Homomorphic Feller Cocycles on a C*-Algebra |
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Authors: | Lindsay J Martin; Wills Stephen J |
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Institution: | School of Mathematical Sciences, University of Nottingham Nottingham NG7 2RD, jml{at}maths.nott.ac.uk
Department of Mathematics, University College Cork, National University of Ireland Ireland, s.wills{at}ucc.ie |
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Abstract: | When a Fock-adapted Feller cocycle on a C*-algebra is regular,completely positive and contractive, it possesses a stochasticgenerator that is necessarily completely bounded. Necessaryand sufficient conditions are given, in the form of a sequenceof identities, for a completely bounded map to generate a weaklymultiplicative cocycle. These are derived from a product formulafor iterated quantum stochastic integrals. Under two alternativeassumptions, one of which covers all previously considered cases,the first identity in the sequence is shown to imply the rest. |
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