qiskit/releasenotes/notes/0.21/qiskit-toqm-41bd0f3b6760df6...

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---
features:
- |
Added a new layout and routing method to :func:`.transpile` based on the paper
`"Time-optimal qubit mapping" <https://dl.acm.org/doi/10.1145/3445814.3446706>`__.
To use it, the optional package
`Qiskit TOQM <https://github.com/qiskit-toqm/qiskit-toqm>`__ must be
installed. The ``routing_method`` kwarg of
:func:`~qiskit.compiler.transpile` supports an additional value, ``'toqm'``
which is used to enable layout and routing via TOQM.
To install ``qiskit-toqm`` along with Terra, run:
.. code-block::
pip install qiskit-terra[toqm]