Coherence properties of channeled spectra

Heiniger, F.; Herden, A.; Tschudi, T.

doi:10.1016/0030-4018(83)90206-7

Cited by 13 publications

(2 citation statements)

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“…On comparing the Planck spectrum shown in figure 7 with the spectra shown in figure 8 we see that the spectrum changes drastically when the two beams are superposed and that, with increasing distance x from the axis, it exhibits more and more rapid oscillations. These spectra have some similarities with the well known channelled spectra, also called Edser-Butler fringes, which are sometimes used in interferometry for purposes of calibration (Ditchburn 1963, Born and Wolf 1980, Heiniger et al 1983. The similarity is only superficial.…”

Section: Spectral Changes In the Young Interference Experimentsmentioning

confidence: 76%

Correlation-induced spectral changes

1996

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This paper presents a review of research, both theoretical and experimental, concerning the influence of coherence properties of fluctuating light sources and of correlation properties of scattering media on the spectra of radiated and scattered fields. Much of this research followed a discovery made in 1986, that the spectrum of light may change on propagation, even in free space. More than 100 papers on this topic have been published to date and many of them are reviewed, or at least mentioned, in this article.After an introduction and a summary of some of the main mathematical results relating to second-order coherence theory of statistically stationary optical fields, spectral changes that may take place on superposing fields produced by two partially correlated sources are discussed. Spectral effects in fields produced by two-dimensional secondary sources and by three-dimensional primary sources are then considered.The section which follows describes spectral changes that may arise when polychromatic light is scattered on media whose physical properties vary randomly either in space and/or in time. A review is also presented of recent research, which has revealed that under certain circumstances the changes in the spectrum of light scattered on random media may imitate the Doppler effect, even though the source, the medium and the observer are all at rest with respect to one another.In the final section a brief review is given of a new emerging technique sometimes called spatial-coherence spectroscopy. It is based on the discovery that it is possible, under certain circumstances, to determine field correlations from spectral measurements.

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Section: Spectral Changes In the Young Interference Experimentsmentioning

confidence: 76%

Correlation-induced spectral changes

1996

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“…Interference actually occurs no matter how large the optical path difference between two subbeams or two wave packets may be. From classical optics it has been known for many years that the coherence properties manifest themselves in a spatial intensity variation for spatial shifts smaller than the coherence length and in a spectral intensity variation for large phase shifts (Mandel 1962(Mandel , 1965Heineger et al 1983;James and Wolf 1991;Zou et al 1992;Agarwal and James 1993). A detailed experimental study of the spectral modification in an optical Mach-Zehnder interferometer has been reported by Rao and Kumar (1994).…”

Section: Figure 427 Schematic Diagrams For Various Post-selection Exp...mentioning

confidence: 99%

Neutron Interferometry 2nd Edn

Rauch¹,

Werner²

2015

131

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In this new edition we have retained the overall structure of the original book. It now consists of 12 chapters. We have shifted some material from later chapters to the first chapter. In particular, we have described gravitationally induced quantum interference (COW experiment) and early experiments on spin rotation, spinors, and spin-related phases in Chapter 1. These results have gotten broad attention in recent years and are now described in various standard physics textbooks. This change in format was done with a view of the close connection of these experiments with the atom interferometry field and with the modern ideas on entanglement now permeating all of the modern quantum mechanical literature.Neutron interferometry is a mature technique in experimental physics. The use of the perfect silicon crystal interferometer to accurately measure scattering lengths of many isotopes is given in Chapter 3. Very accurate measurements of the neutron scattering lengths of the proton, deuteron, and He-3 have been carried out in recent years. These results confine the parameters in various theoretical models of few-body nuclear physics.Chapter 4 is retitled "Coherence and Decoherence," so as to include many new topics connected to the current emphasis in certain areas of physics related to how coherent quantum systems decohere and evolve into systems described by classical Lagrangian and Hamiltonian mechanics. The quantum concepts of entanglement, contexuality, squeezing, Wigner functions, interactions of quantum systems with the environment, post selection experiments, measures of distinguishability, intensity-intensity correlations, and Bell's inequalities are the general topics of this expanded chapter. "Contexuality and Kochen-Specker Phenomena" are discussed in a new Chapter 7.Our original Chapter 8 dealing with forthcoming and more speculative experiments is now Chapter 10. Some of those experiments have advanced considerably over the intervening 12 years since the publication of the 1st edition. Experiments related to searches for non-Newtonian gravity at short distances have been pursued in various confined geometries, such as transmission through narrow slits. Related ideas, called "bouncing ball" experiments, have successfully observed quantized states of ultra-cold neutrons in the Earth's gravity. An experiment designed to observe the Anandan acceleration has not yet been attempted. The observation of relativistic proper time effects, as suggested in Chapter 8, occurs at the level of 10 -9 . Suggested observation of such effects in atom beam interferometry, related to a gravitational redshift, has generated interesting, but controversial papers. Perhaps there is a way to pursue such effects with neutron interferometry utilizing the Pendellösung interference fringes, as discussed in this chapter on "Gravitational, Inertial, and Motional Effects." A feasible time-dependent Fizeau experiment is described to study new motional effects and for the cooling of neutron beams.Various new techniques and experiments of...

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Achievements in Neutron Interferometry

Rauch¹

1995

Advances in Quantum Phenomena

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Coherence properties of channeled spectra

Cited by 13 publications

References 13 publications

Correlation-induced spectral changes

Correlation-induced spectral changes

Neutron Interferometry 2nd Edn

Achievements in Neutron Interferometry

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