riassunto2

AT2 -

Speaker

Tumulka, Roderich

Coauthors

Goldstein, Sheldon; Struyve, Ward

Talk Title

The Bohmian Approach to the Problems of Cosmological Quantum Fluctuations

Abstract

Two problems arise from quantum fluctuations in cosmology. First, how do the seeds for galaxy formation in the early universe (an asymmetric state) arise from a symmetric superposition without an external observer? Second, why don’t Boltzmann brains (random agglomerates of particles that, by extreme coincidence, form functioning brains) occur from vacuum fluctuations in the late universe, given that also extremely unlikely events do occur if time is infinite (or just long enough)? I explain why in the Bohmian version of quantum theory, the undesirable Boltzmann brains do not occur, while inhomogeneous seeds for structure formation, a desirable kind of fluctuation, do.

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