Quantum Effects in Early Universe Cosmology

Project Information

Qosmology

Grant agreement ID: 772295

DOI 10.3030/772295

Project closed

EC signature date 6 March 2018

Start date 1 September 2018

End date 31 March 2024

Funded under

• EXCELLENT SCIENCE - European Research Council (ERC)

Total cost € 1 239 843,75

EU contribution € 1 239 843,75

Coordinated by

MAX-PLANCK-GESELLSCHAFT ZUR FORDERUNG DER WISSENSCHAFTEN EV
Germany

CORDIS provides links to public deliverables and publications of HORIZON projects.

Links to deliverables and publications from FP7 projects, as well as links to some specific result types such as dataset and software, are dynamically retrieved from OpenAIRE .

Publications

Peer reviewed articles (32)

Scalar lumps with two horizons

Author(s): George Lavrelashvili, Jean-Luc Lehners
Published in: Physical Review D, 2022, ISSN 2470-0010
Publisher: APS
DOI: 10.1103/physrevd.105.024051

Quantum aspects of chaos and complexity from bouncing cosmology: A study with two-mode single field squeezed state formalism

Author(s): Parth Bhargava; Sayantan Choudhury; Sayantan Choudhury; Sayantan Choudhury; Satyaki Chowdhury; Satyaki Chowdhury; Anurag Mishara; Sachin Panneer Selvam; Sudhakar Panda; Sudhakar Panda; Gabriel D. Pasquino
Published in: SciPost Physics Core 4(4), 026 (2021). doi:10.21468/SciPostPhysCore.4.4.026, Issue 2, 2021, ISSN 2666-9366
Publisher: SciPost Foundation
DOI: 10.48550/arxiv.2009.03893

Theories with limited extrinsic curvature and a nonsingular anisotropic universe

Author(s): Yuki Sakakihara, Daisuke Yoshida, Kazufumi Takahashi, Jerome Quintin
Published in: Physical Review D, Issue 102/8, 2020, ISSN 2470-0010
Publisher: American Physical Society
DOI: 10.1103/physrevd.102.084004

Quantum Circuit Complexity of Primordial Perturbations

Author(s): Lehners, Jean-Luc; Quintin, Jerome
Published in: Physical Review D, Issue 103, 2021, ISSN 1536-6065
Publisher: American Physical Society
DOI: 10.1103/physrevd.103.063527

Scalar lumps with a horizon

Author(s): George Lavrelashvili, Jean-Luc Lehners, Marc Schneider
Published in: Physical Review D, Issue 104/4, 2021, ISSN 2470-0010
Publisher: APS
DOI: 10.1103/physrevd.104.044007

No-boundary solutions are robust to quantum gravity corrections

Author(s): Caroline Jonas, Jean-Luc Lehners
Published in: Physical Review D, Issue 102/12, 2020, ISSN 2470-0010
Publisher: American Physical Society
DOI: 10.1103/physrevd.102.123539

Allowable complex metrics in minisuperspace quantum cosmology

Author(s): Jean-Luc Lehners
Published in: Physical Review D, 2022, ISSN 2470-0010
Publisher: APS
DOI: 10.1103/physrevd.105.026022

Cuscuton gravity as a classically stable limiting curvature theory

Author(s): Jerome Quintin, Daisuke Yoshida
Published in: Journal of Cosmology and Astroparticle Physics, Issue 2020/02, 2020, Page(s) 016-016, ISSN 1475-7516
Publisher: Institute of Physics
DOI: 10.1088/1475-7516/2020/02/016

Review of the No-Boundary Wave Function

Author(s): Jean-Luc Lehners
Published in: Physics Reports, 2023, ISSN 0370-1573
Publisher: Elsevier BV
DOI: 10.1016/j.physrep.2023.06.002

Uses of complex metrics in cosmology

Author(s): Caroline Jonas, Jean-Luc Lehners, Jerome Quintin
Published in: Journal of High Energy Physics, 2022, ISSN 1029-8479
Publisher: Institute of Physics Publishing
DOI: 10.1007/jhep08(2022)284

