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Quantum Effects in Early Universe Cosmology

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

Scalar lumps with two horizons (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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? (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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 (opens in new window)

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

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

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