Details
| Original language | English |
|---|---|
| Article number | 97 |
| Journal | Journal of high energy physics |
| Volume | 2023 |
| Issue number | 1 |
| Publication status | Published - 18 Jan 2023 |
Abstract
We evaluate the Average Null Energy Condition (ANEC) on momentum eigenstates generated by the stress tensor in perturbative λ ϕ4 and general spacetime dimension. We first compute the norm of the stress-tensor state at second order in λ; as a by-product of the derivation we obtain the full expression for the stress tensor 2-point function at this order. We then compute the ANEC expectation value to first order in λ, which also depends on the coupling of the stress-tensor improvement term ξ. We study the bounds on these couplings that follow from the ANEC and unitarity at first order in perturbation theory. These bounds are stronger than unitarity in some regions of coupling space.
Keywords
- Effective Field Theories, Field Theories in Lower Dimensions, Renormalization and Regularization
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Nuclear and High Energy Physics
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In: Journal of high energy physics, Vol. 2023, No. 1, 97, 18.01.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - ANEC on stress-tensor states in perturbative λ ϕ 4 theory
AU - Bautista, Teresa
AU - Casarin, Lorenzo
N1 - The work of TB has been supported by STFC grants ST/P000258/1 and ST/T000759/1. LC thanks the hospitality of the Theoretical Physics group at King’s College London, where part of the work was done. TB thanks the Max Planck Institute for Gravitational Physics for their hospitality while the work was being completed.
PY - 2023/1/18
Y1 - 2023/1/18
N2 - We evaluate the Average Null Energy Condition (ANEC) on momentum eigenstates generated by the stress tensor in perturbative λ ϕ4 and general spacetime dimension. We first compute the norm of the stress-tensor state at second order in λ; as a by-product of the derivation we obtain the full expression for the stress tensor 2-point function at this order. We then compute the ANEC expectation value to first order in λ, which also depends on the coupling of the stress-tensor improvement term ξ. We study the bounds on these couplings that follow from the ANEC and unitarity at first order in perturbation theory. These bounds are stronger than unitarity in some regions of coupling space.
AB - We evaluate the Average Null Energy Condition (ANEC) on momentum eigenstates generated by the stress tensor in perturbative λ ϕ4 and general spacetime dimension. We first compute the norm of the stress-tensor state at second order in λ; as a by-product of the derivation we obtain the full expression for the stress tensor 2-point function at this order. We then compute the ANEC expectation value to first order in λ, which also depends on the coupling of the stress-tensor improvement term ξ. We study the bounds on these couplings that follow from the ANEC and unitarity at first order in perturbation theory. These bounds are stronger than unitarity in some regions of coupling space.
KW - Effective Field Theories
KW - Field Theories in Lower Dimensions
KW - Renormalization and Regularization
UR - http://www.scopus.com/inward/record.url?scp=85146550309&partnerID=8YFLogxK
U2 - 10.1007/JHEP01(2023)097
DO - 10.1007/JHEP01(2023)097
M3 - Article
AN - SCOPUS:85146550309
VL - 2023
JO - Journal of high energy physics
JF - Journal of high energy physics
SN - 1029-8479
IS - 1
M1 - 97
ER -