Orthogonalization of fermion k -body operators and representability
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DOI: 10.1103/physreva.99.042109
Abstract: The reduced k-particle density matrix of a density matrix on finite-dimensional, fermion Fock space can be defined as the image under the orthogonal projection in the Hilbert-Schmidt geometry onto the space of k-body observables. A… read more here.
Keywords: orthogonalization fermion; body; body operators; orthonormal basis ... See more keywords
In-medium similarity renormalization group with three-body operators
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DOI: 10.1103/physrevc.103.044318
Abstract: Over the past decade the in-medium similarity renormalization group (IMSRG) approach has proven to be a powerful and versatile ab initio many-body method for studying medium-mass nuclei. So far, the IMSRG was limited to the… read more here.
Keywords: renormalization group; medium similarity; body; body operators ... See more keywords
Quenching of nuclear matrix elements for $0νββ$ decay by chiral two-body currents
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DOI: 10.1103/physrevc.98.031301
Abstract: We examine the leading effects of two-body weak currents from chiral effective field theory on the matrix elements governing neutrinoless double-beta decay. In the closure approximation these effects are generated by the product of a… read more here.
Keywords: quenching nuclear; body operators; nuclear matrix; two body ... See more keywords