Difference between revisions of "Lm2lin.m"

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(Created page with "Converts L,M spin state specification to linear indexing specification. In the linear indexing convention, the states are listed in the order of inc reasing L rank, and, with...")
 
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Converts L,M spin state specification to linear indexing specification.  
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{{DISPLAYTITLE:lm2lin.m}} __NOTOC__
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In the linear indexing convention, the states are listed in the order of
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Converts L,M indexing of spin states into linear indexing. In the linear indexing convention, spin states are listed in the order of increasing L rank, and, within ranks, in the order of decreasing M projection. Zero base counting is used:
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inc reasing L rank, and, within ranks, in the order of decreasing M pro-
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jection. Syntax: I=lm2lin(L,M)
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                  (L=0,M=0) -> I=0
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                  (L=1,M=1) -> I=1
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                  (L=1,M=0) -> I=2, et cetera...
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==Syntax==
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    I=lm2lin(L,M)
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==Arguments==
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    L  - ranks of the spin states
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    M  - projections of the spin states
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==Outputs==
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    I  - linear indices of spin states, with
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          I=0 corresponding to L=0, M=0.
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==Notes==
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See the [[Appendix_B:_spin_state_indexing|state indexing]] section for further information about how ''Spinach'' enumerates spherical tensor states.
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==See also==
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[[lin2lm.m]], [[lin2lmn.m]], [[lmn2lin.m]], [[irr_sph_ten.m]]
  
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WARNING - zero base indexing, that is:
 
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                          (L=0,M=0) -> I=0
 
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                          (L=1,M=1) -> I=1
 
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                          (L=1,M=0) -> I=2, et cetera...
 
  
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Arrays of any dimension are accepted as arguments.
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''Version 2.3, authors: [[Ilya Kuprov]]''

Revision as of 15:03, 28 December 2018

Converts L,M indexing of spin states into linear indexing. In the linear indexing convention, spin states are listed in the order of increasing L rank, and, within ranks, in the order of decreasing M projection. Zero base counting is used:

                 (L=0,M=0) -> I=0
                 (L=1,M=1) -> I=1
                 (L=1,M=0) -> I=2, et cetera...

Syntax

    I=lm2lin(L,M)

Arguments

    L   - ranks of the spin states

    M   - projections of the spin states

Outputs

    I   - linear indices of spin states, with
          I=0 corresponding to L=0, M=0.

Notes

See the state indexing section for further information about how Spinach enumerates spherical tensor states.

See also

lin2lm.m, lin2lmn.m, lmn2lin.m, irr_sph_ten.m


Version 2.3, authors: Ilya Kuprov