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Extended random phase approximation method for atomic excitation energies from correlated and variationally optimized second-order density matrices

Quantum ScienceExcited State PropertyEngineeringSecond-order Density MatricesPhysicsNatural SciencesMonte Carlo MethodCondensed Matter PhysicsApplied PhysicsAtomic PhysicsComputational ChemistryQuantum ChemistryRandom MatrixEnergy MinimizationAtomic Excitation EnergiesAb-initio Method