  Conductance fluctuations, localization and statistics of Lyapunov exponents
are studied numerically in pure metallic wires with rough boundaries
(quasi-ballistic wires). We find that the correlation energy of conductance
fluctuations scales anomalously with the sample dimensions, indicating the role
of L\'{e}vy flights. Application of a magnetic field deflects the L\'{e}vy
flights which reduces the localization length. This deflection also breaks the
geometrical flux cancellation and restores the usual Aharonov-Bohm type
magneto-conductance fluctuations.
