# Experimental demonstration of fully contextual quantum correlations on an NMR quantum information processor

## TL;DR

This paper experimentally demonstrates fully contextual quantum correlations using an NMR quantum processor by testing inequalities that reveal quantum contextuality in high-dimensional Hilbert spaces.

## Contribution

It presents the first experimental testing of fully contextual quantum inequalities on an NMR quantum information processor with reformulated projectors in Pauli operators.

## Key findings

- Successfully tested contextuality inequalities on NMR system
- Reformulated inequalities in terms of Pauli operators for NMR compatibility
- Analyzed the effect of state rotations on inequality violations

## Abstract

The existence of contextuality in quantum mechanics is a fundamental departure from the classical description of the world. Currently, the quest to identify scenarios which cannot be more contextual than quantum theory is at the forefront of research in quantum contextuality. In this work, we experimentally test two inequalities, which are capable of revealing fully contextual quantum correlations, on a Hilbert space of dimension 8 and 4 respectively, on an NMR quantum information processor. The projectors associated with the contextuality inequalities are first reformulated in terms of Pauli operators, which can be determined in an NMR experiment. We also analyze the behavior of each inequality under rotation of the underlying quantum state, which unitarily transforms it to another pure state.