Numerical study of primordial magnetic field amplification by inflation-produced gravitational waves

Journal Article · Fri Jan 15 04:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.023510· OSTI ID:21409043

Kuroyanagi, Sachiko ^[1]; Tashiro, Hiroyuki ^[2]; Sugiyama, Naoshi ^[1]

---

1. Department of Physics, Nagoya University, Chikusa, Nagoya 464-8602 (Japan)
2. Institut d'Astrophysique Spatiale, Universite Paris-Sud XI and CNR, Orsay, F-91405 (France)

We numerically study the interaction of inflation-produced magnetic fields with gravitational waves, both of which originate from quantum fluctuations during inflation. The resonance between the magnetic field perturbations and the gravitational waves has been suggested as a possible mechanism for magnetic field amplification. However, some analytical studies suggest that the effect of the inflationary gravitational waves is too small to provide significant amplification. Our numerical study shows more clearly how the interaction affects the magnetic fields and confirms the weakness of the influence of the gravitational waves. We present an investigation based on the magnetohydrodynamic approximation and take into account the differences of the Alfven speed.

• OSTI ID: 21409043
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 2 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLIFICATION
APPROXIMATIONS
CALCULATION METHODS
COSMOLOGICAL MODELS
DISTURBANCES
FLUCTUATIONS
GRAVITATIONAL WAVES
INFLATIONARY UNIVERSE
INTERACTIONS
MAGNETIC FIELDS
MATHEMATICAL MODELS
MATHEMATICS
NUMERICAL ANALYSIS
PERTURBATION THEORY
RESONANCE
SIMULATION
VARIATIONS
VELOCITY