On the Spectrum of the Many-Body Pauli Projector
Abstract
Spectrum of the Pauli projector of a quantum many-body system is studied. It is proven that the kern of the complete many-body projector is identical to the kern of the sum of two-body projectors. Since the kern of the many-body Pauli projector defines an allowed subspace of the complete Hilbert space, it is argued that a truncation of the many-body model space following the two-body Pauli projectors is a natural way when solving the Schr\"odinger equation for the many-body system. These relations clarify a role of the many-body Pauli forces in a multicluster system.
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