5,353 research outputs found
Finite Kerr medium: Macroscopic quantum superposition states and Wigner functions on the sphere
No full textWe propose a spin model which exhibits the main properties of the Kerr medium. The description of the model uses a recently generalized quasiprobability distribution (Wigner function) for the SU(2) group. This function is naturally defined on the sphere, which plays the role of phase space for the spin system. Our model leads to macroscopic quantum superposition states on the sphere. �1999 The American Physical Society
Finite Kerr medium: Macroscopic quantum superposition states and Wigner functions on the sphere
No full textWe propose a spin model which exhibits the main properties of the Kerr medium. The description of the model uses a recently generalized quasiprobability distribution (Wigner function) for the SU(2) group. This function is naturally defined on the sphere, which plays the role of phase space for the spin system. Our model leads to macroscopic quantum superposition states on the sphere. ©1999 The American Physical Society
The Sacramental Theory in John 19:26-27
No full textAbout the author: Father Theodore Koehler, S.M., of the Seminaire Marianiste at the University of Fribourg, Switzerland, studied under Father Neubert
Christian Insight
No full textVery Rev . John A. Elbert, S.M., is Graduate Dean of Arts and Sciences, Professor of Philosophy, creator of the Interdisciplinary Seminar, former President of the University of Dayton. He is the author of a number of books
Mary and American Protestants
No full textAbout the author: Father William Cole, S.M., is Professor and director of graduate work in Theological Studies at the University of Dayton. He has long been associated with the Marian Library
Overcoming the Obstacles to Counselling Research
No full textThe author of this article, Brother Marion F. Belka, S.M., is Vice President of St. Mary\u27s University in San Antonio, Texas, and President of the National Catholic Guidance Conference
In Vivo Acticity of Bupropion at the Human Dopamine Transporter as Measured by Positron Emission Tomography
No full textArticle title: In vivo acticity of bupropion at the human dopamine transporter as measured by positron emission tomography. Reference: BPS7603 Journal title: Corresponding author: Dr. S.M. Learned-Coughlin First author: Dr. S.M. Learned-Coughlin Citation</p
Extremal vanishing horizon Kerr-AdS black holes at ultraspinning limit
No full textAbstract By utilizing the ultraspinning limit we generate a new class of extremal vanishing horizon (EVH) black holes in odd dimensions (d ≥ 5). Starting from the general multi-spinning Kerr-AdS metrics, we show the EVH limit commutes with the ultraspinning limit,in which the resulting solutions possess a non-compact but finite area manifold for all (t, r ≠ r +) = const. slices. We also demonstrate the near horizon geometries of obtained ultraspinning EVH solutions contain an AdS3 throats, where it would be a BTZ black hole in the near EVH cases. The commutativity of the ultraspinning and near horizon limits for EVH solutions is confirmed as well. Furthermore, we discuss only five-dimensional case near the EVH point can be viewed as a super-entropic black hole. We also show that the thermodynamics of the obtained solutions agree with the BTZ black hole. Moreover we investigate the EVH/CFT proposal, demonstrating the entropy of 2d dual CFT and Bekenstein-Hawking entropy are equivalent
Cross-phase modulation in rubidium-87
No full textThis thesis explores the theoretical foundations of cross-phase modulation (XPM) between optical fields in the N-configuration atom. This is the process by which the refractive index experienced by one field can be modulated by controlling the intensity of another. The electro-optical version of this effect was first discovered by John Kerr in 1875 and found applications in photonics as a means of very rapidly modulating the phase and intensity of electromagnetic fields. Due to recent advances in experimental techniques there has been growing interest in generating nonlinear optical interactions in coherently prepared atomic ensembles.
The use of coherently prepared media brings the possibility of achieving a much larger cross-phase modulation than is possible using classical materials. This is particularly useful when trying to create large optical nonlinearities between low-intensity electromagnetic fields. Much of the current research into cross-phase modulation is directed towards realising potential applications in the emerging field of quantum information processing. Above all, the possibility of constructing an all-optical quantum computer has been at the heart of much research and controversy in the field.
In this thesis the theory of steady-state, transient and pulsed cross-phase modulation is developed. Moreover, care has been taken to relate all research back to experimentally feasible situations. As such, the relevance of the theory is justified by consideration of the situation present in rubidium-87. Due to the close relationship between XPM in the N-configuration atom and electromagnetically induced transparency in the Lambda-atom, many similarities and insights act as link between these two fields. Indeed, it is frequently demonstrated that the key to understanding the various properties of XPM in the N-configuration atom is by comparison with the situation in the corresponding Lambda-atom equivalent
Direct numerical simulation of the flow around a wing section at moderate Reynolds numbers
No full textA three dimensional direct numerical simulation has been performed to study the flow around the asymmetric NACA-4412 wing at a moderate chord Reynolds number (Rec = 400, 000) with an angle of attack of 5◦ . The flow case under investigation poses numerous challenges for a numerical method due to the wide range of scales and complicated flow physics induced by the geometry. The mesh is optimized and well resolved to account for such varying scales in the flow. An unsteady volume force is used to trip the flow to turbulence on both sides of the wing at 10% chord. Full turbulent statistics are computed on the fly to further investigate the complicated flow features around the wing. The present simulation shows the potential of high-order methods in simulating complex external flows at moderately high Reynolds numbers
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