loom.eka.pauli_operator

Copyright 2024 Entropica Labs Pte Ltd

Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

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class loom.eka.pauli_operator.PauliOperator(*args, **kwargs)[source]

Bases: object

A PauliOperator is defined by a pauli string, and a set of data qubits.

Parameters:

  • pauli (str) – The Pauli string that defines this operator.

  • data_qubits (tuple[tuple[int, ...], ...]) – Qubits involved in the operator. They are referred to by their coordinates in the lattice.

  • uuid (str) – Unique identifier of the operator. This is automatically set to a random UUID.

as_signed_pauli_op(all_qubits)[source]

Get the SignedPauliOp representation of the PauliOperator.

Parameters:

all_qubits (tuple[tuple[int, ...], ...]) – All qubits coordinates in the system.

Returns:

The SignedPauliOp representation of the PauliOperator.

Return type:

SignedPauliOp

Raises:

ValueError – If the number of qubits in the system is less than the number of qubits in the operator.

commutes_with(other_operator)[source]

Check if the PauliOperator commutes with another PauliOperator.

Parameters:

other_operator (PauliOperator) – The other PauliOperator to check commutation with.

Returns:

True if the two objects commute, False otherwise.

Return type:

bool

data_qubits: tuple[tuple[int, ...], ...]
static from_signed_pauli_op(signed_pauli_op, index_to_qubit_map)[source]

Create a PauliOperator from a SignedPauliOp.

Parameters:

  • signed_pauli_op (SignedPauliOp) – The SignedPauliOp to convert to a PauliOperator.

  • index_to_qubit_map (dict[int, tuple[int, ...]]) – A dictionary mapping the indices of the SignedPauliOp to the qubit coordinates in the lattice.

Returns:

The PauliOperator representation of the SignedPauliOp.

Return type:

PauliOperator

pauli: str
property pauli_type: str

‘X’, ‘Y’, or ‘Z’.

Type:

Type of the Pauli operator

uuid: str = FieldInfo(annotation=str, required=False, default_factory=<lambda>, validate_default=True)
property weight: int

Number of qubits involved in the operator.