Results 1 to 10 of about 648,849 (327)

Precision early universe cosmology from stochastic gravitational waves [PDF]

Journal of High Energy Physics, 2022
The causal tail of stochastic gravitational waves can be used to probe the energy density in free streaming relativistic species as well as measure g * (T) and beta functions β(T) as a function of temperature.
Dawid Brzeminski, Anson Hook, Gustavo Marques-Tavares   +2 more
doaj   +2 more sources

Curvature Invariants for the Alcubierre and Natário Warp Drives

Universe, 2021
A process for using curvature invariants is applied to evaluate the metrics for the Alcubierre and the Natário warp drives at a constant velocity. Curvature invariants are independent of coordinate bases, so plotting these invariants will be free of ...
Brandon Mattingly, Abinash Kar, Matthew Gorban, William Julius, Cooper K. Watson, MD Ali, Andrew Baas, Caleb Elmore, Jeffrey S. Lee, Bahram Shakerin, Eric W. Davis, Gerald B. Cleaver   +11 more
doaj   +1 more source

Chiral gravitational effect in time-dependent backgrounds

Journal of High Energy Physics, 2021
Gravitational counterpart of the chiral magnetic effect, which is referred as the chiral gravitational effect, can also be of interest in a cosmological setup.
Kohei Kamada, Jun’ya Kume, Yusuke Yamada   +2 more
doaj   +1 more source

The Asymmetric Dynamical Casimir Effect

Physics, 2023
A mirror with time-dependent boundary conditions will interact with the quantum vacuum to produce real particles via a phenomenon called the dynamical Casimir effect (DCE).
Matthew J. Gorban, William D. Julius, Patrick M. Brown, Jacob A. Matulevich, Gerald B. Cleaver   +4 more
doaj   +1 more source

Curvature Invariants for Lorentzian Traversable Wormholes

Universe, 2020
The curvature invariants of three Lorentzian wormholes are calculated and plotted in this paper. The plots may be inspected for discontinuities to analyze the traversability of a wormhole.
Brandon Mattingly, Abinash Kar, William Julius, Matthew Gorban, Cooper Watson, MD Ali, Andrew Baas, Caleb Elmore, Bahram Shakerin, Eric Davis, Gerald Cleaver   +10 more
doaj   +1 more source

Curvature Invariants for the Accelerating Natário Warp Drive

Particles, 2020
A process for using curvature invariants is applied to evaluate the accelerating Natário warp drive. Curvature invariants are independent of coordinate bases and plotting the invariants is free of coordinate mapping distortions.
Brandon Mattingly, Abinash Kar, Matthew Gorban, William Julius, Cooper K. Watson, M.D. Ali, Andrew Baas, Caleb Elmore, Jeffrey S. Lee, Bahram Shakerin, Eric W. Davis, Gerald B. Cleaver   +11 more
doaj   +1 more source

Borel resummation of secular divergences in stochastic inflation

Journal of High Energy Physics, 2023
We make use of Borel resummation to extract the exact time dependence from the divergent series found in the context of stochastic inflation. Correlation functions of self-interacting scalar fields in de Sitter spacetime are known to develop secular IR ...
Masazumi Honda, Ryusuke Jinno, Lucas Pinol, Koki Tokeshi   +3 more
doaj   +1 more source

Investigation of the quantum vacuum as an energy sink for subcritical and supercritical vaporization lasers

Heliyon, 2020
In this paper, it is shown that the quantum electrodynamic vacuum particle production rate by a vaporization laser is negligible and is not a significant energy sink at electric field strengths beyond the Schwinger Limit.
Jeffrey S. Lee, Gerald B. Cleaver
doaj   +1 more source

Aether SUSY breaking: can aether be alternative to F-term SUSY breaking?

Journal of High Energy Physics, 2021
We investigate supersymmetry (SUSY) breaking scenarios where both SUSY and Lorentz symmetry are broken spontaneously. For concreteness, we propose models in which scalar fluid or vector condensation breaks Lorentz symmetry and accordingly SUSY.
Yusuke Yamada
doaj   +1 more source

New description of the scaling evolution of the cosmological magneto-hydrodynamic system

Physics Letters B, 2023
We present a new description of cosmological evolution of the primordial magnetic field under the condition that it is non-helical and its energy density is larger than the kinetic energy density.
Fumio Uchida, Motoko Fujiwara, Kohei Kamada, Jun'ichi Yokoyama   +3 more
doaj   +1 more source