| dc.rights.license | CC-BY-NC-ND | |
| dc.contributor.advisor | Vandoren, S.J.G. | |
| dc.contributor.author | Manos, Konstantinos | |
| dc.date.accessioned | 2023-06-06T00:00:47Z | |
| dc.date.available | 2023-06-06T00:00:47Z | |
| dc.date.issued | 2023 | |
| dc.identifier.uri | https://studenttheses.uu.nl/handle/20.500.12932/43972 | |
| dc.description.abstract | The past and the future are tightly linked in conventional quantum mechanics
by unitary evolution. Perhaps too tightly in an expanding spacetime. A tweak to
the theory could let quantum possibilities increase as space expands. The tweak
corresponds in replacing unitary quantum mechanical time evolution with a nonunitary
isometric one. Cosmological expansion points into this direction since new
degrees of freedom arise during the time evolution. We motivate this hypothesis
from two different approaches, all in 1 + 1 spacetime dimensions: (i) the net entanglement
entropy produced by toy and cosmological models is increasing in time,
(ii) the Lorentzian path integral for a finite elements latticization gives non-unitary
isometric time evolution for a scalar and possibly a fermionic field. | |
| dc.description.sponsorship | Utrecht University | |
| dc.language.iso | EN | |
| dc.subject | The thesis is about quantum mechanical time evolution in a expanding geometry. It turns out to be isometric and non-unitary and this is motivated by two different approaches. One with toy and cosmological models and one with latticization of spacetime. | |
| dc.title | Non-unitary Isometric Quantum Mechanical Time Evolution in Cosmology | |
| dc.type.content | Master Thesis | |
| dc.rights.accessrights | Open Access | |
| dc.subject.courseuu | Theoretical Physics | |
| dc.thesis.id | 17200 | |
