Quantum fields near phantom-energy ''sudden'' singularities

Calderon, Hector H

doi:10.1103/PHYSREVD.78.044041

Title: Quantum fields near phantom-energy ''sudden'' singularities

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Abstract

This paper is committed to calculations near a type of future singularity driven by phantom energy. At the singularities considered, the scale factor remains finite but its derivative diverges. The general behavior of barotropic phantom energy producing this singularity is calculated under the assumption that near the singularity such fluid is the dominant contributor. We use the semiclassical formula for renormalized stress tensors of conformally invariant fields in conformally flat spacetimes and analyze the softening/enhancing of the singularity due to quantum vacuum contributions. This dynamical analysis is then compared to results from thermodynamical considerations. In both cases, the vacuum states of quantized scalar and spinor fields strengthen the accelerating expansion near the singularity whereas the vacuum states of vector fields weaken it.

Authors:

Calderon, Hector H ^[1]

Department of Physics, Montana State University, Bozeman, Montana, 59717 (United States)

Publication Date:: Fri Aug 15 00:00:00 EDT 2008

OSTI Identifier:: 21250525

Resource Type:: Journal Article

Journal Name:: Physical Review. D, Particles Fields

Additional Journal Information:: Journal Volume: 78; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevD.78.044041; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; FLUIDS; SEMICLASSICAL APPROXIMATION; SINGULARITY; SPACE-TIME; SPINOR FIELDS; VACUUM STATES; VECTOR FIELDS

Citation Formats


                    Calderon, Hector H. Quantum fields near phantom-energy ''sudden'' singularities.  United States: N. p., 2008. 
        Web.  doi:10.1103/PHYSREVD.78.044041.

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                    Calderon, Hector H. Quantum fields near phantom-energy ''sudden'' singularities.  United States.  https://doi.org/10.1103/PHYSREVD.78.044041

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                    Calderon, Hector H. 2008.  
        "Quantum fields near phantom-energy ''sudden'' singularities".  United States.  https://doi.org/10.1103/PHYSREVD.78.044041.

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@article{osti_21250525,

  title        = {Quantum fields near phantom-energy ''sudden'' singularities},

  author       = {Calderon, Hector H},

  abstractNote = {This paper is committed to calculations near a type of future singularity driven by phantom energy. At the singularities considered, the scale factor remains finite but its derivative diverges. The general behavior of barotropic phantom energy producing this singularity is calculated under the assumption that near the singularity such fluid is the dominant contributor. We use the semiclassical formula for renormalized stress tensors of conformally invariant fields in conformally flat spacetimes and analyze the softening/enhancing of the singularity due to quantum vacuum contributions. This dynamical analysis is then compared to results from thermodynamical considerations. In both cases, the vacuum states of quantized scalar and spinor fields strengthen the accelerating expansion near the singularity whereas the vacuum states of vector fields weaken it.},

  doi          = {10.1103/PHYSREVD.78.044041},

  url          = {https://www.osti.gov/biblio/21250525},
  journal      = {Physical Review. D, Particles Fields},

  issn         = {0556-2821},

  number       = 4,

  volume       = 78,

  place        = {United States},

  year         = {Fri Aug 15 00:00:00 EDT 2008},

  month        = {Fri Aug 15 00:00:00 EDT 2008}

}

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