Projects per year
Abstract / Description of output
Perturbative quantum corrections to primordial power spectra are important for testing the robustness and the regime of validity of inflation as an effective field theory. Although this has been done extensively for the density power spectrum (and, to some extent, for the tensor spectrum) using loop corrections, we do so in an open quantum system approach to the problem. Specifically, we calculate the first order corrections to the primordial gravitational wave spectrum due to (cubic) tensor interactions alone. We show that our results match expectations from standard loop corrections only in the strict Markovian limit, and therefore, establish a systematic way to relax this approximation in the future, as is generally necessary for gravitational systems.
Original language  English 

Article number  225 
Pages (fromto)  133 
Number of pages  33 
Journal  Journal of High Energy Physics 
Volume  2022 
Issue number  8 
DOIs  
Publication status  Published  23 Aug 2022 
Keywords / Materials (for Nontextual outputs)
 hepth
 astroph.CO
 grqc
 Classical Theories of Gravity
 Effective Field Theories
 NonEquilibrium Field Theory
Fingerprint
Dive into the research topics of 'Quantum corrections to the primordial tensor spectrum: open EFTs & Markovian decoupling of UV modes'. Together they form a unique fingerprint.Projects
 1 Finished

Particle Theory at the Higgs Centre
Ball, R., Berera, A., Boyle, P., CallisonBurch, C., Del Debbio, L., Gardi, E., Kennedy, A., O'Connell, D., Zwicky, R., Berera, A., Boyle, P., Buckley, A., Del Debbio, L., Gardi, E., Horsley, R., Kennedy, A., Kenway, R., O'Connell, D., Smillie, J. & Zwicky, R.
1/10/14 → 30/09/18
Project: Research