Cosmological complexity

Show simple item record

dc.contributor.author Bhattacharyya, Arpan
dc.contributor.author Das, Saurya
dc.contributor.author Haque, S. Shajidul
dc.contributor.author Underwood, Bret
dc.date.accessioned 2020-06-05T13:50:51Z
dc.date.available 2020-06-05T13:50:51Z
dc.date.issued 2020-05
dc.identifier.citation Bhattacharyya, Arpan; Das, Saurya; Haque, S. Shajidul and Underwood, Bret, "Cosmological complexity", Physical Review D, DOI: 10.1103/PhysRevD.101.106020, vol. 101, no. 10, May 2020. en_US
dc.identifier.issn 2470-0010
dc.identifier.issn 2470-0029
dc.identifier.uri https://doi.org/10.1103/PhysRevD.101.106020
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/5443
dc.description.abstract We compute the quantum circuit complexity of the evolution of scalar curvature perturbations on expanding backgrounds, using the language of squeezed vacuum states. In particular, we construct a simple cosmological model consisting of an early-time period of de Sitter expansion followed by a radiation-dominated era and track the evolution of complexity throughout this history. During early-time de Sitter expansion the complexity grows linearly with the number of e-folds for modes outside the horizon. The evolution of complexity also suggests that the Universe behaves like a chaotic system during this era, for which we propose a scrambling time and Lyapunov exponent. During the radiation-dominated era, however, the complexity decreases until it "freezes in" after horizon reentry, leading to a "decomplexification" of the Universe.
dc.description.statementofresponsibility by Arpan Bhattacharyya, Saurya Das, S. Shajidul Haque and Bret Underwood
dc.language.iso en_US en_US
dc.publisher American Physical Society en_US
dc.title Cosmological complexity en_US
dc.type Article en_US
dc.relation.journal Physical Review D


Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search Digital Repository


Browse

My Account