Efficient algorithm for representations of U(3) in U(N)
Efficient algorithm for representations of U(3) in U(N)
复制标题
U(3) 在 U(N) 中表示的高效算法
DOI:
10.1016/j.cpc.2019.05.018
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发表时间:
2019
影响因子:
6.3
通讯作者:
Tvrdík, Pavel
中科院分区:
文献类型:
--
作者:
Langr, Daniel;Dytrych, Tomáš;Draayer, Jerry P.;Launey, Kristina D.;Tvrdík, Pavel
An efficient algorithm for enumerating representations of U (3) that occur in a representation of the unitary group U (N) is introduced. The algorithm is applicable to U (N) representations associated with a system of identical fermions (protons, neutrons, electrons, etc.) distributed among the N=(η+ 1)(η+ 2)∕ 2 degenerate eigenstates of the η th level of the three-dimensional harmonic oscillator. A C++ implementation of the algorithm is provided and its performance is evaluated. The implementation can employ OpenMP threading for use in parallel applications. Program summary Program Title: UNtoU3. h Program files doi: http://dx. doi. org/10.17632/3g4w8f9vdk. 1 Licensing provisions: MIT Programming language: C++ Nature of problem: The determination of the complete set of U (3) irreducible representations (irreps) that occurs in a representation of U (N), where N=(η+ 1)(η+ 2)∕ 2 is the degeneracy of the η th harmonic oscillator shell. Solution method: The resulting set of U (3) irreps is determined by applying a simple difference relation to the U (3) weight distribution of the Gelfand basis states spanning a given U (N) irrep.
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影响因子:
3.1
作者:
H. Yépez;M. Ermamatov;P. Fraser;P. Hess
通讯作者:
P. Hess
DOI:
10.1016/j.cpc.2016.06.006
发表时间:
2016
期刊:
Comput. Phys. Commun.
影响因子:
--
作者:
["T. Dytrych
通讯作者:
["T. Dytrych
影响因子:
4.4
作者:
J. Cseh
通讯作者:
J. Cseh
影响因子:
8.6
作者:
G. Rosensteel;D. Rowe
通讯作者:
G. Rosensteel;D. Rowe
影响因子:
6.3
作者:
J. Draayer;Y. Leschber;S. C. Park;R. López
通讯作者:
R. López