TY - RPRT TI - Classical and quantum Hamiltonian ratchets. AU - H Schanz AU - M F Otto AU - R Ketzmerick AU - T Dittrich PY - 2001 DO - 10.1103/physrevlett.87.070601 UR - https://pubmed.ncbi.nlm.nih.gov/11497875/ ID - 11497875 ER -