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The fixed-node quantum Monte Carlo (FNQMC) method is one of the most accuratemethods, with which Schrdinger equation could be solved including 80%--100% of thecorrelation energies for the molecules with 2-10 electrons. However, the method hassome imperfections, i.e. (i) parametric numbers are too many to be optimized, (ii) the cuspcondition of the trial function cannot be satisfied.
The fixed-node quantum Monte Carlo (FNQMC) method is one of the most accuratemethods, with which Schrdinger equation could be solved including 80% - 100% of the correlation energies for the molecules with 2-10 electrons. However, the method hassome imperfections , ie (i) parametric numbers are too many to be optimized, (ii) the cuspcondition of the trial function can not be satisfied.