English

Recurrence and differential relations for spherical spinors

Mathematical Physics 2011-05-25 v1 High Energy Physics - Theory math.MP Nuclear Theory Quantum Physics

Abstract

We present a comprehensive table of recurrence and differential relations obeyed by spin one-half spherical spinors (spinor spherical harmonics) Ωκμ(n)\Omega_{\kappa\mu}(\mathbf{n}) used in relativistic atomic, molecular, and solid state physics, as well as in relativistic quantum chemistry. First, we list finite expansions in the spherical spinor basis of the expressions ABΩκμ(n)\mathbf{A}\cdot\mathbf{B}\,\Omega_{\kappa\mu}(\mathbf{n}) and {A(B×C)Ωκμ(n)\mathbf{A}\cdot(\mathbf{B}\times\mathbf{C})\, \Omega_{\kappa\mu}(\mathbf{n})}, where A\mathbf{A}, B\mathbf{B}, and C\mathbf{C} are either of the following vectors or vector operators: n=r/r\mathbf{n}=\mathbf{r}/r (the radial unit vector), e0\mathbf{e}_{0}, e±1\mathbf{e}_{\pm1} (the spherical, or cyclic, versors), σ\boldsymbol{\sigma} (the 2×22\times2 Pauli matrix vector), L^=ir×I\hat{\mathbf{L}}=-i\mathbf{r}\times\boldsymbol{\nabla}I (the dimensionless orbital angular momentum operator; II is the 2×22\times2 unit matrix), J^=L^+1/2σ\hat{\mathbf{J}}=\hat{\mathbf{L}}+1/2\boldsymbol{\sigma} (the dimensionless total angular momentum operator). Then, we list finite expansions in the spherical spinor basis of the expressions ABF(r)Ωκμ(n)\mathbf{A}\cdot\mathbf{B}\,F(r)\Omega_{\kappa\mu}(\mathbf{n}) and A(B×C)F(r)Ωκμ(n)\mathbf{A}\cdot(\mathbf{B}\times\mathbf{C})\, F(r)\Omega_{\kappa\mu}(\mathbf{n}), where at least one of the objects A\mathbf{A}, B\mathbf{B}, C\mathbf{C} is the nabla operator \boldsymbol{\nabla}, while the remaining ones are chosen from the set n\mathbf{n}, e0\mathbf{e}_{0}, e±1\mathbf{e}_{\pm1}, σ\boldsymbol{\sigma}, L^\hat{\mathbf{L}}, J^\hat{\mathbf{J}}.

Keywords

Cite

@article{arxiv.1011.3433,
  title  = {Recurrence and differential relations for spherical spinors},
  author = {Radosław Szmytkowski},
  journal= {arXiv preprint arXiv:1011.3433},
  year   = {2011}
}

Comments

LaTeX, 12 pages

R2 v1 2026-06-21T16:44:00.335Z