Saller MAC Kelly A Richardson JO 2019 Simulating the nonadiabatic dynamics of condensed-phase systems continues to pose a significant challenge for quantum dynamics methods. Approaches based on sampling classical trajectories within the mapping formalism, such as the linearized semiclassical initial value representation (LSC-IVR), can be used to approximate quantum correlation functions in dissipative environments. Such semiclassical methods however commonly fail in quantitatively predicting the electronic-state populations in the long-time limit. Here we present a suggestion to minimize this difficulty by splitting the problem into two parts, one of which involves the identity and treating this operator by quantum-mechanical principles rather than with classical approximations. This strategy is applied to numerical simulations of spin-boson model systems, showing its potential to drastically improve the performance of LSC-IVR and related methods with no change in the equations of motion or the algorithm in general, but rather by simply using different functional forms of the observables. application/pdf https://sonar.ch/global/documents/76033 eng info:eu-repo/semantics/altIdentifier/doi/10.1063/1.5082596 info:eu-repo/semantics/altIdentifier/pmid/30795664 info:eu-repo/semantics/openAccess The Journal of chemical physics. - 2019 Physical and Theoretical Chemistry General Physics and Astronomy On the identity of the identity operator in nonadiabatic linearized semiclassical dynamics. http://purl.org/coar/resource_type/c_6501