qiskit/releasenotes/notes/0.18/add-pauli-list-5644d695f91d...

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---
features:
- |
A new class, :class:`~qiskit.quantum_info.PauliList`, has been added to
the :mod:`qiskit.quantum_info` module. This class is used to
efficiently represent a list of :class:`~qiskit.quantum_info.Pauli`
operators. This new class inherits from the same parent class as the
existing :class:`~qiskit.quantum_info.PauliTable` (and therefore can be
mostly used interchangeably), however it differs from the
:class:`~qiskit.quantum_info.PauliTable`
because the :class:`qiskit.quantum_info.PauliList` class
can handle Z4 phases.