Dr. Luca Marchetti

Personal presentation

I was born in Italy, in 1993. I took my Bachelor's (2015) and Master's (2018) Degrees in Physics at the University of Pisa, both with 110/110 cum laude. During my training as theoretical physicist I developed an interest in gravitation, and, in particular, in the attempts to formulate a quantum theory of gravity. In November 2018 I started my PhD as a cotutelle student from both the University of Pisa and the LMU Munich (supervisors: Daniele Oriti, ASC; and Giancarlo Cella, INFN).
I am interested in the "Quantum Gravity problem" in all its facets, including more conceptual aspects, like the role of time and the emergence of spacetime structures in Quantum Gravity theories, but also phenomenological ones, as the study of Quantum Gravity effects in cosmology and black hole physics, and their possible experimental investigation using innovative detection techniques.

Ongoing projects

• COSMOLOGICAL PERTURBATIONS FROM EFFECTIVE RELATIONAL GFT COSMOLOGY
• PHASE TRANSITIONS IN GFT IN THE LANDAU PERSPECTIVE WITH MATTER REFERENCE FIELDS
• MODIFIED GRAVITATIONAL DYNAMICS FROM ENTROPY CORRECTIONS
• USING CORRELATIONS TO EXPERIMENTALLY SEARCH FOR QUANTUM GRAVITY EFFECTS
• EFFECTIVE RELATIONAL DYNAMICS IN QUANTUM GRAVITY THEORIES
• INTRODUCTION TO PHYSICAL COSMOLOGY

Talks

• "Relational dynamics in an emergent spacetime context", conference "Quantizing time", Perimeter Institute for Theoretical Physics, Waterloo, Canada, 14-18 June, 2021

Publications

• L. Marchetti, D. Oriti, A. G. A. Pithis and J. Th\"urigen, Mean-field phase transitions in TGFT quantum gravity, [arXiv:2211.12768 [gr-qc]]
• L. Marchetti, D. Oriti, A. G. A. Pithis and J. Th\"urigen, Phase transitions in TGFT: a Landau-Ginzburg analysis of Lorentzian quantum geometric models, [arXiv:2209.04297 [gr-qc]]
• L. Marchetti and D. Oriti, Effective dynamics of scalar cosmological perturbations from quantum gravity, JCAP 07, no.07, 004 (2022) [arXiv:2112.12677 [gr-qc]]
• L. Marchetti, D. Oriti, A. G. A. Pithis and J. Th\"urigen, Phase transitions in tensorial group field theories: Landau-Ginzburg analysis of models with both local and non-local degrees of freedom, JHEP 21, 201 (2020) [arXiv:2110.15336 [gr-qc]]
• S. Gielen, L. Marchetti, D. Oriti and A. Polaczek, Effective cosmology from one-body operators in group field theory, Class. Quant. Grav. \textbf{39}, no.7, 075002 (2022) [arXiv:2110.11176 [gr-qc]]
• L. Marchetti and D. Oriti, Quantum Fluctuations in the Effective Relational GFT Cosmology, Front. Astron. Space Sci. 0, 110 (2021) [arXiv:2010.09700 [gr-qc]]
• L. Marchetti and D. Oriti, Effective relational cosmological dynamics from Quantum Gravity, JHEP 05, 025 (2021) [arXiv:2008.02774 [gr-qc]]