Data from: Unambiguous discrimination of general quantum operations

The discrimination of quantum operations has long been an intriguing
challenge, with theoretical research significantly advancing our
understanding of the quantum features in discriminating quantum objects.
This challenge is closely related to the discrimination of quantum states,
and proof-of-principle demonstrations of the latter have already been
realized using optical photons. However, the experimental demonstration of
discriminating general quantum operations, including both unitary and
non-unitary operations, has remained elusive. In general quantum systems,
especially those with high dimensions, the preparation of arbitrary
quantum states and the implementation of arbitrary quantum operations and
generalized measurements are non-trivial tasks. Here, for the first time,
we experimentally demonstrate the optimal unambiguous discrimination of up
to 6 displacement operators and the unambiguous discrimination of
non-unitary quantum operations. Our results demonstrate powerful tools for
experimental research in quantum information processing and are expected
to stimulate a wide range of valuable applications in the field of quantum
sensing.