TY - RPRT TI - Using the thermal Gaussian approximation for the Boltzmann operator in semiclassical initial value time correlation functions. AU - Jian Liu AU - William H Miller PY - 2006 DO - 10.1063/1.2395941 UR - https://pubmed.ncbi.nlm.nih.gov/17176131/ ID - 17176131 ER -