Improved many-body expansions from eigenvector continuation
P. Demol, T. Duguet, A. Ekström, Mikaël Frosini, K. Hebeler, S. König, Dean Lee, A. Schwenk, V. Somà, A. Tichai
Abstract
The authors demonstrate that the proposed framework of eigenvector continuation can robustly recover exact values of nuclear observables from a formally divergent low-order perturbative expansion without requiring any analytic knowledge of the expansion. The results illustrate that eigenvector continuation provides an efficient and powerful tool applicable to strongly interacting systems.
Topics & Concepts
ResummationPerturbation theory (quantum mechanics)ContinuationEigenvalues and eigenvectorsStatistical physicsQuantumA priori and a posterioriMany-body problemAnalytic continuationPhysicsTheoretical physicsApplied mathematicsComputer scienceMathematicsQuantum mechanicsQuantum chromodynamicsMathematical analysisPhilosophyEpistemologyProgramming languageNuclear physics research studiesAdvanced Chemical Physics StudiesQuantum Chromodynamics and Particle Interactions