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The zoo plot meets ...
The zoo plot meets the swampland : mutual (in)consistency of single-field inflation, string conjectures, and cosmological data
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- Kinney, William H. (author)
- Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),University at Buffalo, United States of America,Oskar Klein Centre for Cosmoparticle Physics, Department of Physics, Stockholm University, Stockholm, Sweden; Department of Physics, University at Buffalo, USA
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- Vagnozzi, Sunny (author)
- Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),Nordiska institutet för teoretisk fysik (Nordita),Oskar Klein Centre for Cosmoparticle Physics, Department of Physics, Stockholm University, Stockholm, Sweden; Nordic Institute for Theoretical Physics (NORDITA), Stockholm, Sweden
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- Visinelli, Luca (author)
- Uppsala universitet,Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),Nordiska institutet för teoretisk fysik (Nordita),University of Uppsala, Sweden,Teoretisk fysik,Oskar Klein Centre for Cosmoparticle Physics, Department of Physics, Stockholm University, Stockholm, Sweden; Nordic Institute for Theoretical Physics (NORDITA), Stockholm, Sweden
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(creator_code:org_t)
- 2019-05-13
- 2019
- English.
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In: Classical and quantum gravity. - : IOP Publishing. - 0264-9381 .- 1361-6382. ; 36:11
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Abstract
Subject headings
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- We consider single-field inflation in light of string-motivated 'swampland' conjectures suggesting that effective scalar field theories with a consistent UV completion must have field excursion Delta(phi) less than or similar to M-Pl, in combination with a sufficiently steep potential, MPlV phi/V greater than or similar to O(1). Here, we show that the swampland conjectures are inconsistent with existing observational constraints on single-field inflation. Focusing on the observationally favoured class of concave potentials, we map the allowed swampland region onto the n(S)-r 'zoo plot' of inflationary models, and find that consistency with the Planck satellite and BICEP2/Keck Array requires MPlV phi/V less than or similar to 0.1 and -0.02 less than or similar to M-Pl(2)/V-phi phi < 0, in strong tension with swampland conjectures. Extension to non-canonical models such as DBI Inflation does not significantly weaken the bound.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Keyword
- cosmic inflation
- cosmic microwave background
- swampland conjectures
- Quantum Science & Technology
Publication and Content Type
- ref (subject category)
- art (subject category)
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