Results 41 to 50 of about 15,767 (205)

Two loop stress-energy tensor for inflationary scalar electrodynamics

open access: yes, 2008
We calculate the expectation value of the coincident product of two field strength tensors at two loop order in scalar electrodynamics on de Sitter background. The result agrees with the stochastic formulation which we have developed in a companion paper
A. A. Starobinsky   +8 more
core   +1 more source

Might quantum-induced deviations from the Einstein equations detectably affect gravitational wave propagation?

open access: yes, 2013
A quantum measurement-like event can produce any of a number of macroscopically distinct results, with corresponding macroscopically distinct gravitational fields, from the same initial state. Hence the probabilistically evolving large-scale structure of
Kent, Adrian
core   +1 more source

Integrated Metallo‐Dielectric 3D Hotspots From High Refractive Index Nanodiamond‐Plasmonic Gold Cryosoret Nano‐Assemblies for Photonic Crystal Enhanced Fluorescence

open access: yesAdvanced Functional Materials, EarlyView.
This work presents a novel sensing platform using metallo‐dielectric cryosoret nano‐assemblies and lossless photonic crystals to overcome limitations of conventional plasmonic biosensors. The hybrid system enhances both electric and magnetic field interactions, enabling amplified fluorescence, ultralow detection limits, and prism‐free, objective‐free ...
Seemesh Bhaskar   +5 more
wiley   +1 more source

How to Test Triboelectric Nanogenerators: Key Factors for Standardized Performance Evaluation

open access: yesAdvanced Energy Materials, EarlyView.
This paper is a guide on how to test triboelectric nanogenerators (TENGs) so that results can be reliably compared across different laboratories. It explores the many factors (fabrication, mechanical, electrical, and environmental) that can affect TENG testing results and provides recommendations for best practice in testing and performance evaluation.
Daniel M. Mulvihill   +10 more
wiley   +1 more source

Classical Phase Space Density for the Relativistic Hydrogen Atom

open access: yes, 2005
Quantum mechanics is considered to arise from an underlying classical structure (``hidden variable theory'', ``sub-quantum mechanics''), where quantum fluctuations follow from a physical noise mechanism.
Nieuwenhuizen, Th. M.
core   +2 more sources

Artificial Intelligence‐Assisted Target Design for High‐Intensity Laser‐Driven Neutron Sources

open access: yesAdvanced Intelligent Systems, EarlyView.
This study presents an artificial intelligence (AI)‐assisted target design that combines particle‐in‐cell simulations with gradient ascent algorithm to optimize laser‐driven neutron sources. By enhancing the sheath electric field, the optimized structure increases neutron yield by a factor of 4,000.
Youjing Wang   +7 more
wiley   +1 more source

Inflation of universe due to nonlinear electrodynamics

open access: yes, 2017
A model of nonlinear electrodynamics with a dimensional parameter $\beta$ is considered. Electromagnetic fields are the source of the gravitation field and inflation of the universe. We imply that the universe is filled by stochastic magnetic fields.
Kruglov, S. I.
core   +1 more source

Quantum Jumps in Amplitude Bistability: Tracking a Coherent and Invertible State Localization

open access: yesAnnalen der Physik, EarlyView.
A notable asymmetry is shown to characterize the bistable switching between macroscopic metastable states of light in the strong‐coupling limit of radiation–matter interaction. Transitions from the vacuum to a highly excited state correlate with a highly bunched sequence of emitted photons, while a downward switch to the vacuum involves a coherent ...
Th. K. Mavrogordatos
wiley   +1 more source

Quantum electrodynamical formulation of photochemical acid generation and its implications on optical lithography

open access: yesETRI Journal
The photochemical acid generation is refined from the first principles of quan-tum electrodynamics. First, we briefly review the formulation of the quantum theory of light based on the quantum electrodynamics framework to establish the probability of ...
Seungjin Lee
doaj   +1 more source

Cavity Quantum Electrodynamics of Continuously Monitored Bose-Condensed Atoms

open access: yesAtoms, 2015
We study cavity quantum electrodynamics of Bose-condensed atoms that are subjected to continuous monitoring of the light leaking out of the cavity. Due to a given detection record of each stochastic realization, individual runs spontaneously break the ...
Mark D. Lee, Janne Ruostekoski
doaj   +1 more source

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