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5:00 PM (CET) 2 February 2020. Prof. Dr. JÉRÔME MARTIN (Institut d'Astrophysique de Paris)

Can we show that CMB anisotropies are of Quantum-mechanical origin?

According to the theory of cosmic inflation, the large scale structures observed in our Universe (galaxies, clusters of galaxies, Cosmic Background Microwave - CMB - anisotropy . . . ) are of quantum mechanical origin. They are nothing but vacuum fluctuations, stretched to cosmological scales by the cosmic expansion and amplified by gravitational instability.
At the end of inflation, these perturbations are placed in a two-mode squeezed state with the strongest squeezing ever produced in Nature (much larger than anything that can be made in the laboratory on Earth). In this talk, we will study whether astrophysical observations could unambiguously reveal this quantum origin by borrowing ideas from quantum information theory. It will be argued that cosmic inflation is not only a successful paradigm to understand the early Universe but is also an interesting playground to discuss foundational issues in Quantum Mechanics.


Thank you for your interest in our research. Get in touch with us for any questions or comments regarding research in the interface of quantum mechanics, field theory and gravity.

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