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Loll works on developing a theory of quantum gravity, reconciling the beautiful geometric description of space and time laid out in Einstein's theory of General Relativity with the insight that all of physics at its most fundamental level must be described by quantum laws of motion. She is one of the pioneers of a new approach to the nonperturbative quantization of gravity, that of Causal Dynamical Triangulations which in recent times has produced a number of remarkable results. These include a dynamical derivation of the fact that space-time is four-dimensional (something that can be taken for granted only in classical gravity) and that it has the shape of a de Sitter Universe (like our own universe in the absence of matter), and of the so-called wave function of the universe which plays an important role in understanding the quantum behaviour of the very early universe. Remarkably, one also finds that the dimensionality of spacetime reduces smoothly to two at short distances, indicative of a highly nonclassical behaviour of spacetime geometry near the Planck scale. These results are obtained by superposing elementary quantum excitations of geometry which have a causal structure (allowing us to distinguish between cause and effect) built into them at the very smallest scale.
Loll is recipient of a VICI award by the Netherlands Organisation for Scientific Research (NWO). She is Editorial Board member and Subject Editor of the international journal Living Reviews in Relativity, and Editor of Combinatorics, Physics and their Interactions (Annales de l'institut Henri Poincare D). Loll is member of the Royal Netherlands Academy of Arts and Sciences (KNAW), of the Academia Europaea and of the Council for Natural Sciences and Engineering of the KNAW. She also is an elected fellow of the International Society of General Relativity and Gravitation.
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Computer Physics Communicationspp.109170, (2024)
arxiv(2023)
R. Loll, A. Silva
PHYSICAL REVIEW Dno. 8 (2023)
arxiv(2023)
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