Certifying semi-device-independent security via wave-particle duality experiments

• URL: http://arxiv.org/abs/2507.00679v1
• Date: Tue, 01 Jul 2025 11:23:32 GMT
• Title: Certifying semi-device-independent security via wave-particle duality experiments
• Authors: Chithra Raj, Tushita Prasad, Anubhav Chaturvedi, Lucas Pollyceno, Daniel Spegel-Lexne, Santiago Gómez, Joakim Argillander, Alvaro Alarcón, Guilherme B. Xavier, Marcin Pawłowski, Pedro R. Dieguez,
• Abstract summary: We derive a connection between wave-particle relations and the semi-device-independent security framework.<n>In particular, we express an SDI witness entirely in terms of two complementary interferometric quantities.<n>We perform a proof-of-principle experiment using orbital-angular-momentum encoded quantum states of light.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Wave-particle duality is known to be equivalent to an entropic uncertainty relation based on the min- and max-entropies, which have a clear operational meaning in quantum cryptography. Here, we derive a connection between wave-particle relations and the semi-device-independent (SDI) security framework. In particular, we express an SDI witness entirely in terms of two complementary interferometric quantities: visibility and input distinguishability. Applying a symmetry condition to the interferometric quantities, we identify a scenario in which the classical bound is violated and the security condition is met in wave-particle experiments with a tunable beam splitter. This enables the certification of non-classicality and the positivity of the key rate directly from complementary interferometric quantities. Moreover, we perform a proof-of-principle experiment using orbital-angular-momentum encoded quantum states of light in a tunable interferometer, validating our theoretical predictions. Finally, we analyze an improved bound on the SDI security condition, effectively enlarging the parameter region where secure communication can be certified.

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