Quadratic bulk viscosity and the topology of space time.

Details Quadratic bulk viscosity and the topology of space time. Quadratic bulk viscosity and the topology of space time.

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997acpsl..47..499w&link_type=abstract

Acta Phys. Slovaca, Vol. 47, No. 6, p. 499 - 504

Physics

Universe: Space-Time

Scientific paper

By considering a homogeneous isotropic universe admitting quadratic bulk viscosity the author shows that if the bulk viscosity coefficient is large the effective topology of space time attains an antiintuitive interpretation in the sense that a positive curvature space time is ever-expanding. This is true for all cosmologies studied except in the case of small quadratic bulk viscosity (3γ+1-kβ ≥ 0, 3γ+1 > 0).

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