Certifying classes of $d$-outcome measurements with quantum steering
Device-independent certification schemes are based on minimal assumptions about the quantum system under study, which makes the most desirable among certification schemes. However, they are often the most challenging to implement. In order to reduce the implementation cost one can consider semi-devi...
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Zusammenfassung: | Device-independent certification schemes are based on minimal assumptions
about the quantum system under study, which makes the most desirable among
certification schemes. However, they are often the most challenging to
implement. In order to reduce the implementation cost one can consider
semi-device-independent schemes such as those based on quantum steering. Here
we provide a construction of a family of steering inequalities which are
tailored to large classes of $d$-outcomes projective measurements being a
certain linear combination of the Heisenberg-Weyl operators on the untrusted
side and a fixed set of known measurements on the trusted side. We then prove
that the maximal quantum violation of those inequalities can be used for
certification of those measurements and the maximally entangled state of two
qudits. Importantly, in our self-testing proof, we do not assume the shared
state to be pure, nor do we assume the measurements to be projective. We
believe that our construction broadens the scope of semi-device-independent
certification, paving the way for more general but still less costly quantum
certification protocols. |
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DOI: | 10.48550/arxiv.2410.20477 |