PhysRevD.72.043506.pdf (124.42 kB)
Dynamics of assisted quintessence
journal contribution
posted on 2023-06-08, 08:09 authored by Soo A Kim, Andrew R Liddle, Shinji TsujikawaWe explore the dynamics of assisted quintessence, where more than one scalar field is present with the same potential. For potentials with tracking solutions, the fields naturally approach the same values—in the context of inflation this leads to the assisted inflation phenomenon where several fields can cooperate to drive a period of inflation though none is able to individually. For exponential potentials, we study the fixed points and their stability confirming results already in the literature, and then carry out a numerical analysis to show how assisted quintessence is realized. For inverse power-law potentials, we find by contrast that there is no assisted behavior—indeed those are the unique (monotonic) potentials where several fields together behave just as a single field in the same potential. More generally, we provide an algorithm for generating a single-field potential giving equivalent dynamics to multifield assisted quintessence.
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- Published
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- Published version
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Physical Review DISSN
0556-2821External DOI
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4Volume
72Page range
0435061-0435066Department affiliated with
- Physics and Astronomy Publications
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- Yes
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- Yes
Legacy Posted Date
2012-02-06First Open Access (FOA) Date
2016-03-22First Compliant Deposit (FCD) Date
2017-03-14Usage metrics
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