PhysRevD.77.023522.pdf (119.76 kB)
Stability of multifield cosmological solutions
journal contribution
posted on 2023-06-07, 23:50 authored by Gianluca Calcagni, Andrew R LiddleWe explore the stability properties of multifield solutions of assisted inflation type, where several fields collectively evolve to the same configuration. In the case of noninteracting fields, we show that the condition for such solutions to be stable is less restrictive than that required for tracking in quintessence models. Our results, which do not rely on the slow-roll approximation, further indicate that to linear order in homogeneous perturbations the fields are in fact unaware of each other's existence. We end by generalizing our results to some cases of interacting fields and to other background solutions and dynamics, including the high-energy braneworld.
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- Published
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Physical Review DISSN
1550-7998Publisher
American Physical SocietyExternal DOI
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2Volume
77Department affiliated with
- Physics and Astronomy Publications
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Article Number: 023522Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2012-02-06First Open Access (FOA) Date
2016-03-22First Compliant Deposit (FCD) Date
2016-11-10Usage metrics
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