Exploring the boundary of quantum correlations with a time-domain optical processor.

ABSTRACT: Contextuality is a hallmark feature of the quantum theory that captures its incompatibility with any noncontextual hidden-variable model. The Greenberger-Horne-Zeilinger (GHZ)-type paradoxes are proofs of contextuality that reveal this incompatibility with deterministic logical arguments. However, the GHZ-type paradox whose events can be included in the fewest contexts and that brings the strongest nonclassicality remains elusive. Here, we derive a GHZ-type paradox with a context-cover number of 3 and show that this number saturates the lower bound posed by quantum theory. We demonstrate the paradox with a time-domain fiber optical platform and recover the quantum prediction in a 37-dimensional setup based on high-speed modulation, convolution, and homodyne detection of time-multiplexed pu

SUBMITTER: Liu ZH 

PROVIDER: S-EPMC11789840 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature