Test of a single crystal neutron interferometer

Rauch, H.; Treimer, W.; Bonse, U.

doi:10.1016/0375-9601(74)90132-7

Cited by 451 publications

(228 citation statements)

References 15 publications

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“…It is an experiment in neutron interferometry performed by Helmut Rauch and his collaborators. The preparation of the experiment was published in [1], while the actual experiment, as presented here, was performed a year later and the results were published in [2]. Rauch has also written a 'review article' on the numerous neutron experiments that have since been performed [3].…”

Section: Magic With Neutronsmentioning

confidence: 99%

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The Stuff the World is Made of: Physics and Reality

Aerts¹

1999

Einstein Meets Magritte: An Interdisciplinary Reflection

137

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Taking into account the results that we have been obtained during the last decade in the foundations of quantum mechanic we put forward a view on reality that we call the 'creation discovery view'. In this view it is made explicit that a measurement is an act of a macroscopic physical entity on a microphysical entity that entails the creation of new elements of reality as well as the detection of existing elements of reality. Within this view most of the quantum mechanical paradoxes are due to structural shortcomings of the standard quantum theory, which means that our analysis agrees with the claim made in the Einstein Podolsky Rosen paper, namely that standards quantum mechanics is an incomplete theory. This incompleteness is however not due to the absence of hidden variables but to the impossibility for standard quantum mechanics to describe separated quantum entities. Nonlocality appears as a genuine property of nature in our view and makes it necessary to reconsider the role of space in reality. Our proposal for a new interpretation for space makes it possible to put forward an new hypothesis for why it has not been possible to unify quantum mechanics and relativity theory.Absolute space, in its own nature, without relation to anything external, remains always similar and immovable. Absolute, true, and mathematical time, of itself, and from its own nature, flows equally without relation to anything external.Isaac Newton, 1642 -1726. * Published as: Aerts, D., 1999, "The stuff the world is made of: physics and reality", in Einstein meets Magritte: an interdisciplinary reflection, eds. Aerts, D., Broekaert, J. and Mathijs, E., Kluwer Academic, Dordrecht.

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Section: Magic With Neutronsmentioning

confidence: 99%

“…We cannot go into all details in this paper and refer the reader to [1,2,3,4,5,6] for extensive analyses of Rauch's experiment. Meanwhile, more than two decades later, experimentators play in the laboratory with quantum entities brought very explicitly in non-local states .…”

Section: Magic With Neutronsmentioning

confidence: 99%

The Stuff the World is Made of: Physics and Reality

Aerts¹

1999

Einstein Meets Magritte: An Interdisciplinary Reflection

137

View full text Add to dashboard Cite

show abstract

“…Very refined and ingenious interferometers and detectors for electrons [1], neutrons [2][3][4], atoms [5][6][7], molecules [7,8] and photons [9,10] have been devised to demonstrate that the quantum interference pattern can be build up by means of the accumulation of single detection events. Even before the realization of these experiments, De Broglie [11] and Bohm [12] argued that particles with mass possess simultaneously wave and particle properties, and would move within an interferometer along trajectories determined by the guidance equation…”

Section: Introductionmentioning

confidence: 99%

“…where S(r, t) is the phase of the particle wave function Ψ(r, t) = |Ψ(r, t)|e iS(r,t)/ (2) which satisfies the time-dependent Schrdinger equation. Using the method proposed by De Broglie and Bohm, Philipidis et al [13] plotted the trajectories of massive particles in the double slit experiment [13], Dewdney showed trajectories for neutrons inside a (neutron) interferometer [14], and Sanz and MiretArts explained the Talbot effect for atoms by plotting their associated trajectories behind a diffraction grating [15].…”

Section: Introductionmentioning

confidence: 99%

Trajectory-based interpretation of Young's experiment, the Arago–Fresnel laws and the Poisson–Arago spot for photons and massive particles

Davidović¹,

Sanz²,

Božić³

et al. 2013

Phys. Scr.

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Abstract. We present a trajectory based interpretation for Young's experiment, the Arago-Fresnel laws and the Poisson-Arago spot. This approach is based on the equation of the trajectory associated with the quantum probability current density in the case of massive particles, and the Poynting vector for the electromagnetic field in the case of photons. Both the form and properties of the evaluated photon trajectories are in good agreement with the averaged trajectories of single photons observed recently in Young's experiment by Steinberg's group at the University of Toronto. In the case of the Arago-Fresnel laws for polarized light, the trajectory interpretation presented here differs from those interpretations based on the concept of "which-way" (or "which-slit") information and quantum erasure. More specifically, the observer's information about the slit that photons went through is not relevant to the existence of interference; what is relevant is the form of the electromagnetic energy density and its evolution, which will model consequently the distribution of trajectories and their topology. Finally, we also show that the distributions of end points of a large number of evaluated photon trajectories are in agreement with the distributions measured at the screen behind a circular disc, clearly giving rise to the Poisson-Arago spot.

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“…Since the first demonstration of a perfect crystal neutron interferometer (NI) in 1974 [1], numerous experiments have been performed exploring both the nature of the neutron and its interactions [2,3]. Examples include the first observation of a quantum phase shift due to the Earth's gravitational field [4], demonstrating the 4π symmetry of spinor rotation [5], and measuring the effect of the Earth's rotation on the phase of the neutron (Sagnac effect) [6] among other fundamental experiments.…”

Section: Introductionmentioning

confidence: 99%

Decoupling of a neutron interferometer from temperature gradients

Saggu

Mineeva

Arif

et al. 2016

Review of Scientific Instruments

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Neutron interferometry enables precision measurements that are typically operated within elaborate, multi-layered facilities which provide substantial shielding from environmental noise. These facilities are necessary to maintain the coherence requirements in a perfect crystal neutron interferometer which is extremely sensitive to local environmental conditions such as temperature gradients across the interferometer, external vibrations, and acoustic waves. The ease of operation and breadth of applications of perfect crystal neutron interferometry would greatly benefit from a mode of operation which relaxes these stringent isolation requirements. Here, the INDEX Collaboration and National Institute of Standards and Technology demonstrates the functionality of a neutron interferometer in vacuum and characterize the use of a compact vacuum chamber enclosure as a means to isolate the interferometer from spatial temperature gradients and time-dependent temperature fluctuations. The vacuum chamber is found to have no depreciable effect on the performance of the interferometer (contrast) while improving system stability, thereby showing that it is feasible to replace large temperature isolation and control systems with a compact vacuum enclosure for perfect crystal neutron interferometry.

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Test of a single crystal neutron interferometer

Cited by 451 publications

References 15 publications

The Stuff the World is Made of: Physics and Reality

The Stuff the World is Made of: Physics and Reality

Trajectory-based interpretation of Young's experiment, the Arago–Fresnel laws and the Poisson–Arago spot for photons and massive particles

Decoupling of a neutron interferometer from temperature gradients

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