Alladi Ramakrishnan Hall

Randomness-free Tests of Non-classicality

Some Sankar Bhattacharya

ICTQT, University of Gdansk, Poland

Tests of the quantum nature of physical systems are complicated by the requirement of randomness in the inputs to such tests. For example, the true randomness that quantum systems are known to exhibit can only be certified in a device-independent manner using Bell's theorem, which needs true randomness (however small) in the inputs. Recently a way to test non-classical correlations and measurements without the need for true randomness, the only test of this kind, has been theoretically proposed and experimentally tested. Our method certifying both non-classical correlations and generalized measurements is semi-device-independent, requiring only knowledge of the dimensionality of the subsystem. We will discuss the prospects and difficulties of applying this technique to higher dimensional systems.