The Experts below are selected from a list of 171 Experts worldwide ranked by ideXlab platform
Ulrich D. Jentschura - One of the best experts on this subject based on the ideXlab platform.
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Theoretical study of the Compton Effect with correlated three-photon emission: From the differential cross section to high-energy triple-photon entanglement
Physical Review A, 2013Co-Authors: Erik Lotstedt, Ulrich D. JentschuraAbstract:The three-photon Compton Effect is studied. An incoming photon undergoes triple scattering off a free electron, which leads to the emission of three entangled photons. We investigate the properties of both the total cross section, assuming a low-energy cutoff for the detected photons, and the differential cross section. Particular emphasis is laid on evaluating polarization-resolved cross sections. The entanglement of the final three-photon state is analyzed.
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Triple Compton Effect: a photon splitting into three upon collision with a free electron.
Physical review letters, 2012Co-Authors: Erik Lotstedt, Ulrich D. JentschuraAbstract:The process in which a photon splits into three after the collision with a free electron (triple Compton Effect) is the most basic process for the generation of a high-energy multiparticle entangled state composed out of elementary quanta. The cross section of the process is evaluated in two experimentally realizable situations, one employing gamma photons and stationary electrons, and the other using keV photons and GeV electrons of an x-ray free electron laser. For the first case, our calculation is in agreement with the only available measurement of the differential cross section for the process under study. Our estimates indicate that the process should be readily measurable also in the second case. We quantify the polarization entanglement in the final state by a recently proposed multiparticle entanglement measure.
Erik Lotstedt - One of the best experts on this subject based on the ideXlab platform.
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Theoretical study of the Compton Effect with correlated three-photon emission: From the differential cross section to high-energy triple-photon entanglement
Physical Review A, 2013Co-Authors: Erik Lotstedt, Ulrich D. JentschuraAbstract:The three-photon Compton Effect is studied. An incoming photon undergoes triple scattering off a free electron, which leads to the emission of three entangled photons. We investigate the properties of both the total cross section, assuming a low-energy cutoff for the detected photons, and the differential cross section. Particular emphasis is laid on evaluating polarization-resolved cross sections. The entanglement of the final three-photon state is analyzed.
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Triple Compton Effect: a photon splitting into three upon collision with a free electron.
Physical review letters, 2012Co-Authors: Erik Lotstedt, Ulrich D. JentschuraAbstract:The process in which a photon splits into three after the collision with a free electron (triple Compton Effect) is the most basic process for the generation of a high-energy multiparticle entangled state composed out of elementary quanta. The cross section of the process is evaluated in two experimentally realizable situations, one employing gamma photons and stationary electrons, and the other using keV photons and GeV electrons of an x-ray free electron laser. For the first case, our calculation is in agreement with the only available measurement of the differential cross section for the process under study. Our estimates indicate that the process should be readily measurable also in the second case. We quantify the polarization entanglement in the final state by a recently proposed multiparticle entanglement measure.
S. Davood Sadatian - One of the best experts on this subject based on the ideXlab platform.
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Loop quantum gravity modification of the Compton Effect
General Relativity and Gravitation, 2008Co-Authors: Kourosh Nozari, S. Davood SadatianAbstract:Modified dispersion relations (MDRs) as a manifestation of Lorentz invariance violation, have been appeared in alternative approaches to quantum gravity problem. Loop quantum gravity is one of these approaches which evidently contains modification of dispersion relations. These MDRs will affect the usual formulation of the Compton Effect. The purpose of this paper is to incorporate the Effects of loop quantum gravity MDRs on the formulation of Compton scattering. Using limitations imposed on MDRs parameters from ultra high energy cosmic rays (UHECR), we estimate the quantum gravity-induced wavelength shift of scattered photons in a typical Compton process. Possible experimental detection of this wavelength shift will provide strong support for underlying quantum gravity proposal.
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Loop Quantum Gravity Modification of the Compton Effect
General Relativity and Gravitation, 2007Co-Authors: Kourosh Nozari, S. Davood SadatianAbstract:Modified dispersion relations(MDRs) as a manifestation of Lorentz invariance violation, have been appeared in alternative approaches to quantum gravity problem. Loop quantum gravity is one of these approaches which evidently requires modification of dispersion relations. These MDRs will affect the usual formulation of the Compton Effect. The purpose of this paper is to incorporate the Effects of loop quantum gravity MDRs on the formulation of Compton scattering. Using limitations imposed on MDRs parameters from Ultra High Energy Cosmic Rays(UHECR), we estimate the quantum gravity-induced wavelength shift of scattered photons in a typical Compton process. Possible experimental detection of this wavelength shift will provide strong support for underlying quantum gravity proposal.
