  The well-known geometric phase present in the quantum adiabatic evolution
discovered by Berry many years ago has its analogue, the Hannay phase, in the
classical domain.We calculate the Berry phase with examples for quantum
hermitian and non-hermitian $PT$-symmetric Hamiltonians and compare with the
Hannay phase in their classical equivalents.We use the analogy to propose
resonant electric circuits which reproduce the theoretical solutions in
simulated laboratory experiments.
