In‐Medium Similarity Renormalization Group Approach for Closed‐Shell Atoms
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DOI: 10.1002/jcc.70186
Abstract: The in‐medium similarity renormalization group (IMSRG) approach, based on a continuous unitary transformation, has been applied to closed‐shell atoms. The flow equation, which is derived for the Hamiltonian, has been solved along with imaginary‐time or… read more here.
Keywords: shell atoms; medium similarity; similarity renormalization; renormalization group ... 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
Importance truncation for the in-medium similarity renormalization group
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DOI: 10.1103/physrevc.105.034324
Abstract: Ab initio nuclear many-body frameworks require extensive computational resources, especially when targeting heavier nuclei. Importance-truncation (IT) techniques allow one to significantly reduce the dimensionality of the problem by neglecting unimportant contributions to the solution of… read more here.
Keywords: medium similarity; importance truncation; renormalization group; similarity renormalization ... See more keywords
In-medium similarity renormalization group with flowing 3-body operators, and approximations thereof
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DOI: 10.1103/physrevc.110.044316
Abstract: We explore the impact of retaining three-body operators within the in-medium similarity renormalization group (IMSRG), as well as various approximations schemes. After studying two toy problems, idential fermions with a contact interaction and the Lipkin-Meshkov-Glick… read more here.
Keywords: medium similarity; similarity renormalization; renormalization group; body operators ... See more keywords
In-medium similarity renormalization group at finite temperature
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DOI: 10.1103/physrevc.111.044318
Abstract: The study of nuclei at finite temperature is of immense interest for many areas of nuclear astrophysics and nuclear-reaction science. A variety of ab initio methods are now available for computing the properties of nuclei… read more here.
Keywords: temperature; medium similarity; similarity renormalization; renormalization group ... See more keywords