Items where authors include "Gielen, S."

Article

Gielen, S. orcid.org/0000-0002-8653-5430 and Nash, E. orcid.org/0000-0002-3775-2113 (2024) Unimodular Plebański gravity. Classical and Quantum Gravity, 41 (8). 085009. ISSN 0264-9381

Calcinari, A. orcid.org/0000-0003-3028-0587 and Gielen, S. orcid.org/0000-0002-8653-5430 (2024) Generalized Gaussian states in group field theory and su(1,1) quantum cosmology. Physical Review D, 109 (6). 066022. ISSN 2470-0010

Alexandre, B. orcid.org/0000-0002-7631-815X, Gielen, S. orcid.org/0000-0002-8653-5430 and Magueijo, J. orcid.org/0000-0003-1408-3313 (2024) Overall signature of the metric and the cosmological constant. Journal of Cosmology and Astroparticle Physics, 2024 (02). 036-036. ISSN 1475-7516

Gielen, S. orcid.org/0000-0002-8653-5430 and Santacruz, R. (2023) Stationary cosmology in group field theory. Physical Review D, 108 (2). 026001. ISSN 2470-0010

Gielen, S. orcid.org/0000-0002-8653-5430 and Nash, E. orcid.org/0000-0002-3775-2113 (2023) Quantum cosmology of pure connection general relativity. Classical and Quantum Gravity, 40 (11). 115009. ISSN 0264-9381

Calcinari, A. orcid.org/0000-0003-3028-0587 and Gielen, S. orcid.org/0000-0002-8653-5430 (2023) Towards anisotropic cosmology in group field theory. Classical and Quantum Gravity, 40 (8). 085004. ISSN 0264-9381

Gielen, S. orcid.org/0000-0002-8653-5430 and Magueijo, J. (2023) Quantum resolution of the cosmological singularity without new physics. Europhysics Letters, 141 (5). ISSN 0295-5075

Gielen, S. orcid.org/0000-0002-8653-5430 and Magueijo, J. (2023) Quantum analysis of the recent cosmological bounce in the comoving Hubble length. Physical Review D, 107 (2). 023518. ISSN 1550-7998

Gielen, S. orcid.org/0000-0002-8653-5430 and Mickel, L. orcid.org/0000-0002-6749-8494 (2022) Gauge-Invariant perturbations at a quantum gravity bounce. Universe, 9 (1). 29. ISSN 2218-1997

Gielen, S. orcid.org/0000-0002-8653-5430 and Menéndez-Pidal, L. (2022) Unitarity and quantum resolution of gravitational singularities. International Journal of Modern Physics D. ISSN 0218-2718

Gielen, S. orcid.org/0000-0002-8653-5430, Marchetti, L., Oriti, D. et al. (1 more author) (2022) Effective cosmology from one-body operators in group field theory. Classical and Quantum Gravity, 39 (7). 075002. ISSN 0264-9381

Gielen, S. orcid.org/0000-0002-8653-5430 and Menéndez-Pidal, L. (2022) Unitarity, clock dependence and quantum recollapse in quantum cosmology. Classical and Quantum Gravity, 39 (7). 075011. ISSN 0264-9381

Dittrich, B., Gielen, S. orcid.org/0000-0002-8653-5430 and Schander, S. (2022) Lorentzian quantum cosmology goes simplicial. Classical and Quantum Gravity, 39 (3). 035012. ISSN 0264-9381

Gielen, S. orcid.org/0000-0002-8653-5430 (2021) Frozen formalism and canonical quantization in (group) field theory. Physical Review D, 104 (10). 106011. ISSN 2470-0010

Gielen, S. orcid.org/0000-0002-8653-5430 and Polaczek, A. (2021) Hamiltonian group field theory with multiple scalar matter fields. Physical Review D, 103 (8). 086011. ISSN 2470-0010

Gielen, S. orcid.org/0000-0002-8653-5430 and Menéndez-Pidal, L. (2020) Singularity resolution depends on the clock. Classical and Quantum Gravity, 37 (20). 205018. ISSN 0264-9381

Gielen, S. orcid.org/0000-0002-8653-5430 and Polaczek, A. (2020) Generalised effective cosmology from group field theory. Classical and Quantum Gravity, 37 (16). 165004. ISSN 0264-9381

Carrozza, S., Gielen, S. orcid.org/0000-0002-8653-5430 and Oriti, D. (2020) Editorial for the special issue “progress in group field theory and related quantum gravity formalisms”. Universe, 6 (1). 19.

Gielen, S. orcid.org/0000-0002-8653-5430, Polaczek, A. and Wilson-Ewing, E. (2019) Addendum to "Relational Hamiltonian for group field theory". Physical Review D, 100 (10). ISSN 2470-0010

Gielen, S. orcid.org/0000-0002-8653-5430 (2019) Inhomogeneous universe from group field theory condensate. Journal of Cosmology and Astroparticle Physics, 2019 (02).

Gielen, S. orcid.org/0000-0002-8653-5430 and Oriti, D. (2018) Cosmological perturbations from full quantum gravity. Physical Review D - Particles, Fields, Gravitation, and Cosmology, 98 (10). ISSN 1550-7998

Gielen, S. orcid.org/0000-0002-8653-5430, de León Ardón, R. and Percacci, R. (2018) Gravity with more or less gauging. Classical and Quantum Gravity, 35 (19). ISSN 0264-9381

Gielen, S. orcid.org/0000-0002-8653-5430 (2018) Group field theory and its cosmology in a matter reference frame. Universe, 4 (10). 103.

