tlquantum.density_tensor.DensityTensor
- class tlquantum.density_tensor.DensityTensor(tensor, subsystems)[source]
A quantum state container for state and density matrix operations, including partial traces and quantum information metric calculations.
- Parameters:
- tensortt-tensor, state or density matrix
- subsystemslist of ints, system sizes in correspondence of the size of tensor
- Returns:
- DensityTensor
Methods
mutual_information(kept_indices1, kept_indices2)Mutual Information for the partial traces of the specified kept indices.
partial_trace_dm(kept_indices)Partial trace for density matrix.
partial_trace_state(kept_indices)Partial trace for state vector.
vonneumann_entropy(kept_indices)Von Neumann entropy for the partial trace of the density tensor.
- partial_trace_dm(kept_indices)[source]
Partial trace for density matrix.
- Parameters:
- kept_indiceslist of int, indices to not trace over and keep for ptrace
- Returns:
- DensityTensor, result of partial trace
- partial_trace_state(kept_indices)[source]
Partial trace for state vector.
- Parameters:
- kept_indiceslist of int, indices to not trace over and keep for partial trace
- Returns:
- DensityTensor, result of partial trace
- vonneumann_entropy(kept_indices)[source]
Von Neumann entropy for the partial trace of the density tensor.
- Parameters:
- kept_indiceslist of int, indices to not trace over and keep for partial trace
- Returns:
- float, Von Neumann entropy of specified partial trace
- mutual_information(kept_indices1, kept_indices2)[source]
Mutual Information for the partial traces of the specified kept indices.
- Parameters:
- kept_indices1list of int, indices to not trace over and keep for partial trace
- kept_indices2list of int, indices to not trace over and keep for partial trace
- Returns:
- float, Mutual Information of specified partial traces