# Flaminia Giacomini

Yvonne Choquet-Bruhat Fellow

Perimeter Institute for Theoretical Physics

Areas of research:

### Research Interests

In my research I address, with techniques proper of the fields of Quantum Information and Quantum Foundations, problems related to the interplay between quantum mechanics and gravity. In particular, I have focussed on some features that could arise as a consequence of a non-classical structure of the spacetime: indefiniteness of causality relations and generalised transformations between two reference frames in a quantum relation with each other. In addition, I am interested in the low-energy effects that a quantum theory of gravity would manifest, which could be in the reach of short- to mid-term experimental technologies.

### Positions Held

### Awards

- Winner of the "Pio Picchi" Prize of the Italian Physical Society
- First prize in the Gravity Research Foundation 2019 Essays on Gravitation with the essay "Information Content of the Gravitational Field of a Quantum Superposition" (shared with the coauthors A. Belenchia, R. M. Wald, E. Castro Ruiz, C. Brukner, M. Aspelmeyer)

### Recent Publications

- E. Castro Ruiz, F. Giacomini, A. Belenchia, C. Brukner, "Quantum clocks and the temporal localisability of events in the presence of gravitating quantum systems", Nat. Commun. 11, 2672 (2020)
- A. Vanrietvelde, P. A. Höhn, F. Giacomini, E. Castro Ruiz, "A change of perspective: switching quantum reference frames via a perspective-neutral framework", Quantum 4, 225 (2020)
- A. Belenchia, R. M. Wald, F. Giacomini, E. Castro Ruiz, C. Brukner, M. Aspelmeyer, "Information Content of the Gravitational Field of a Quantum Superposition", IJMPD 28(14), 1943001 (2019)
- F. Giacomini, E. Castro Ruiz, C. Brukner, "Relativistic quantum reference frames: the operational meaning of spin", Phys. Rev. Lett. 123, 090404 (2019)
- F. Giacomini, E. Castro Ruiz, C. Brukner, "Quantum mechanics and the covariance of physical laws in quantum reference frames", Nat. Commun. 10, 494 (2019)
- A. Belenchia, R. M. Wald, F. Giacomini, E. Castro Ruiz, C. Brukner, M. Aspelmeyer, "Quantum superposition of massive objects and the quantization of gravity", Phys. Rev. D 98, 126009 (2018)
- G. Amelino Camelia, F. Giacomini, G. Gubitosi, "Thermal and spectral dimension of (generalized) Snyder noncommutative spacetimes", Phys. Lett B 784, 50-55 (2018)
- E. Castro Ruiz, F. Giacomini, C. Brukner, "Dynamics of quantum causal structures", Phys. Rev. X 8, 011047 (2018)
- E. Castro Ruiz, F. Giacomini, C. Brukner, "Entanglement of quantum clocks through gravity", PNAS 114, E2303 (2017)
- F. Giacomini, E. Castro Ruiz, C. Brukner, "Indefinite causal structures for continuous-variable systems", New J Phys 18, 113026 (2016)
- L. F. Streiter, F. Giacomini, C. Brukner, "A Relativistic Bell Test within Quantum Reference Frames", preprint at arXiv:quant-ph/2008.03317 (2020)
- V. Baumann*, F. Del Santo*, A. R. H. Smith*, F. Giacomini, E. Castro Ruiz, C. Brukner, "Generalized probability rules from a timeless formulation of Wigner"s friend scenarios" preprint at arXiv:quant-ph/1911.09696 (2019)
- A. Vanrietvelde, P. A. Höhn, F. Giacomini, "Switching quantum reference frames in the N-body problem and the absence of global relational perspectives", preprint at arXiv:quant-ph/1809.05093, (2018);

### Seminars

- Invited talk at the Workshop "Causality in the quantum world", Capri, Italy
- Invited talk at the Workshop "Observers in quantum gravity II", Naples, Italy
- Invited talk at the Conference "Quantum Information Revolution: Impact to Foundations", Växjö, Sweden
- Invited talk at the Workshop "New Directions in the Foundations of Physics", Viterbo, Italy
- Invited talk at the "Mini-Workshop on the Foundations of Quantum Mechanics", Vienna, Austria
- Invited talk at the "Quantum Maiwar Workshop", Brisbane, Australia
- Invited talk at the "Gravity in the quantum regime Workshop", Dartmouth College, Hanover (NH), USA
- Invited talk at the "Interplay of quantum information, foundations and gravity Workshop", Vienna, Austria
- Invited talk at the "Spacetime and Information Workshop", Manitoulin Island, Ontario, Canada