Adjei, E., Gielen, S. orcid.org/0000-0002-8653-5430 and Wieland, W. (2018) Cosmological evolution as squeezing : a toy model for group field cosmology. Classical and Quantum Gravity, 35 (10). 105016. ISSN 0264-9381

Gielen, S. orcid.org/0000-0002-8653-5430 and Turok, N. (2017) Quantum propagation across cosmological singularities. Physical Review D, 95 (10). ISSN 2470-0010

Gielen, S. orcid.org/0000-0002-8653-5430 (2016) Emergence of a low spin phase in group field theory condensates. Classical and Quantum Gravity, 33 (22). ISSN 0264-9381

Gielen, S. orcid.org/0000-0002-8653-5430 and Sindoni, L. (2016) Quantum cosmology from group field theory condensates : a review. Symmetry, Integrability and Geometry: Methods and Applications (SIGMA), 12 (2016). 082. ISSN 1815-0659

Gielen, S. orcid.org/0000-0002-8653-5430 and Turok, N. (2016) Perfect quantum cosmological bounce. Physical Review Letters, 117 (2). ISSN 0031-9007

Gielen, S. orcid.org/0000-0002-8653-5430 (2015) Identifying cosmological perturbations in group field theory condensates. Journal of High Energy Physics, 2015 (8).

Gielen, S. orcid.org/0000-0002-8653-5430 (2015) Perturbing a quantum gravity condensate. Physical Review D - Particles, Fields, Gravitation, and Cosmology, 91 (4). ISSN 2470-0010

Gielen, S. orcid.org/0000-0002-8653-5430 and Oriti, D. (2014) Quantum cosmology from quantum gravity condensates : cosmological variables and lattice-refined dynamics. New Journal of Physics, 16 (12). 123004. ISSN 1367-2630

Gielen, S. orcid.org/0000-0002-8653-5430 (2014) Quantum cosmology of (loop) quantum gravity condensates : an example. Classical and Quantum Gravity, 31 (15). ISSN 0264-9381

Gielen, S. orcid.org/0000-0002-8653-5430, Oriti, D. and Sindoni, L. (2014) Homogeneous cosmologies as group field theory condensates. Journal of High Energy Physics, 2014 (6). 13. ISSN 1126-6708

Gielen, S. orcid.org/0000-0002-8653-5430 (2013) Contracted Lorentz invariance for gravity with a preferred foliation. Physical Review D, 88 (6). ISSN 2470-0010

Gielen, S. orcid.org/0000-0002-8653-5430 (2013) Comment on “Causality-violating Higgs singlets at the LHC”. Physical Review D, 88 (6). ISSN 2470-0010

Gielen, S. orcid.org/0000-0002-8653-5430 and Wise, D.K. (2013) Lifting general relativity to observer space. Journal of Mathematical Physics, 54 (5). ISSN 0022-2488

Gielen, S. orcid.org/0000-0002-8653-5430 and Wise, D.K. (2012) Linking covariant and canonical general relativity via local observers. General Relativity and Gravitation, 44 (12). pp. 3103-3109. ISSN 0001-7701

Calcagni, G., Gielen, S. orcid.org/0000-0002-8653-5430 and Oriti, D. (2012) Group field cosmology : a cosmological field theory of quantum geometry. Classical and Quantum Gravity, 29 (10). ISSN 0264-9381

Gielen, S. orcid.org/0000-0002-8653-5430 and Wise, D.K. (2012) Spontaneously broken Lorentz symmetry for Hamiltonian gravity. Physical Review D, 85 (10). ISSN 2470-0010

Gielen, S. orcid.org/0000-0002-8653-5430 (2011) The space of connections as the arena for (quantum) gravity. Symmetry, Integrability and Geometry: Methods and Applications (SIGMA), 7 (2011). 104. ISSN 1815-0659

Calcagni, G., Gielen, S. orcid.org/0000-0002-8653-5430 and Oriti, D. (2011) Two-point functions in (loop) quantum cosmology. Classical and Quantum Gravity, 28 (12). ISSN 0264-9381

Gielen, S. orcid.org/0000-0002-8653-5430 and Oriti, D. (2010) Classical general relativity as BF-Plebanski theory with linear constraints. Classical and Quantum Gravity, 27 (18). ISSN 0264-9381

Gielen, S. orcid.org/0000-0002-8653-5430 (2010) CP violation makes left-right symmetric extensions with non-Hermitian mass matrices appear unnatural. Physical Review D, 81 (7). ISSN 2470-0010

Gielen, S. (2009) Does black hole evaporation imply that physics is nonunitary, and if so, what must the laws of physics look like? International Journal of Quantum Information, 07 (05). pp. 847-878. ISSN 0219-7499

Gibbons, G.W. and Gielen, S. orcid.org/0000-0002-8653-5430 (2009) Deformed general relativity and torsion. Classical and Quantum Gravity, 26 (13). ISSN 0264-9381

Gibbons, G.W., Gielen, S. orcid.org/0000-0002-8653-5430, Pope, C.N. et al. (1 more author) (2009) Naturalness of CP violation in the standard model. Physical Review Letters, 102 (12). ISSN 0031-9007

Gibbons, G.W., Gielen, S. orcid.org/0000-0002-8653-5430, Pope, C.N. et al. (1 more author) (2009) Measures on mixing angles. Physical Review D, 79 (1). ISSN 2470-0010

Gibbons, G.W. and Gielen, S. orcid.org/0000-0002-8653-5430 (2008) The Petrov and Kaigorodov–Ozsváth solutions : spacetime as a group manifold. Classical and Quantum Gravity, 25 (16). ISSN 0264-9381