Quantum Information processing

As scientists pursue the development of quantum computers and similar technologies, they’re finding increasing promise in photonic systems – technologies that utilize light particles, or photons. Photonic systems have a unique edge due to their ability to function at room temperature and withstand disturbances that can disrupt quantum states, known as decoherence. Despite their potential, creating and managing quantum states of light across multiple optical paths is complex. At present, two main types of photonic systems form the backbone of quantum technology: bulk and integrated photonics. However, an emerging alternative known as time-bin encoding offers potential for efficient and flexible control of quantum states. This approach has potential to retain coherence, which is essential in large-scale quantum states prone to decoherence. In our group, we explore new platforms for managing quantum information using ultrafast time-bin encoding, based on rapidly programmable elements that can be connected to create a full quantum circuit within a single beam, thus simplifying the process. We can achieve this control using a mix of static and adjustable modulations in optical fibers. This fiber-based approach is compatible with various quantum sources and cutting-edge detector technologies. The coherence of this platform paves the way for expanding critical quantum technologies, like quantum computing and sensing.