Physics

Self-testing quantum systems of arbitrary local dimension with minimal number of measurements

S. Sarkar, D. Saha, et al.

Discover a groundbreaking self-testing protocol for maximally entangled states that requires minimal measurements to ensure quantum state certification. Conducted by Shubhayan Sarkar, Debashis Saha, Jędrzej Kaniewski, and Remigiusz Augusiak, this research has unveiled a method to generate perfect randomness using just a single random bit. Don't miss out on these exciting advancements in quantum mechanics!

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Abstract

This paper presents a self-testing protocol for maximally entangled states of arbitrary local dimension using a minimal number of measurements (two per subsystem). The protocol leverages the violation of a single *d*-outcome Bell inequality to certify the quantum state and measurements without knowing the device's internal workings. This self-testing result enables unbounded randomness expansion, generating log₂*d* perfect random bits using only one random bit to encode measurement choices.

Publisher

npj Quantum Information

Published On

Oct 14, 2021

Authors

Shubhayan Sarkar, Debashis Saha, Jędrzej Kaniewski, Remigiusz Augusiak

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