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Classes and methods for quantum states.
Classes
class QuantumState: A quantum state.
Functions
bloch_vector_from_state_vector(...): Returns the bloch vector of a qubit.
density_matrix(...): Create a QuantumState object from a density matrix.
density_matrix_from_state_vector(...): Returns the density matrix of the state vector.
dirac_notation(...): Returns the state vector as a string in Dirac notation.
eye_tensor(...): Returns an identity matrix reshaped into a tensor.
infer_qid_shape(...): Infer the qid shape of a set of states.
one_hot(...): Returns a numpy array with all 0s and a single non-zero entry(default 1).
quantum_state(...): Create a QuantumState object from a state-like object.
to_valid_density_matrix(...): Verifies the density_matrix_rep is valid and converts it to ndarray form.
to_valid_state_vector(...): Verifies the state_rep is valid and converts it to ndarray form.
validate_density_matrix(...): Checks that the given density matrix is valid.
validate_indices(...): Validates that the indices have values within range of num_qubits.
validate_normalized_state_vector(...): Checks that the given state vector is valid.
validate_qid_shape(...): Validates the size of the given state_vector against the given shape.