On applying the subspace perturbation theory to few-body Hamiltonians
classification
🪐 quant-ph
math-phmath.MPphysics.atm-clus
keywords
few-bodyhamiltonianshermitianperturbationresultssubspaceapplyingoperator
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We present a selection of results on variation of the spectral subspace of a Hermitian operator under a Hermitian perturbation and show how these results may work for few-body Hamiltonians.
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