Kourosh Nozari - One of the best experts on this subject based on the ideXlab platform.
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Loop quantum gravity modification of the Compton Effect
General Relativity and Gravitation, 2008Co-Authors: Kourosh Nozari, S. Davood SadatianAbstract:Modified dispersion relations (MDRs) as a manifestation of Lorentz invariance violation, have been appeared in alternative approaches to quantum gravity problem. Loop quantum gravity is one of these approaches which evidently contains modification of dispersion relations. These MDRs will affect the usual formulation of the Compton Effect. The purpose of this paper is to incorporate the Effects of loop quantum gravity MDRs on the formulation of Compton scattering. Using limitations imposed on MDRs parameters from ultra high energy cosmic rays (UHECR), we estimate the quantum gravity-induced wavelength shift of scattered photons in a typical Compton process. Possible experimental detection of this wavelength shift will provide strong support for underlying quantum gravity proposal.
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Loop Quantum Gravity Modification of the Compton Effect
General Relativity and Gravitation, 2007Co-Authors: Kourosh Nozari, S. Davood SadatianAbstract:Modified dispersion relations(MDRs) as a manifestation of Lorentz invariance violation, have been appeared in alternative approaches to quantum gravity problem. Loop quantum gravity is one of these approaches which evidently requires modification of dispersion relations. These MDRs will affect the usual formulation of the Compton Effect. The purpose of this paper is to incorporate the Effects of loop quantum gravity MDRs on the formulation of Compton scattering. Using limitations imposed on MDRs parameters from Ultra High Energy Cosmic Rays(UHECR), we estimate the quantum gravity-induced wavelength shift of scattered photons in a typical Compton process. Possible experimental detection of this wavelength shift will provide strong support for underlying quantum gravity proposal.
Kai Vetter - One of the best experts on this subject based on the ideXlab platform.
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Large-volume Si(Li) orthogonal-strip detectors for Compton-Effect-based instruments
IEEE Transactions on Nuclear Science, 2005Co-Authors: D. Protic, E. Hull, Thomas Krings, Kai VetterAbstract:Recent developments of large-area Si(Li) orthogonal-strip detectors have revealed their capability for applications in Compton-Effect-based instruments. Some inherent advantages of silicon such as the dominance of Compton scattering in photon interactions and operation at room or somewhat lower temperature combined with the availability of large-volume Si(Li) detectors could stimulate the development of powerful Compton instruments. Several diodes 10 mm in thickness with a diameter of 102 mm were fabricated. Two 10 mm thick diodes were cut to form a 74 mmtimes74 mm square with slightly rounded corners. The same position-sensitive structure, 32 strips with a pitch of 2 mm, was produced on the thin Li-diffused n-contact and boron-implanted p+-contact by means of photolithography and plasma etched grooves. The position-sensitive area of 64 mmtimes64 mm is surrounded by a 5 mm wide guard-ring. One of these 10 mm thick Si(Li) orthogonal-strip detectors has been mounted in a cryostat prepared at Lawrence Livermore National Laboratory (LLNL). The detector will be extensively tested there with the goal of being integrated into the Compact Si+Ge Compton camera system consisting of this Si(Li) and a HPGe orthogonal-strip detector
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Large-volume Si(Li) orthogonal-strip detectors for Compton Effect based instruments
IEEE Symposium Conference Record Nuclear Science 2004., 1Co-Authors: D. Protic, E. Hull, Thomas Krings, Kai VetterAbstract:Recent developments of large-area Si(Li) orthogonal-strip detectors have revealed their capability for applications in Compton Effect based instruments. Some inherent advantages of silicon like dominance of Compton scattering in photon interactions and operation at room or somewhat lower temperature combined with the availability of large-volume Si(Li) detectors could stimulate the development of powerful Compton instruments. Several 10 and 20 mm thick diodes with a diameter of 102 mm were fabricated. Two 10 mm thick diodes were cut to form a 74 mm /spl times/ 74 mm square with slightly rounded corners. The same position-sensitive structure, 32 strips with a pitch of 2 mm, was produced on the thin Li-diffused n-contact and boron implanted p/sup +/-contact by means of photolithography and plasma etched grooves. The position-sensitive area of 64 mm /spl times/ 64 mm is surrounded by a 5 mm wide guard-ring. One of these 10 mm thick Si(Li) orthogonal-strip detectors will be mounted in a cryostat prepared at LLNL. There, the detector will be extensively tested with the goal to be integrated into the compact Compton camera system consisting of double-sided strip Si(Li) and HPGe detectors.