PMID- 20095685 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20100325 LR - 20100125 IS - 1089-7690 (Electronic) IS - 0021-9606 (Linking) VI - 132 IP - 2 DP - 2010 Jan 14 TI - Two-dimensional electronic spectra from the hierarchical equations of motion method: Application to model dimers. PG - 024505 LID - 10.1063/1.3293039 [doi] AB - We extend our previous study of absorption line shapes of molecular aggregates using the Liouville space hierarchical equations of motion (HEOM) method [L. P. Chen, R. H. Zheng, Q. Shi, and Y. J. Yan, J. Chem. Phys. 131, 094502 (2009)] to calculate third order optical response functions and two-dimensional electronic spectra of model dimers. As in our previous work, we have focused on the applicability of several approximate methods related to the HEOM method. We show that while the second order perturbative quantum master equations are generally inaccurate in describing the peak shapes and solvation dynamics, they can give reasonable peak amplitude evolution even in the intermediate coupling regime. The stochastic Liouville equation results in good peak shapes, but does not properly describe the excited state dynamics due to the lack of detailed balance. A modified version of the high temperature approximation to the HEOM gives the best agreement with the exact result. FAU - Chen, Liping AU - Chen L AD - Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Beijing 100190, China. FAU - Zheng, Renhui AU - Zheng R FAU - Shi, Qiang AU - Shi Q FAU - Yan, Yijing AU - Yan Y LA - eng PT - Journal Article PL - United States TA - J Chem Phys JT - The Journal of chemical physics JID - 0375360 EDAT- 2010/01/26 06:00 MHDA- 2010/01/26 06:01 CRDT- 2010/01/26 06:00 PHST- 2010/01/26 06:00 [entrez] PHST- 2010/01/26 06:00 [pubmed] PHST- 2010/01/26 06:01 [medline] AID - 10.1063/1.3293039 [doi] PST - ppublish SO - J Chem Phys. 2010 Jan 14;132(2):024505. doi: 10.1063/1.3293039.