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Expert(s) for : Informatique théorique
- Quantum information science
- Theoretical computer science
- Quantum teleportation
- Foundations of quantum mechanics
- Computer privacy
My main research interests concern quantum information science, quantum and classical cryptography, the foundations of quantum mechanics and the protection of privacy. Cryptography is the art and science that makes confidential communication possible. It can also be used to authenticate data and protect its integrity. Furthermore, it can be used to allow several people to collaborate in achieving a variety of distributed tasks securely even if some of the participants might be tempted to cheat.
Quantum information science, which is at the junction of computer science, physics and mathematics, is the thriving field that studies the links between quantum mechanics and information processing. We are witnessing the prospect of transmitting and processing information with unconditionally secure communication and computers powerful beyond imagination: this is the Rise of the Quantum Age, which will come down in History as the signature of the 21st Century. Quantum computers (which we don't yet know how to build) would have the capability for defeating the cryptographic schemes currently used to secure transactions on the Internet. Fortunately, quantum cryptography comes to the rescue and fulfils the age-old dream of cryptographers: it provides provable perfect secrecy even under the nose of an eavesdropper having at her disposal unlimited computing power and technology limited only by the known laws of physics.
I am also one of the inventors of quantum teleportation, which may evoke images of Star Trek but is strictly based on established science. Finally, could it be that computer science can give back to physics by helping us understand the deep mysteries behind quantum mechanics? This is the question I asked in the inaugural issue of Nature Physics. I am currently working on new foundations for a completely local and realistic interpretation of quantum mechanics.