Vacuum fluctuations of the supersymmetric field in curved background |
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Authors: | Neven Bili? Silvije Domazet Branko Guberina |
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Institution: | Rudjer Boškovi? Institute, POB 180, HR-10002 Zagreb, Croatia |
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Abstract: | We study a supersymmetric model in curved background spacetime. We calculate the effective action and the vacuum expectation value of the energy momentum tensor using a covariant regularization procedure. A soft supersymmetry breaking induces a nonzero contribution to the vacuum energy density and pressure. Assuming the presence of a cosmic fluid in addition to the vacuum fluctuations of the supersymmetric field an effective equation of state is derived in a self-consistent approach at one loop order. The net effect of the vacuum fluctuations of the supersymmetric fields in the leading adiabatic order is a renormalization of the Newton and cosmological constants. |
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