Steering-based randomness certification with squeezed states and homodyne measurements

TL;DR

This paper proposes a quantum randomness certification scheme using quantum steering with squeezed states and homodyne measurements, enabling high-security, high-rate randomness generation with practical optical setups.

Contribution

It introduces a one-sided device-independent protocol based on Gaussian states and measurements, demonstrating its feasibility with existing experimental data and potential for gigahertz random bit rates.

Findings

Certifies randomness using existing experimental data.

Achieves high security with simple optical states and measurements.

Potential for gigahertz-rate random bit generation.

Abstract

We present a scheme for quantum randomness certification based on quantum steering. The protocol is one-sided device independent, providing high security, but requires only states and measurements that are simple to realise on quantum optics platforms - entangled squeezed vacuum states and homodyne detection. This ease of implementation is demonstrated by certifying randomness in existing experimental data and implies that giga-hertz random bit rates should be attainable with current technology. Furthermore, the steering-based setting represents the closest to full device independence that can be achieved using purely Gaussian states and measurements.