Cosmology at the top of the α′ tower

Author(s): Jerome Quintin, Heliudson Bernardo, Guilherme Franzmann
Published in: Journal of High Energy Physics, Issue 2021/7, 2021, ISSN 1029-8479
Publisher: Institute of Physics Publishing
DOI: 10.1007/jhep07(2021)149

Wave function of simple universes analytically continued from negative to positive potentials

Author(s): Jean-Luc Lehners
Published in: Physical Review D, Issue 104/6, 2021, ISSN 2470-0010
Publisher: APS
DOI: 10.1103/physrevd.104.063527

Lessons for quantum cosmology from anti–de Sitter black holes

Author(s): Alice Di Tucci, Michal P. Heller, Jean-Luc Lehners
Published in: Physical Review D, Issue 102/8, 2020, ISSN 2470-0010
Publisher: American Physical Society
DOI: 10.1103/physrevd.102.086011

Nonsingular bounces catalyzed by dark energy

Author(s): Sebastian F. Bramberger, Jean-Luc Lehners
Published in: Physical Review D, Issue 99/12, 2019, ISSN 2470-0010
Publisher: American Physical Society
DOI: 10.1103/PhysRevD.99.123523

Safe beginning for the Universe?

Author(s): Jean-Luc Lehners, K. S. Stelle
Published in: Physical Review D, Issue 100/8, 2019, ISSN 2470-0010
Publisher: American Physical Society
DOI: 10.1103/physrevd.100.083540

Quantum incompleteness of inflation

Author(s): Alice Di Tucci, Job Feldbrugge, Jean-Luc Lehners, Neil Turok
Published in: Physical Review D, Issue 100/6, 2019, ISSN 2470-0010
Publisher: American Physical Society
DOI: 10.1103/PhysRevD.100.063517

No-Boundary Proposal as a Path Integral with Robin Boundary Conditions

Author(s): Alice Di Tucci, Jean-Luc Lehners
Published in: Physical Review Letters, Issue 122/20, 2019, ISSN 0031-9007
Publisher: American Physical Society
DOI: 10.1103/PhysRevLett.122.201302

Homogeneous transitions during inflation: A description in quantum cosmology

Author(s): Sebastian F. Bramberger, Alice Di Tucci, Jean-Luc Lehners
Published in: Physical Review D, Issue 101/6, 2020, ISSN 2470-0010
Publisher: American Physical Society
DOI: 10.1103/PhysRevD.101.063501

Kerr-NUT-de Sitter as an inhomogeneous non-singular bouncing cosmology

Author(s): Andrés Anabalón, Sebastian F. Bramberger, Jean-Luc Lehners
Published in: Journal of High Energy Physics, Issue 2019/9, 2019, ISSN 1029-8479
Publisher: Institute of Physics Publishing
DOI: 10.1007/JHEP09(2019)096

No-boundary prescriptions in Lorentzian quantum cosmology

Author(s): Alice Di Tucci, Jean-Luc Lehners, Laura Sberna
Published in: Physical Review D, Issue 100/12, 2019, ISSN 2470-0010
Publisher: American Physical Society
DOI: 10.1103/physrevd.100.123543

QMetrology from QCosmology: Study with entangled two qubit open quantum system in De Sitter space

Author(s): Sayantan Choudhury, Satyaki Chowdhury, Nitin Gupta, Abinash Swain
Published in: SciPost Physics Core, Issue 4/1, 2021, ISSN 2666-9366
Publisher: SciPost Foundation
DOI: 10.21468/scipostphyscore.4.1.006

Stability of Axion-Dilaton Wormholes

Author(s): Jonas, Caroline; Lavrelashvili, George; Lehners, Jean-Luc
Published in: Physical Review D, Issue 1, 2024, ISSN 1550-7998
Publisher: American Physical Society
DOI: 10.48550/arxiv.2312.08971

