Fast single-photon detectors and real-time key distillation enable high secret-key-rate quantum key distribution systems
Mar 13, 2023, 1:31 PM
How can we ensure our data is secure when carrying out day-to-day transactions? Quantum physics has the answer! By using photons, a secret key can be securely transmitted between two users, so allowing them to privately communicate. But up to now, the efficiency with which the photons were detected has restricted more widespread use of this technology. Our team has broken the record for secret key rate transmission by a factor of 6! The results are out now in Nature Photonics.
Fine-Tuning of Entangled Two-Photon Absorption by Controlling the One-Photon Absorption Properties of the Chromophore
Mar 10, 2023, 9:50 AM
More great news from our ETPA research! A new paper by the group gives a theoretical analysis of ETPA to better understand how its cross-section in chromophores (the part of a molecule responsible for its colour) varies, depending on the coherence time of the incident entangled photon-pair and the excited states of the chromophore. The team found a periodic dependence on the coherence time, with the predictions confirmed by molecular quantum mechanical calculations for several chromophores.