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${it Ab initio}$ path integral Monte Carlo simulations for water trimer with electron correlation effects

Fujita, Takatoshi*; Tanaka, Shigenori*; Fujiwara, Takayuki*; Kusa, Masaaki*; Mochizuki, Yuji*; Shiga, Motoyuki   

We have performed ${it ab initio}$ path integral Monte Carlo simulations for water trimer (H$$_2$$O)$$_3$$ system. The electron correlation effects have been taken into account up to the level of third-order Moller-Plesset (MP3) perturbation theory. Through comparisons of calculated geometrical properties of water trimer such as O-O distance, O-H-O angle, and torsional angle between O-H and O-O-O plane, the interplays among the nuclear quantum, thermal and electron correlation effects are analyzed quantitatively.

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Category:Chemistry, Physical

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