Unexciting classical backgrounds

@article{Vachaspati2022UnexcitingCB,
  title={Unexciting classical backgrounds},
  author={Tanmay Vachaspati},
  journal={Physical Review D},
  year={2022}
}
  • T. Vachaspati
  • Published 6 January 2022
  • Mathematics
  • Physical Review D
Quantum fields in time-dependent backgrounds generally lead to particle production. Here we consider “unexciting” backgrounds for which the net particle production vanishes. We start by considering the simple harmonic oscillator and explicitly construct all unexciting time-dependent frequencies. This allows us to construct homogeneous backgrounds in field theory for which there is no particle production in any given mode, though we are able to show that there are no homogeneous backgrounds for… 

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References

SHOWING 1-10 OF 20 REFERENCES

Classical-quantum correspondence for fields

We map the quantum problem of a free bosonic field in a space-time dependent background into a classical problem. N degrees of freedom of a real field in the quantum theory are mapped into 2N2

Quantum Fields in Curved Space

This book presents a comprehensive review of the subject of gravitational effects in quantum field theory. Although the treatment is general, special emphasis is given to the Hawking black hole

A matrix big bang

The light-like linear dilaton background represents a particularly simple time-dependent 1/2 BPS solution of critical type-IIA superstring theory in ten dimensions. Its lift to M-theory, as well as

Kinks and Domain Walls: An Introduction to Classical and Quantum Solitons

Preface 1. Classical kinks 2. Kinks in more complicated models 3. Interactions 4. Kinks in quantum field theory 5. Condensates and zero modes on kinks 6. Formation of kinks 7. Dynamics of domain

Unity of Fundamental Interactions

The vector representation of the linearized gravitational field (the graviton field) or the so called quantum gravitodynamics which describes the motion of masses in a weak gravitational field is

Plane waves do not polarize the vacuum

Gravitational plane waves, like their electromagnetic and Yang-Mills counterparts, are undistorted by vacuum polarization effects to all loop orders, if no cosmological term is induced.

A 8 :

Aims: To examine the predictive effect of dysfunctional metacognitions and trait worry on change in paranoia over one year within a large university sample. Methods: An online survey encompassing

Phys

  • Rev. D 84, 125028
  • 2011

Phys

  • Rev. D 81, 085020
  • 2010

Nucl

  • Phys. B 157, 285 (1979), [Erratum: Nucl.Phys.B 172, 544
  • 1980