One of the first applications of modern quantum mechanics is key distribution, to allow secret messages to be sent using one-time pads. The one-time pad is known to be the best solution to send secret messages. But sharing the one-time pad between two legitimate users is not easy when they are far apart. The main purpose of quantum communications is to provide a scheme to share a string of random numbers using the superposition principle and the theory of measurements in quantum mechanics.

Current research at QuEST Imperial includes the development of quantum cryptography protocols and random number generation supported by the development of light sources. In order to commercialise quantum cryptography, one of the most important issues will be system integration and standardisation. Imperial has many experts with considerable experience on the subject of system integration and standardisation. 

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Post-quantum Cryptography

Our group works in quantum key distribution (QKD), quantum information theory, and the interaction between lattice cryptography and quantum computing.

Ling Group

Random Number Generators

We are working to generate and certify quantum random numbers quickly and efficiently using light in photonic integrated circuits.

Kolthammer Group

Quantum Light Sources

Probing the interaction between light and matter at the single photon level.

Learn more about our Research Groups working on Quantum Light Sources

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Ultrafast quantum optics and optical metrology

Our research aims to explore the quantum optical frontier by the generation, application, and detection of quantum states of light and matter.

Walmsley Group

Communications Systems and Wireless Communication Standards

 We conduct fundamental and applied research in the area of communication theory and signal processing for wireless systems, networks and standards. We are working on extending our research to quantum communications, and so apply our experience in conventional communication standards to their quantum counterparts.

Clerckx Group

Quantum Communication Theory

We take a mathematical approach to answer the practical questions in quantum cryptography (in particular, continuous-variable QKD). We consider questions around the efficiency of information transfer using quantum technology, or the susceptibility of quantum cryptographic systems to hacking. 

Berta Group