KdV ADIABATIC INDEX SOLITONS IN BAROTROPIC OPEN FRW COSMOLOGIES
نویسندگان
چکیده
منابع مشابه
KdV ADIABATIC INDEX SOLITONS IN BAROTROPIC OPEN FRW COSMOLOGIES
for the log derivative of the FRW scale factor, the famous Hubble parameterH(η) = da/dη a . The independent variable is the conformal time η, c is simply related to the adiabatic index of the cosmological fluid, c = 3 2 γ − 1 which was assumed constant by Faraoni, and κ = 0,±1 is the curvature index of the flat, closed, open FRW universe, respectively. For the mathematical considerations of thi...
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where a is the scale factor of the universe, ρ and p are the energy density and the pressure, respectively, of the perfect fluid of which a classical universe is usually assumed to be made of, κ = 0,±1 is the curvature index of the flat, closed, open universe, respectively, and γ is the constant adiabatic index of the cosmological fluid. Recently, Faraoni, proposed the “Riccati route” of solvin...
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ژورنال
عنوان ژورنال: Modern Physics Letters A
سال: 2002
ISSN: 0217-7323,1793-6632
DOI: 10.1142/s0217732302006898