Towards experimental demonstration of quantum position verification using true single photons
Kirsten Kanneworff, Mio Poortvliet, Dirk Bouwmeester, Rene Allerstorfer, Philip Verduyn Lunel, Florian Speelman, Harry Buhrman, Petr Steindl, Wolfgang Löffler
Published: 2025/2/6
Abstract
The geographical position can be a good credential for authentication of a party, this is the basis of position-based cryptography - but classically this cannot be done securely without physical exchange of a private key. However, recently, it has been shown that by combining quantum mechanics with the speed of light limit of special relativity, this might be possible: quantum position verification. Here we demonstrate experimentally a protocol that uses two-photon Hong-Ou-Mandel interference at a beamsplitter, which, in combination with two additional beam splitters and 4 detectors is rendering the protocol resilient to loss. With this we are able to show first results towards an experimental demonstration of quantum position verification.