  We investigate a class of operators resulting from a quantization scheme
attributed to Berezin. These so-called Berezin-Toeplitz operators are defined
on a Hilbert space of square-integrable holomorphic sections in a line bundle
over the classical phase space. As a first goal we develop self-adjointness
criteria for Berezin-Toeplitz operators defined via quadratic forms. Then,
following a concept of Daubechies and Klauder, the semigroups generated by
these operators may under certain conditions be represented in the form of
Wiener-regularized path integrals. More explicitly, the integration is taken
over Brownian-motion paths in phase space in the ultra-diffusive limit. All
results are the consequence of a relation between Berezin-Toeplitz operators
and Schrodinger operators defined via certain quadratic forms. The
probabilistic representation is derived in conjunction with a version of the
Feynman-Kac formula.
