qiskit/releasenotes/notes/0.20/add-xxminusyy-gate-63e6530c...

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---
features:
- |
Added a new gate class :class:`~qiskit.circuit.library.XXMinusYYGate`
to the circuit library (:mod:`qiskit.circuit.library`) for the XX-YY
interaction. This gate can be used to implement the
`bSwap gate <https://arxiv.org/abs/1208.1287>`__ and its powers. It also
arises in the simulation of superconducting fermionic models.