# Higher amounts of loophole-free Bell violation using a heralded entangled source

Article · Shuai Zhao, Wen-Fei Cao, Yi-Zheng Zhen, Changchen Chen, Li Li, Nai-Le Liu, Feihu Xu, Kai Chen

- Archive id: doi:10.1088/1367-2630/ab4538
- Published: 2019-09-18
- Venue: New Journal of Physics
- DOI: https://doi.org/10.1088/1367-2630/ab4538
- Citations: 6
- Source URL: https://doi.org/10.1088/1367-2630/ab4538
- PDF: https://iopscience.iop.org/article/10.1088/1367-2630/ab4538/pdf
- Provenance: openalex

## Abstract

Abstract Loophole-free Bell non-locality test plays a central role in device-independent quantum information processing tasks, such as device-independent quantum random number generation (QRNG) and quantum key distribution (QKD). Inspired by the scheme of heralded spontaneous parametric down conversion (SPDC) source proposed in (Śliwa C and Banaszek K 2003 Phys. Rev. A 67 030101), we present a loophole-free Bell test scheme that employs the heralded type of entangled photon pairs. Our proposal enables a much higher degree of Bell violation with realistic photonic devices over the one using the conventional SPDC source, thus allowing the implementation of device-independent QRNG and QKD with significant advantages. We anticipate that the scheme will enable variously subtle applications in device-independent quantum information processing tasks.

_Abstract reproduced under CC-BY (publisher license, via OpenAlex)._

Topics: [Quantum Foundations](https://space-kitty.com/topics/quantum-foundations)

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