PauliSum

class braket.quantum_information.pauli_sum.PauliSum(terms=())[source]

Bases: object

A weighted sum of Pauli strings.

Parameters:: terms (Iterable[tuple[Number, str | PauliString]])

Initializes a PauliSum.

Parameters:: terms (Iterable[tuple[Number, str | PauliString]]) – Pairs of coefficient and Pauli string.

property all_terms_commute: bool

Whether all terms in the sum commute with each other.

classmethod from_list(terms)[source]

Builds a PauliSum from a list of weighted Pauli strings.

Parameters:: terms (Iterable[tuple[Number, str | PauliString]])
Return type:: PauliSum

property terms: tuple[tuple[Number, PauliString], ...]

The weighted Pauli terms.

property qubit_count: int

The number of qubits in the largest Pauli string term.

Returns a list representation of the weighted Pauli strings.

Converts the weighted Pauli strings into a circuit Sum observable.

commutes_with(other)[source]

Returns whether all terms commute with other.

is_self_commuting()[source]

Returns whether all terms in this sum commute with each other.

classmethod from_sum(observable_sum)[source]

Builds a PauliSum from a circuit Sum observable.