Experimental certification of contextuality, coherence and dimension in a programmable universal photonic processor
arXiv:2311.03266 · doi:10.1126/sciadv.adj4249
Abstract
Quantum superposition of high-dimensional states enables both computational speed-up and security in cryptographic protocols. However, the exponential complexity of tomographic processes makes certification of these properties a challenging task. In this work, we experimentally certify coherence witnesses tailored for quantum systems of increasing dimension, using pairwise overlap measurements enabled by a six-mode universal photonic processor fabricated with a femtosecond laser writing technology. In particular, we show the effectiveness of the proposed coherence and dimension witnesses for qudits of dimensions up to 5. We also demonstrate advantage in a quantum interrogation task, and show it is fueled by quantum contextuality. Our experimental results testify to the efficiency of this novel approach for the certification of quantum properties in programmable integrated photonic platforms
9 pages, 5 figures + Supplementary Information
References in corpus (12)
- Testing the Hilbert space dimension
- Device-independent tests of classical and quantum dimensions
- Preparation contextuality powers parity-oblivious multiplexing
- Low bend loss waveguides enable compact, efficient 3D photonic chips
- A lower bound on the dimension of a quantum system given measured data
- Dimension witnesses and quantum state discrimination
- Quantum Random Access Codes using Single -level Systems
- Femtosecond laser micromachining for integrated quantum photonics
- Thermal phase shifters for femtosecond laser written photonic integrated circuits
- Experimental certification of contextuality, coherence and dimension in a programmable universal photonic processor
- Characterization of multi-mode linear optical networks
- Witnesses of coherence and dimension from multiphoton indistinguishability tests