get_subsystem_density_matrix
get_subsystem_density_matrix(statevector, trace_systems)
Compute the reduced density matrix of a quantum subsystem.
Parameters
- statevector (list|array) – The state vector of the complete system
- trace_systems (list|range) – The indices of the qubits to be traced out.
Returns
The reduced density matrix for the desired subsystem
Return type
numpy.ndarray
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