A small Universe

Author(s): Jean-Luc Lehners; Jerome Quintin
Published in: Physics Letters B, Issue 4, 2023, ISSN 0370-2693
Publisher: Elsevier BV
DOI: 10.1016/j.physletb.2024.138488

The Generalized OTOC from Supersymmetric Quantum Mechanics—Study of Random Fluctuations from Eigenstate Representation of Correlation Functions

Author(s): Bhagat, K.; Bose, B.; Choudhury, S.; Chowdhury, S.; Das, R.; Dastider, S.; Gupta, N.; Maji, A.; Pasquino, G.; Paul, S.
Published in: Symmetry, Vol 13, Iss 44, p 44 (2021), 2020, ISSN 2073-8994
Publisher: Multidisciplinary Digital Publishing Institute (MDPI)
DOI: 10.3390/sym13010044

Allowable complex scalars from Kaluza-Klein compactifications and metric rescalings

Author(s): Jean-Luc Lehners
Published in: Physical Review D, 2023, ISSN 1536-6065
Publisher: APS
DOI: 10.1103/physrevd.107.046004

Higher-Order Gravity, Finite Action, and a Safe Beginning for the Universe

Author(s): Lehners, Jean-Luc; Stelle, K. S.
Published in: Eur. Phys. J. Plus, Issue 1, 2024, ISSN 2190-5444
Publisher: Springer Science + Business Media
DOI: 10.1140/epjp/s13360-024-05125-y

:THE COSMOLOGICAL OTOC: Formulating New Cosmological Micro-Canonical Correlation Functions for Random Chaotic Fluctuations in Out-Of-Equilibrium Quantum Statistical Field Theory

Author(s): Sayantan Choudhury
Published in: Symmetry, Issue 12/9, 2020, Page(s) 1527, ISSN 2073-8994
Publisher: Multidisciplinary Digital Publishing Institute (MDPI)
DOI: 10.3390/sym12091527

How to create universes with internal flux

Author(s): Jean-Luc Lehners, Rahim Leung, K.S.Stelle
Published in: Physical Review D, 2023, ISSN 2470-0010
Publisher: APS
DOI: 10.1103/physrevd.107.046006

Microphysical manifestations of viscosity and consequences for anisotropies in the very early universe

Author(s): C. Ganguly, Jerome Quintin
Published in: Physical Review D, 2021, ISSN 2470-0010
Publisher: APS
DOI: 10.1103/physrevd.105.023532

Cosmological consequences of a principle of finite amplitudes

Author(s): Caroline Jonas, Jean-Luc Lehners, Jerome Quintin
Published in: Physical Review D, Issue 103/10, 2021, ISSN 2470-0010
Publisher: American Physical Society
DOI: 10.1103/physrevd.103.103525

Revisiting the no-boundary proposal with a scalar field

Author(s): Caroline Jonas, Jean-Luc Lehners, Vincent Meyer
Published in: Physical Review D, 2022, ISSN 2470-0010
Publisher: APS
DOI: 10.1103/physrevd.105.043529

Zoo of axionic wormholes

Author(s): Caroline Jonas; George Lavrelashvili; Jean-Luc Lehners
Published in: Physical Review D, Issue 1, 2023, ISSN 1550-7998
Publisher: American Physical Society
DOI: 10.1103/physrevd.108.066012

Other (3)

Delicate curvature bounces in the no-boundary wave function and in the late universe

Author(s): Jean-Luc Lehners and Jerome Quintin
Published in: 2024
Publisher: arXiv

Cost of holographic path integrals

Author(s): A.~R.~Chandra, J.~de Boer, M.~Flory, M.~P.~Heller, S. Hortner, A.~Rolph
Published in: 2022
Publisher: arXiv

NUTs, Bolts and Stokes Phenomena in the No-Boundary Wave Function

Author(s): Jean-Luc Lehners
Published in: 2024
Publisher: arXiv