Results 31 to 40 of about 816,157 (339)

Searches for Ultra-High-Energy Photons at the Pierre Auger Observatory

open access: yesUniverse, 2022
The Pierre Auger Observatory, which is the largest air-shower experiment in the world, offers unprecedented exposure to neutral particles at the highest energies.
The Pierre Auger Collaboration
doaj   +1 more source

Theory for the Beam Splitter in Quantum Optics: Quantum Entanglement of Photons and Their Statistics, HOM Effect

open access: yesMathematics, 2022
The theory of the beam splitter (BS) in quantum optics is well developed and based on fairly simple mathematical and physical foundations. This theory has been developed for any type of BS and is based on the constancy of the reflection coefficients R ...
Dmitry Makarov
doaj   +1 more source

Evaluation of the Electron Contamination in Photon Therapy Using BEAMnrc Code

open access: yesمجله دانشکده پزشکی اصفهان, 2019
Background: Today, high-energy photon beams are widely used in the treatment of all types of cancers. However, the production of electrons as contaminants in the photon pathway provides the necessity for research in this field.
Nahid Chegeni   +3 more
doaj   +1 more source

Quantum Theory of Scattering of Nonclassical Fields by Free Electrons

open access: yesMathematics, 2023
At present, there is no non-perturbative theory of scattering of nonclassical electromagnetic waves by free electrons that describes the scattering process completely with the help of quantum physics.
Dmitry Makarov
doaj   +1 more source

Experimental position-time entanglement with degenerate single photons

open access: yes, 2008
We report an experiment in which two-photon interference occurs between degenerate single photons that never meet. The two photons travel in opposite directions through our fibre-optic interferometer and interference occurs when the photons reach two ...
A. J. Bennett   +6 more
core   +1 more source

Hertz potentials approach to the dynamical Casimir effect in cylindrical cavities of arbitrary section [PDF]

open access: yes, 2004
We study the creation of photons in resonant cylindrical cavities with time dependent length. The physical degrees of freedom of the electromagnetic field are described using Hertz potentials. We describe the general formalism for cavities with arbitrary
Birrell N D   +22 more
core   +2 more sources

Theoretical Investigation of the Influence of Different Heavy Metal Oxides Modifiers on ZnO-Bi2O3-B2O3-SiO2’s Photon- and Neutron-Shielding Capabilities Using the Monte Carlo Method

open access: yesApplied Sciences, 2023
Radiation has become an essential part in medicine and researchers are constituently investigating radiation shielding materials that are suitable for different medical applications.
Hanan Akhdar
doaj   +1 more source

Spatial entanglement of paired photons generated in cold atomic ensembles

open access: yes, 2008
Cold atomic ensembles can mediate the generation of entanglement between pairs of photons. Photons with specific directions of propagation are detected, and the entanglement can reside in any of the degrees of freedom that describe the whole quantum ...
Clara I. Osorio   +4 more
core   +1 more source

Semiconductor quantum dot - a quantum light source of multicolor photons with tunable statistics [PDF]

open access: yes, 2001
We investigate the intensity correlation properties of single photons emitted from an optically excited single semiconductor quantum dot. The second order temporal coherence function of the photons emitted at various wavelengths is measured as a function
Ehrenfreund, E.   +5 more
core   +1 more source

Photon-photon colliders

open access: yesProceedings Particle Accelerator Conference, 2002
Since the seminal work by Ginsburg, et al. (1984), the subject of giving the Next Linear Collider photon-photon capability, as well as electron-positron capability, has drawn much attention. A 1990 article by V.I. Telnov describes the situation at that time. In March 1994, the first workshop on this subject was held.
openaire   +4 more sources

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