Nicolas J. Cerf
|Alma mater||Université Libre de Bruxelles|
Negative quantum entropy|
Quantum information with continuous variables
Caltech President's Fund award (1997)|
Alcatel-Bell Science Prize (1999) Wernaers Prize of the FNRS (2000)
Marie Curie Excellence Award (2006)
Paris-Sud 11 University|
California Institute of Technology
Université Libre de Bruxelles
Nicolas Jean Cerf (born 1965) is a Belgian physicist. He is professor of quantum mechanics and information theory at the Université Libre de Bruxelles and a member of the Royal Academies for Science and the Arts of Belgium. He received his Ph.D. at the Université Libre de Bruxelles in 1993, and was a researcher at the Université de Paris 11 and the California Institute of Technology. He is the director of the Center for Quantum Information and Computation at the Université Libre de Bruxelles.
Together with Christoph Adami, he defined the quantum version of conditional and mutual entropies, which are basic notions of Shannon's information theory, and discovered that quantum information can be negative (a pair of entangled particles was coined a qubit-antiqubit pair). This has led to important results in quantum information sciences, for example quantum state merging. He is best known today for his work on quantum information with continuous variables. He found a Gaussian quantum cloning transformation  (see no-cloning theorem) and invented a Gaussian quantum key distribution protocol, which is the continuous counterpart of the so-called BB84 protocol, making a link with Shannon's theory of Gaussian channels. This has led to the first experimental demonstration of continuous-variable quantum key distribution with optical coherent states and homodyne detection.
He received the Caltech President’s Fund Award in 1997, and the Marie Curie Excellence Award in 2006.
- Cerf, Nicolas; Leuchs, G.; E. S. Polzik (2007). Quantum information with continuous variables of atoms and light. World Scientific.
- "Negative entropy and information in quantum mechanics". Physical Review Letters. 1997.
- "Quantum extension of conditional probability". Physical Review. 1999.
- "Cloning of continuous quantum variables". Physical Review Letters. 2000.
- "Quantum distribution of Gaussian keys using squeezed states". Physical Review A. 2001.
- "Quantum key distribution using gaussian-modulated coherent states". 421 (6920). Nature Magazine. 2003. doi:10.1038/nature01289.
- "2006 Marie Curie Excellence Awards recognise five outstanding researchers". European Commission. 2006. Retrieved 2011-12-08.