Difference between revisions of "Deut pair.m"

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  S      - singlet state density matrix in Hilbert space, or state
 
  S      - singlet state density matrix in Hilbert space, or state
 
           vector in Liouville space
 
           vector in Liouville space
 
+
 
  T      - triplet state density matrices in Hilbert space, or state
 
  T      - triplet state density matrices in Hilbert space, or state
 
           vectors in Liouville space, ordered as {T+,T0,T-}
 
           vectors in Liouville space, ordered as {T+,T0,T-}
 
+
 
  Q      - quintet state density matrices in Hilbert space, or state
 
  Q      - quintet state density matrices in Hilbert space, or state
 
           vectors in Liouville space, ordered as {Q++,Q+,Q0,Q-,Q--}
 
           vectors in Liouville space, ordered as {Q++,Q+,Q0,Q-,Q--}
 
+
 
  Tc      - coherences between triplet states:
 
  Tc      - coherences between triplet states:
 
           {T0 -> T-, T+ -> T0, T- -> T0, T0 -> T+}
 
           {T0 -> T-, T+ -> T0, T- -> T0, T0 -> T+}
 
+
 
  Qc      - coherences between quintet states:
 
  Qc      - coherences between quintet states:
 
           {Q- -> Q--, Q0 -> Q-, Q+ -> Q0, Q++ -> Q+, ...
 
           {Q- -> Q--, Q0 -> Q-, Q+ -> Q0, Q++ -> Q+, ...

Revision as of 17:40, 5 June 2026

All possible states of a spin-1 pair, classified by the total spin into singlet, triplet, and quartet.

Syntax

    [S,T,Q,Tc,Qc]=deut_pair(spin_system,spin_a,spin_b,options)

Arguments

   spin_a  - the number of the first spin

   spin_b  - the number of the second spin

   options.dephasing - set to 1 to eliminate the states that are
                       not stationary under Az+Bz Hamiltonian,
                       the default is to keep everything

Outputs

S       - singlet state density matrix in Hilbert space, or state
         vector in Liouville space

T       - triplet state density matrices in Hilbert space, or state
         vectors in Liouville space, ordered as {T+,T0,T-}

Q       - quintet state density matrices in Hilbert space, or state
         vectors in Liouville space, ordered as {Q++,Q+,Q0,Q-,Q--}

Tc      - coherences between triplet states:
         {T0 -> T-, T+ -> T0, T- -> T0, T0 -> T+}

Qc      - coherences between quintet states:
         {Q- -> Q--, Q0 -> Q-, Q+ -> Q0, Q++ -> Q+, ...
          Q-- -> Q-, Q- -> Q0, Q0 -> Q+, Q+ -> Q++}

Notes

The states above are not irreducible spherical tensors; they are Zeeman-state combinations with conventional labels.

See also

Elementary_states

Version 2.11, authors: Ilya Kuprov, Anakin Aden