All of the project’s objectives have been achieved. STRINGFLATION so far results in a total of 46 publications, more are in progress. Due to the character limit, the work is highlighted via the most relevant publications (all on arXiv), also indicating collaborations:
WP2 & 1:
1610.05320: L. McAllister (Cornell U.), P. Schwaller, G. Servant, J. Stout (Utrecht U.) & PI;
1705.08950: G. D’Amico (CERN), N. Kaloper (UC Davis), A. Padilla (Nottingham U.), D. Stefanyszyn (Groningen U.) & PI;
1707.08678: J. Moritz, A. Retolaza & PI;
1805.00944: J. Moritz & T. van Riet;
1809.06618: J. Moritz, A. Retolaza Π
1812.03999: A. Hebecker & S. Leonhardt (both Heidelberg U.), J. Moritz & PI;
1902.01412: F. Carta, J. Moritz & PI;
2003.04902 & publicly available software code performing the relevant classification: F. Carta, J. Moritz & PI; also important for WP1 & WP5
2110.02963: F. Carta (Durham U., UK), A. Mininno (IFT Madrid), N. Righi (QU) & PI;
WP2 & 4:
1512.03768: A. Hebecker (Heidelberg U.), F. Rompineve (Heidelberg U.) & PI;
1807.06579: M. Dias, J. Frazer, A. Retolaza & PI;
WP3:
1810.05199: M. Dias, J. Frazer & PI;
We leveraged machine learning algorithms to directly learn the stochastic map from microscopic inflation model parameters to CMB observables. This in turn allowed us to show that single-field axion monodromy inflation predicts r > 0.015 irrespective of string theory details.
2002.02952: V. Domcke, V. Guidetti (Bologna U.), Y. Welling & PI;
2007.04322: F. Carta, N. Righi (QU), Y. Welling & PI; relevant for WP5 as well
2101.05861 & 2112.13861: G. D’Amico (Parma U.), N. Kaloper (UC Davis) & PI;
The results allowed us to analytically capture the map of the leading ‘theory error’ onto the CM observables. We used this structure to establish the lower bound r > 0.006 for the general string theory derived effective quantum field theory capturing all extant models of axion monodromy inflation. This is the central result of STRINGFLATION in relation to its primary task.
2103.08662 & publicly available software code – python/tensorflow based software package dNNsolve, a new deep neural network architecture to efficiently solve differential equations: V. Guidetti, F. Muia (DAMTP Cambridge, UK), Y. Welling & PI – building on initial experience in 1810.05199.
WP5:
1910.09568: F. Carta, S. Giacomelli (Oxford U.), H. Hayashi (Tokai U.) & R. Savelli (INFN & Rome U.);
2002.07816: F. Carta & A. Mininno (IFT Madrid);
2008.01027: M. Akhond (Swansea U.), F. Carta, S. Dwivedi (SCU, Chengdu), H. Hayashi (Tokai U., Hiratsuka) & S.-S. Kim (Chengdu U. of Sci. Tech.); highly relevant for aspects of WP5, WP1 & WP2
2104.13847: G. Ballesteros (IFT Madrid), A. Ringwald (DESY), C. Tamarit (TUM, Germany) & Y. Welling;
2110.02964: M. Cicoli (Bologna U.), V. Guidetti, N. Righi (QU) & PI;
WP6:
1901.03657: A. Achucarro (Leiden U.), E. J. Copeland (Nottingham U.), O. Iarygina (Leiden U.), G. A. Palma (Chile U.), D.-G. Wang (Leiden U.) & Y. Welling;
1907.02020: A. Achucarro (Leiden U.) & Y. Welling;
1907.02951: Y. Welling;
1908.06956: A. Achucarro (Leiden U.), G. A. Palma (Chile U.), D.-G. Wang (Leiden U.) & Y. Welling;
2101.07272 & publicly available software code + database performing the computation of the database of all genus-0 GV invariants of all CICYs with less than 10 volume moduli: F. Carta (Durham U., UK), A. Mininno (IFT Madrid), N. Righi (QU) & PI; also relevant for WP3
2204.13124: N. Kaloper (UC Davis) & PI;
WP7:
1604.05970: M. Dias, J. Frazer & M. C. D. Marsh (Cambridge U.);
1606.07768: F. Pedro (IFT & UAM Madrid) & PI;
1609.00379: M. Dias, J. Frazer, D. J. Mulryne (Queen Mary U.) & D. Seery (Sussex U.);
1611.07059: F. Pedro (IFT & UAM Madrid) & PI;
1706.03774: M. Dias, J. Frazer & M. C. D. Marsh (Cambridge U.);
1710.08913: S. Hotinli (Imperial Coll.), J. Frazer, A. H. Jaffe (Imperial Coll.), J. Meyers (CITA) & L. C. Price (Carnegie Mellon)
WP8:
1604.05326: B. Broy, D. Croone (Groningen U.) & D. Roest (Groningen U.);
1605.00651: D. Ciupke;
1609.03570: B. Broy;
1707.05830: R. Kallosh (Stanford), A. Linde (Stanford), D. Roest (Groningen U.), Y. Yamada (Stanford) & PI;
1805.02659: M. Dias, J. Frazer, A. Retolaza, M. Scalisi & PI.
WP9 is currently being addressed in collaboration with a new DESY postdoc, J. Leedom. This collaboration is nearing completion with a publication planned for June 2022.