Disformal invariance of continuous media with linear equation of state

Journal Article · Wed Feb 01 00:00:00 EST 2017 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2017/02/004· OSTI ID:22680052

Celoria, Marco ^[1]; Matarrese, Sabino ^[2]; Pilo, Luigi ^[3]

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1. Gran Sasso Science Institute (INFN), Viale Francesco Crispi 7, L'Aquila, I-67100 Italy (Italy)
2. Dipartimento di Fisica e Astronomia 'G. Galilei', Università degli Studi di Padova, via Marzolo 8, Padova, I-35131 Italy (Italy)
3. Dipartimento di Fisica, Università di L'Aquila, L'Aquila, I-67010 Italy (Italy)

We show that the effective theory describing single component continuous media with a linear and constant equation of state of the form p = w ρ is invariant under a 1-parameter family of continuous disformal transformations. In the special case of w =1/3 (ultrarelativistic gas), such a family reduces to conformal transformations. As examples, perfect fluids, irrotational dust (mimetic matter) and homogeneous and isotropic solids are discussed.

• OSTI ID: 22680052
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 02; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
EQUATIONS OF STATE
INVARIANCE PRINCIPLES
MATHEMATICAL MODELS
RELATIVISTIC RANGE
TRANSFORMATIONS