symop.ccr.algebra.density.trace¶

Trace of symbolic density polynomials.

Given a density polynomial

\[\rho = \sum_i c_i \, |L_i\rangle\langle R_i|,\]

the trace is computed symbolically as

\[\mathrm{Tr}(\rho) = \sum_i c_i \, \langle L_i \mid R_i \rangle.\]

The bra–ket overlap is evaluated purely symbolically via overlap_right_left().

Functions

Compute the trace of a density polynomial.

density_trace(terms: tuple[DensityTerm, ...]) → complex¶

Compute the trace of a density polynomial.

Evaluates

\[\mathrm{Tr}(\rho) = \sum_i c_i \, \langle L_i \mid R_i \rangle,\]

where each term corresponds to \(c_i |L_i\rangle\langle R_i|\).

Parameters:: terms (tuple[DensityTerm, ...]) – Density terms forming the operator.
Returns:: Complex trace value.
Return type:: complex

Notes