Results 11 to 20 of about 374,279 (311)

Multiphoton amplitude in a constant background field [PDF]

open access: yesEPJ Web of Conferences, 2018
In this contribution, we present our recent compact master formulas for the multiphoton amplitudes of a scalar propagator in a constant background field using the worldline fomulation of quantum field theory.
Ahmad Aftab   +4 more
doaj   +2 more sources

Sum Squeezing of the Field Amplitude in Frequency Upconversion Process

open access: yesInternational Journal of Optics, 2020
Sum squeezing of the field amplitude is studied in the nondegenerate and degenerate frequency upconversion process under the short interaction time. It is shown that sum squeezing can be converted into normal squeezing via sum-frequency generation in the
Dilip Kumar Giri, Binod Kumar Choudhary
doaj   +2 more sources

Corneal deflection amplitude and visual field progression in primary open-angle glaucoma.

open access: yesPLoS ONE, 2019
PurposeTo investigate the relationship between corneal deflection amplitude and visual field progression rate in patients with primary open-angle glaucoma (POAG).MethodsThis study included 113 eyes of 65 patients with POAG followed for an average of 4.81
Younhea Jung   +2 more
doaj   +2 more sources

The Baker-Coon-Romans N-point amplitude and an exact field theory limit of the Coon amplitude

open access: yesJournal of High Energy Physics
We study the N-point Coon amplitude discovered first by Baker and Coon in the 1970s and then again independently by Romans in the 1980s. This Baker-Coon-Romans (BCR) amplitude retains several properties of tree-level string amplitudes, namely duality and
Nicholas Geiser
doaj   +2 more sources

Numerical Analysis of Aeroacoustic Characteristics around a Cylinder under Constant Amplitude Oscillation

open access: yesEnergies, 2022
The present study numerically investigated a cylinder under oscillating motions at a low Reynolds number. The effects of two oscillation frequencies and amplitudes on the lift drag coefficient, near-field surface pressure fluctuation, and far-field noise
Peixun Yu   +3 more
doaj   +1 more source

Superstring Loop Amplitudes from the Field Theory Limit [PDF]

open access: yesPhysical Review Letters, 2021
8 pages, 2 figures.
Yvonne Geyer   +2 more
openaire   +4 more sources

On-Shell Covariance of Quantum Field Theory Amplitudes

open access: yesPhysical Review Letters, 2023
6 ...
Cohen, Timothy   +3 more
openaire   +3 more sources

Large amplitude forced vibrations of Timoshenko beams using coupled displacement field method

open access: yesForces in Mechanics, 2022
Forced vibration behaviour of a Timoshenko beam, with a concentrated mass at the centre, subjected to a concentrated harmonic force is investigated using the coupled displacement field method.
K. Meera Saheb   +2 more
doaj   +1 more source

Study on the Characterization Method of Ultrasonic Cavitation Field based on the Numerical Simulation of the Amplitude of Sound Pressure [PDF]

open access: yesMATEC Web of Conferences, 2020
In order to meet the visualization requirements of the cavitation field distribution in the ultrasonic cavitation reactor, a method based on the numerical simulation of the amplitude of sound pressure is proposed. In order to verify that the amplitude of
Tao Tangfei, Zhao Jinmin, Wang Wei
doaj   +1 more source

Scalar-field amplitudes in black-hole evaporation [PDF]

open access: yesPhysics Letters B, 2004
We study the quantum-mechanical decay of a Schwarzschild-like black hole into almost-flat space and weak radiation at a very late time, evaluating quantum amplitudes (not just probabilities) for transitions from initial to final states. No information is lost. The model contains gravity and a massless scalar field.
Farley, A. N. St. J., D'Eath, Peter D.
openaire   +3 more sources

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