Multipartite Entanglement Generation and Contextuality Tests Using Non-Destructive Three-Qubit Parity Measurements
May 27th, 2019 SUZANNE VAN DAM Delft University

Thanks to their unique quantum properties non-destructive parity measurements are at the heart of quantum information protocols, for example as stabilizer measurements in quantum error correction or to generate entangled states. In addition, their strikingly non-classical behaviour features in tests of the foundations of quantum mechanics. We here demonstrate the first repeated multiqubit parity measurements, implemented on nuclear spins surrounding a nitrogen-vacancy centre in diamond. Through the sequential application of three such parity measurements, we demonstrate the generation of genuine multipartite entangled states out of the maximally mixed state. Furthermore, we implement a first single-shot version of the GHZ experiment that can generate a quantum versus classical contradiction in each run, and we test a state-independent non-contextuality inequality in eight dimensions.

Seminar, May 27, 2019, 15:00. ICFO’s Seminar Room

Hosted by Prof. Hugues de Riermatten