PIRSA:26020034

Detecting Nonclassicality in Quantum Networks via a Novel Intervention Framework

Zamora, S. (2026). Detecting Nonclassicality in Quantum Networks via a Novel Intervention Framework. Perimeter Institute. https://pirsa.org/26020034

Zamora, Santiago. Detecting Nonclassicality in Quantum Networks via a Novel Intervention Framework. Perimeter Institute, Feb. 02, 2026, https://pirsa.org/26020034 

          @misc{ pirsa_PIRSA:26020034,
            doi = {10.48660/26020034},
            url = {https://pirsa.org/26020034},
            author = {Zamora, Santiago},
            keywords = {Quantum Foundations},
            language = {en},
            title = {Detecting Nonclassicality in Quantum Networks via a Novel Intervention Framework},
            publisher = {Perimeter Institute},
            year = {2026},
            month = {feb},
            note = {PIRSA:26020034 see, \url{https://pirsa.org}}
          }

Santiago Zamora International Institute of Physics, Federal University of Rio Grande do Norte (IIP-UFRN)

Talk numberPIRSA:26020034
DOI10.48660/26020034
Collection
Talk Type Scientific Series
Subject

Abstract

Causal interventions have emerged as an effective tool for certifying nonclassicality, offering improved detection efficiency and robustness to noise compared to purely observational approaches. However, standard node interventions (Pearl interventions) become uninformative in space-like separated networks such as the Triangle Network.
 
To address this limitation, we introduce Latent Splitting, a framework that generalizes the notion of intervention from observable variables to the latent quantum sources themselves. Latent Splitting subsumes standard interventions as a special case and provides an effective causal probe for the Triangle Network. Using this framework, we derive robust witnesses for the RGB4 family and establish nonclassicality in the minimal binary-outcome triangle scenario, a regime previously thought to admit a classical model.