forms the density matrix for an atomic system (list of AtomicState objects) sys.
  • The following options can be given:
TimeDependenceTruewhether density-matrix elements should have explicit time dependence
RepresentationZeemanZeeman or polarization moment representation
DMSymbolsymbol to use for density-matrix elements
DMLabelNoneadditional label for density-matrix elements
ComplexExpandVariablesFalsewhether to express density-matrix elements in terms of real and imaginary parts
TimeVariabletsymbol to use for time variable
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