 0 ∼ 0.02) and 5x5 mm 2 beam cross-section, is polarized by a bi-refringent magnetic field prism in ẑ-direction [53]. Due to the angular separation at the deflection, the interferometer is adjusted so that only the spin-up component fulfills the Bragg condition at the first interferometer plate (beam splitter).…”

Section: Methodsmentioning

confidence: 99%

Geometric phase in entangled systems: A single-neutron interferometer experiment

et al. 2010

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The influence of the geometric phase on a Bell measurement, as proposed by Bertlmann et al. in [Phys. Rev. A 69, 032112 (2004)], and expressed by the Clauser-Horne-Shimony-Holt (CHSH) inequality, has been observed for a spin-path entangled neutron state in an interferometric setup. It is experimentally demonstrated that the effect of geometric phase can be balanced by a change in Bell angles. The geometric phase is acquired during a time dependent interaction with two radio-frequency (rf) fields. Two schemes, polar and azimuthal adjustment of the Bell angles, are realized and analyzed in detail. The former scheme, yields a sinusoidal oscillation of the correlation function S, dependent on the geometric phase, such that it varies in the range between 2 and 2 √ 2 and, therefore, always exceeds the boundary value 2 between quantum mechanic and noncontextual theories. The latter scheme results in a constant, maximal violation of the Bell-like-CHSH inequality, where S remains 2 √ 2 for all settings of the geometric phase.

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Section: Methodsmentioning

confidence: 99%

Geometric phase in entangled systems: A single-neutron interferometer experiment

et al. 2010

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“…A magnetically saturated Heusler crystal together with a Larmor accelerator and a rectangular spin-1/2 turner enabled spin analysis, i.e. the selection of neutrons with certain polarization directions, for one of the two interfering beams [32]. This O-beam was used to observe the phase shift due to the off-diagonal geometric phase.…”

Section: A Setupmentioning

confidence: 99%

Observation of off-diagonal geometric phases in polarized-neutron-interferometer experiments

Hasegawa¹,

Loidl²,

Badurek³

et al. 2002

Phys. Rev. A

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Off-diagonal geometric phases acquired in the evolution of a spin-1/2 system have been investigated by means of a polarized neutron interferometer. Final counts with and without polarization analysis enable us to observe simultaneously the off-diagonal and diagonal geometric phases in two detectors. We have quantitatively measured the off-diagonal geometric phase for noncyclic evolutions, confirming the theoretical predictions. We discuss the significance of our experiment in terms of geometric phases (both diagonal and off-diagonal) and in terms of the quantum erasing phenomenon.

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“…There E is the energy, k the wave number, m the mass, and µ the magnetic moment of the neutrons. Although for thermal neutrons the angular separation of these trajectories [5]…”

Section: Methodsmentioning

confidence: 99%

Amorphous soft-magnetic ribbons studied by ultra-small-angle polarized neutron scattering

Badurek¹,

Jericha²,

Größinger³

et al. 2010

J. Phys.: Conf. Ser.

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When we investigated the magnetic structure of a variety of soft-magnetic amorphous ribbons by means of ultra-small-angle neutron scattering (USANSPOL) we were confronted with one particularly interesting Fe 65.7 Co 18 Si 0.8 B 15.5 ribbon, provided by VAC Hanau. Due to a special thermal treatment during production a field-and stress-induced transverse domain texture was expected. Although the USANSPOL technique encountered its resolution limits during the investigation of this specific sample ribbon, such a texture could indeed be verified.

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Permanent magnetic field-prism polarizer for perfect crystal neutron interferometers

Cited by 12 publications

References 4 publications

Geometric phase in entangled systems: A single-neutron interferometer experiment

Geometric phase in entangled systems: A single-neutron interferometer experiment

Observation of off-diagonal geometric phases in polarized-neutron-interferometer experiments

Amorphous soft-magnetic ribbons studied by ultra-small-angle polarized neutron scattering

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