spheres.stars.mixed

Implementation of the “Majorana stars” formalism for mixed states (and operators) of higher spin.

Functions

operator_spherical_decomposition(O[, T_basis])	Decomposes an operator into a linear combination of spherical tensors.
operator_spins(O[, T_basis])	Expresses an operator as a set of spins.
spherical_decomposition_operator(decomposition)	Recomposes an operator from its spherical tensor decomposition.
spherical_decomposition_spins(decomposition)	Expresses the spherical tensor decomposition of an operator as a list of unnormalized, integer \(j\) spin states.
spherical_tensor(j, sigma, mu)	Constructs spherical tensor operator for a given \(j, \sigma, \mu\).
spherical_tensor_basis(j)	Constructs a basis set of spherical tensor operators for a given \(j\), for all \(\sigma\) from \(0\) to \(2j\), and \(\mu\) from \(-\sigma\) to \(\sigma\).
spins_operator(spins[, T_basis])	Recomposes an operator, given a list of spin states.
spins_spherical_decomposition(spins)	Converts a list of spin states back into a dictionary of spherical tensor coefficients.