Hydrodynamic fluctuations from a weakly coupled scalar field

Jackson, Gregory Scott; Laine, Mikko Sakari (2018). Hydrodynamic fluctuations from a weakly coupled scalar field. European physical journal. C - particles and fields, 78(4) EDP Sciences 10.1140/epjc/s10052-018-5791-3

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Studies of non-equilibrium dynamics of first-order cosmological phase transitions may involve a scalar field interacting weakly with the energy-momentum tensor of a thermal plasma. At late times, when the scalar field is approaching equilibrium, it experiences both damping and thermal fluctuations. We show that thermal fluctuations induce a shear viscosity and a gravitational wave production rate, and propose that including this tunable contribution may help in calibrating the measurement of the gravitational wave production rate in hydrodynamic simulations. Furthermore it may enrich their physical scope, permitting in particular for a study of the instability of growing bubbles.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Jackson, Gregory Scott and Laine, Mikko Sakari

Subjects:

500 Science > 530 Physics

ISSN:

1434-6044

Publisher:

EDP Sciences

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

14 May 2018 13:57

Last Modified:

24 Oct 2019 00:36

Publisher DOI:

10.1140/epjc/s10052-018-5791-3

ArXiv ID:

1803.01871

BORIS DOI:

10.7892/boris.116466

URI:

https://boris.unibe.ch/id/eprint/116466

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