Non-perturbative unitarity and fictitious ghosts in quantum gravity

Research output: Contribution to journal › Journal article › Research › peer-review

Standard

Non-perturbative unitarity and fictitious ghosts in quantum gravity. / Platania, Alessia; Wetterich, Christof.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 811, 135911, 10.12.2020.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Platania, A & Wetterich, C 2020, 'Non-perturbative unitarity and fictitious ghosts in quantum gravity', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 811, 135911. https://doi.org/10.1016/j.physletb.2020.135911

APA

Platania, A., & Wetterich, C. (2020). Non-perturbative unitarity and fictitious ghosts in quantum gravity. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 811, [135911]. https://doi.org/10.1016/j.physletb.2020.135911

Vancouver

Platania A, Wetterich C. Non-perturbative unitarity and fictitious ghosts in quantum gravity. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2020 Dec 10;811. 135911. https://doi.org/10.1016/j.physletb.2020.135911

Author

Platania, Alessia ; Wetterich, Christof. / Non-perturbative unitarity and fictitious ghosts in quantum gravity. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2020 ; Vol. 811.

Bibtex

@article{91f155609bb743c798dfee8f2dba354a,
title = "Non-perturbative unitarity and fictitious ghosts in quantum gravity",
abstract = "We discuss aspects of non-perturbative unitarity in quantum field theory. The additional ghost degrees of freedom arising in “truncations” of an effective action at a finite order in derivatives could be fictitious degrees of freedom. Their contributions to the fully-dressed propagator – the residues of the corresponding ghost-like poles – vanish once all operators compatible with the symmetry of the theory are included in the effective action. These “fake ghosts” do not indicate a violation of unitarity.",
author = "Alessia Platania and Christof Wetterich",
note = "Funding Information: The authors thank D. Anselmi, J. Donoghue and A. Eichhorn for insightful discussions, and A. Eichhorn for initial inputs on the development of this work. The research of AP is supported by the Alexander von Humboldt Foundation . Publisher Copyright: {\textcopyright} 2020 The Author(s)",
year = "2020",
month = dec,
day = "10",
doi = "10.1016/j.physletb.2020.135911",
language = "English",
volume = "811",
journal = "Physics Letters B: Particle Physics, Nuclear Physics and Cosmology",
issn = "0370-2693",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Non-perturbative unitarity and fictitious ghosts in quantum gravity

AU - Platania, Alessia

AU - Wetterich, Christof

N1 - Funding Information: The authors thank D. Anselmi, J. Donoghue and A. Eichhorn for insightful discussions, and A. Eichhorn for initial inputs on the development of this work. The research of AP is supported by the Alexander von Humboldt Foundation . Publisher Copyright: © 2020 The Author(s)

PY - 2020/12/10

Y1 - 2020/12/10

N2 - We discuss aspects of non-perturbative unitarity in quantum field theory. The additional ghost degrees of freedom arising in “truncations” of an effective action at a finite order in derivatives could be fictitious degrees of freedom. Their contributions to the fully-dressed propagator – the residues of the corresponding ghost-like poles – vanish once all operators compatible with the symmetry of the theory are included in the effective action. These “fake ghosts” do not indicate a violation of unitarity.

AB - We discuss aspects of non-perturbative unitarity in quantum field theory. The additional ghost degrees of freedom arising in “truncations” of an effective action at a finite order in derivatives could be fictitious degrees of freedom. Their contributions to the fully-dressed propagator – the residues of the corresponding ghost-like poles – vanish once all operators compatible with the symmetry of the theory are included in the effective action. These “fake ghosts” do not indicate a violation of unitarity.

UR - http://www.scopus.com/inward/record.url?scp=85096160602&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2020.135911

DO - 10.1016/j.physletb.2020.135911

M3 - Journal article

AN - SCOPUS:85096160602

VL - 811

JO - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

JF - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

SN - 0370-2693

M1 - 135911

ER -

ID: 388513212