Conserved currents in supersymmetric quantum cosmology?
Jun, 199615 pages
Published in:
- Int.J.Mod.Phys.D 6 (1997) 625-641
e-Print:
- gr-qc/9606047 [gr-qc]
Report number:
- DAMTP-R-96-14
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Abstract: (arXiv)
In this paper we investigate whether conserved currents can be sensibly defined in supersymmetric minisuperspaces. Our analysis deals with k=1 FRW and Bianchi class--A models. Supermatter in the form of scalar supermultiplets is included in the former. Moreover, we restrict ourselves to the first-order differential equations derived from the Lorentz and supersymmetry constraints. The ``square-root'' structure of N=1 supergravity was our motivation to contemplate this interesting research. We show that conserved currents cannot be adequately established except for some very simple scenarios. Otherwise, conservation equations may only be obtained from Wheeler-DeWitt--like equations, which are derived from the supersymmetric algebra of constraints. Two appendices are included. In appendix A we describe some interesting features of quantum FRW cosmologies with complex scalar fields when supersymmetry is present. In particular, we explain how the Hartle-Hawking state can now be satisfactorily identified. In appendix B we initiate a discussion about the retrieval of classical properties from supersymmetric quantum cosmologies.Note:
- Extended version of report written for 1996 Awards for Essays on Gravitation
- quantum cosmology: superspace
- current: conservation law
- space-time: Bianchi
- space-time: Robertson-Walker
- Friedman model
- supersymmetry: multiplet
- multiplet: supersymmetry
- Wheeler-DeWitt equation
- supergravity
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