qiskit/releasenotes/notes/2.0/duration-expr-41b004c2165f5...

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---
features_circuits:
- |
The classical realtime-expressions module :mod:`qiskit.circuit.classical` can now represent
duration using the new types :class:`~.types.Duration`.
The module :mod:`qiskit.circuit` also has a new :class:`~.circuit.Duration` class which
can be used as a literal value within classical expressions.
The :func:`~.expr.lift` function can be used to create a value expression from a
:class:`~.circuit.Duration` instance::
from qiskit.circuit import Duration
from qiskit.circuit.classical import expr
expr.lift(Duration.dt(1000))
# Value(Duration.dt(1000), Duration())