Speaker
Description
The statistical properties of the CMB anisotropies, reflecting the curvature inhomogeneities in the early Universe, are very well accounted for by assuming that they emerged from amplified vacuum fluctuations. Being the result of a genuine quantum process, it is natural to wonder which properties of these primordial inhomogeneities are quantum, and which, if any, persisted until their observations despite interactions that decohered, i.e. classicalised, them. I will review the latest progress on these questions, emphasising the quantum information approaches.
References:
Martin, J., Micheli, A., & Vennin, V. (2022). Discord and decoherence.Journal of Cosmology and Astroparticle Physics, 2022(04), 051.
https://iopscience.iop.org/article/10.1088/1475-7516/2022/04/051
Micheli, A., & Peter, P. (2023). Quantum Cosmological Gravitational Waves? In C. Bambi, L. Modesto, & I. Shapiro (Eds), Handbook of Quantum Gravity (pp. 1-66).
https://link.springer.com/10.1007/978-981-19-3079-9_10-1
Martin, Jérôme, Amaury Micheli, and Vincent Vennin. 2023. ‘Comparing Quantumness Criteria’. Europhysics Letters 142 (1): 18001. https://doi.org/10.1209/0295-5075/acc3be.