Towards a holographic description of cosmology: Renormalisation of the energy-momentum tensor of the dual QFT

Joseph K. L. Lee; Luigi Del Debbio; Andreas Jüttner; Antonin Portelli; Kostas Skenderis

doi:10.22323/1.363.0027

Towards a holographic description of cosmology: Renormalisation of the energy-momentum tensor of the dual QFT

Joseph K. L. Lee, Luigi Del Debbio, Andreas Jüttner, Antonin Portelli, Kostas Skenderis

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract / Description of output

In the holographic approach to cosmology, cosmological observables are described in terms of correlators of a three-dimensional boundary quantum field theory. As a concrete model, we study the 3d massless SU(N) scalar matrix field theory. In this work, we focus on the renormalisation of the energy-momentum tensor 2-point function, which can be related to the CMB power spectra. Here we present a non-perturbative procedure to remove divergences resulting from the loss of translational invariance on the lattice, by imposing Ward identities. This will allow us to make predictions for the CMB power spectra in the regime where the dual QFT is non-perturbative.

Original language	English
Title of host publication	37th International Symposium on Lattice Field Theory (LATTICE2019)
Publisher	Sissa Medialab Srl
Number of pages	7
Volume	363
DOIs	https://doi.org/10.22323/1.363.0027
Publication status	Published - 27 Aug 2020
Event	37th International Conference on Lattice Field Theory, LATTICE 2019 - Wuhan, China Duration: 16 Jun 2019 → 22 Jun 2019 Conference number: 37 https://indico.cern.ch/event/764552/

Publication series

Name	Proceedings of Science
Publisher	Sissa Medilab
ISSN (Electronic)	1824-8039

Conference

Conference	37th International Conference on Lattice Field Theory, LATTICE 2019
Country/Territory	China
City	Wuhan
Period	16/06/19 → 22/06/19
Internet address	https://indico.cern.ch/event/764552/

Access to Document

10.22323/1.363.0027Licence: Creative Commons: Attribution-NonCommercial-NoDerivatives (CC BY-NC-ND)

LATTICE2019_027Final published version, 287 KBLicence: Creative Commons: Attribution-NonCommercial-NoDerivatives (CC BY-NC-ND)

https://pos.sissa.it/363/027Licence: Creative Commons: Attribution-NonCommercial-NoDerivatives (CC BY-NC-ND)

Search for new physics through lattice simulations
Portelli, A.
EU government bodies
1/10/17 → 30/09/23
Project: Research
High-performance computing at the high-energy frontier: results for the LHC
Del Debbio, L.
UK-based charities
1/01/15 → 31/12/19
Project: Research

Cite this

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title = "Towards a holographic description of cosmology: Renormalisation of the energy-momentum tensor of the dual QFT",

abstract = "In the holographic approach to cosmology, cosmological observables are described in terms of correlators of a three-dimensional boundary quantum field theory. As a concrete model, we study the 3d massless SU(N) scalar matrix field theory. In this work, we focus on the renormalisation of the energy-momentum tensor 2-point function, which can be related to the CMB power spectra. Here we present a non-perturbative procedure to remove divergences resulting from the loss of translational invariance on the lattice, by imposing Ward identities. This will allow us to make predictions for the CMB power spectra in the regime where the dual QFT is non-perturbative.",

author = "Lee, {Joseph K. L.} and Debbio, {Luigi Del} and Andreas J{\"u}ttner and Antonin Portelli and Kostas Skenderis",

note = "A.P. and J.K.L.L. are funded in part by the European Research Council (ERC) under the European Union{\textquoteright}s Horizon 2020 research and innovation programme under grant agreement No 757646. J.K.L.L. is also partly funded by the Croucher foundation through the Croucher Scholarships for Doctoral Study. A.J. and K.S. received funding from STFC consolidated grant ST/P000711/1. L.D.D. is supported by an STFC Consolidated Grant, ST/P0000630/1, and a Royal Society Wolfson Research Merit Award, WM140078. Lattice computations presented in this work has been performed using the Cambridge Service for Data Driven Discovery (CSD3), part of which is operated by the University of Cambridge Research Computing on behalf of the STFC DiRAC HPC National e-Infrastructure; 37th International Conference on Lattice Field Theory, LATTICE 2019 ; Conference date: 16-06-2019 Through 22-06-2019",

year = "2020",

month = aug,

day = "27",

doi = "10.22323/1.363.0027",

language = "English",

volume = "363",

series = "Proceedings of Science",

publisher = "Sissa Medialab Srl",

booktitle = "37th International Symposium on Lattice Field Theory (LATTICE2019)",

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}

Lee, JKL , Debbio, LD, Jüttner, A, Portelli, A & Skenderis, K 2020, Towards a holographic description of cosmology: Renormalisation of the energy-momentum tensor of the dual QFT. in 37th International Symposium on Lattice Field Theory (LATTICE2019). vol. 363, Proceedings of Science, Sissa Medialab Srl, 37th International Conference on Lattice Field Theory, LATTICE 2019, Wuhan, China, 16/06/19. https://doi.org/10.22323/1.363.0027

Towards a holographic description of cosmology: Renormalisation of the energy-momentum tensor of the dual QFT. / Lee, Joseph K. L.; Debbio, Luigi Del; Jüttner, Andreas et al.
37th International Symposium on Lattice Field Theory (LATTICE2019). Vol. 363 Sissa Medialab Srl, 2020. (Proceedings of Science).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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T1 - Towards a holographic description of cosmology: Renormalisation of the energy-momentum tensor of the dual QFT

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AU - Jüttner, Andreas

AU - Portelli, Antonin

AU - Skenderis, Kostas

N1 - Conference code: 37

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AB - In the holographic approach to cosmology, cosmological observables are described in terms of correlators of a three-dimensional boundary quantum field theory. As a concrete model, we study the 3d massless SU(N) scalar matrix field theory. In this work, we focus on the renormalisation of the energy-momentum tensor 2-point function, which can be related to the CMB power spectra. Here we present a non-perturbative procedure to remove divergences resulting from the loss of translational invariance on the lattice, by imposing Ward identities. This will allow us to make predictions for the CMB power spectra in the regime where the dual QFT is non-perturbative.

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DO - 10.22323/1.363.0027

M3 - Conference contribution

VL - 363

T3 - Proceedings of Science

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PB - Sissa Medialab Srl

T2 - 37th International Conference on Lattice Field Theory, LATTICE 2019

Y2 - 16 June 2019 through 22 June 2019

ER -

Towards a holographic description of cosmology: Renormalisation of the energy-momentum tensor of the dual QFT

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Projects

Search for new physics through lattice simulations

High-performance computing at the high-energy frontier: results for the LHC

Cite this