Jun 2–6, 2025
Perimeter Institute for Theoretical Physics
America/Toronto timezone

Origins of Thermalization in Quantum Cosmology

Jun 6, 2025, 2:10 p.m.
5m
PI/1-119 - Atrium (Perimeter Institute for Theoretical Physics)

PI/1-119 - Atrium

Perimeter Institute for Theoretical Physics

205

Speaker

Mr Michael Osei (University of Lethbridge)

Description

We investigate how accelerated frames influence the cosmic evolution of a semi-classical universe
and propose that these effects can lead to thermalization at the quantum cosmological level. Our
primary research question is whether transformations in super-space, the configuration space of
the gravitational field can yield a mixed (and thus thermal) density matrix for the universe.
To address this, we apply a specific change of coordinates in super-space and analyze the WKB
wavefunction, revealing that it undergoes a Bogoliubov transformation. This transformation, in
turn, generates a mixed density matrix, signifying the emergence of thermal behavior.
Notably, our approach clarifies that this thermalization does not mirror the standard concept of
particle creation in uniformly accelerated (Rindler) observers; rather, it reflects a subtler
phenomenon linked to the geometry of super-space itself. We further demonstrate that the superspace transformation can be viewed as a double Rindler transformation of real space-time
coordinates, highlighting the deep geometric parallels between cosmological and accelerated
frames. These results suggest that acceleration-driven thermalization may play an important role
in semi-classical cosmology, offering new insights into how quantum and geometric effects
intertwine to shape the early universe.

Presenter's Name Michael Osei
Presenter's Email Address [email protected]
Recording Permission YES
Virtual Audience Permission YES
Event Photography I understand

Author

Mr Michael Osei (University of Lethbridge)

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