 04379 P. Exner, T. Ichinose, H. Neidhardt, and V.A. Zagrebnov
 New product formulae and quantum Zeno dynamics with generalized
observables
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Nov 9, 04

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Abstract. We demonstrate a pair of new product formulae which combine a
projection with a resolvent of a positive operator, or with an
exponential function and spectral projections, respectively. The
convergence is strong or even operatornorm under more restrictive
assumptions. The second mentioned formula can be used to describe
Zeno dynamics in the situation when the usual nondecay
measurement is replaced by a particular generalized observable in
the sense of Davies.
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