Research

Higher-Order Quantum Interference

Standard quantum mechanics predicts that Born’s rule limits interference to pairwise (second-order) terms — higher-order terms vanish exactly. We test this prediction experimentally using controlled multi-slit configurations with single-photon detection and coincidence counting.

The goal is to bound any deviation from Born’s rule and constrain possible extensions of quantum theory, providing a direct experimental test of the Sorkin parameter.

Quantum OpticsSingle-Photon DetectionFoundations of QM

PPKTP SPDC Source

We generate entangled photon pairs via spontaneous parametric down-conversion (SPDC) in a periodically-poled KTP crystal, pumped with a 405 nm Topmode laser. The source feeds our multi-slit interference setup for coincidence-resolved measurements.

SPDCPPKTPEntangled Photons

Generalized Probabilistic Theories (GPTs)

We use GPT rank methods to statistically analyse multi-slit data, providing a model-independent framework for testing quantum theory against broader classes of physical theories.

GPTsStatistical AnalysisTheory Testing