Explore the words cloud of the QLO-QG project. It provides you a very rough idea of what is the project "QLO-QG" about.
The following table provides information about the project.
Coordinator |
UNIVERSITY OF YORK
Organization address contact info |
Coordinator Country | United Kingdom [UK] |
Project website | https://www.york.ac.uk/maths/research/fellowships/markus-b-frob/ |
Total cost | 183˙454 € |
EC max contribution | 183˙454 € (100%) |
Programme |
1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility) |
Code Call | H2020-MSCA-IF-2015 |
Funding Scheme | MSCA-IF-EF-ST |
Starting year | 2016 |
Duration (year-month-day) | from 2016-07-01 to 2018-06-30 |
Take a look of project's partnership.
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1 | UNIVERSITY OF YORK | UK (YORK NORTH YORKSHIRE) | coordinator | 183˙454.00 |
While a full theory of quantum gravity remains yet elusive, one can still make quantum-gravitational predictions by treating gravity perturbatively around a fixed classical background. This approach is particularly important in cosmology, where tree-level predictions have been confirmed in observations, and next-generation experiments measuring the 21-cm hydrogen line are very likely sensitive enough to test loop corrections. The objective of this proposal is the study of correlation functions at fixed geodesic distance. These observables possess two desirable properties: a) they are confined to a region of finite physical size, and thus measurable, so that one can test the predictions of any theory of quantum gravity against them; and b) they are gauge-invariant, and thus can be used to separate physical effects from gauge artefacts in many gauge-fixed loop calculations that have been carried out in cosmology. The main open problem about these observables is how to renormalise them, which has not been solved even at the one-loop order in perturbation theory. To solve this problem, we apply ideas from the study of Wilson loops in non-Abelian gauge theories, the only other nonlocal observable in quantum field theory which has been investigated in detail. Since these observables are also potentially important in AdS/CFT correspondence, we study them for all maximally symmetric spaces, i.e. Minkowski, de Sitter as well as anti-de Sitter spaces.
year | authors and title | journal | last update |
---|---|---|---|
2018 |
Markus B Fröb Gauge-invariant quantum gravitational corrections to correlation functions published pages: 55006, ISSN: 0264-9381, DOI: 10.1088/1361-6382/aaa74c |
Classical and Quantum Gravity 35/5 | 2019-06-13 |
2017 |
Markus B. Fröb, Enric Verdaguer Quantum corrections for spinning particles in de Sitter published pages: 022-022, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2017/04/022 |
Journal of Cosmology and Astroparticle Physics 2017/04 | 2019-06-13 |
2018 |
Markus B Fröb, Thomas-Paul Hack, Igor Khavkine Approaches to linear local gauge-invariant observables in inflationary cosmologies published pages: 115002, ISSN: 0264-9381, DOI: 10.1088/1361-6382/aabcb7 |
Classical and Quantum Gravity 35/11 | 2019-06-13 |
2017 |
Markus B. Fröob, Thomas-Paul Hack, Atsushi Higuchi Compactly supported linearised observables in single-field inflation published pages: 043-043, ISSN: 1475-7516, DOI: 10.1088/1475-7516/2017/07/043 |
Journal of Cosmology and Astroparticle Physics 2017/07 | 2019-06-13 |
2018 |
Markus B Fröb, William C C Lima Propagators for gauge-invariant observables in cosmology published pages: 95010, ISSN: 0264-9381, DOI: 10.1088/1361-6382/aab427 |
Classical and Quantum Gravity 35/9 | 2019-06-13 |
2018 |
Fröb, Markus B. Anomalies in time-ordered products and applications to the BV-BRST formulation of quantum gauge theories published pages: , ISSN: , DOI: |
1 | 2019-06-13 |
2016 |
Markus B. Fröb Quantum gravitational corrections for spinning particles published pages: , ISSN: 1029-8479, DOI: 10.1007/JHEP10(2016)051 |
Journal of High Energy Physics 2016/10 | 2019-06-13 |
2018 |
Fröb, Markus B. One-loop quantum gravitational backreaction on the local Hubble rate published pages: , ISSN: , DOI: |
1 | 2019-06-13 |
2018 |
Markus B. Fröb, Mojtaba Taslimi Tehrani Green’s functions and Hadamard parametrices for vector and tensor fields in general linear covariant gauges published pages: 25022, ISSN: 2470-0010, DOI: 10.1103/PhysRevD.97.025022 |
Physical Review D 97/2 | 2019-06-13 |
2018 |
Markus B Fröb One-loop quantum gravitational corrections to the scalar two-point function at fixed geodesic distance published pages: 35005, ISSN: 0264-9381, DOI: 10.1088/1361-6382/aa9ad1 |
Classical and Quantum Gravity 35/3 | 2019-06-13 |
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