We study dissipative tunneling in a double well potential that is driven
close to a resonance between the lowest tunnel doublet and a singlet. While the
coherent dynamics can be described well within a three-level approximation,
dissipative transitions to levels outside the singlet and the doublet may play
a crucial role. Moreover, such transitions can enhance the entropy production
significantly.Comment: 12 pages, 7 figures, vch-book.cl