Perpetual Light

Light is one of the most powerful tools we have to interrogate Nature and to develop new technologies. However, at its most fundamental level, light is extremely fragile: single photons can be easily lost and their state inevitably erased, often considered a fundamental limit for quantum light. This experiment aims at challenging this idea: quantum states of light that can survive losses are possible. The driving idea is to protect them by encoding quantum information in the quantum correlations between multiple photons and to experimentally demonstrate that light can exist in fundamentally new types of quantum states – loss-tolerant ones. Success in this project would open transformative possibilities for scaling quantum technologies with light, from robust quantum networks to large-scale quantum computers.