Research areas

• Theoretical research in quantum foundations and quantum information science
• Quantum non-locality and Bell inequalities
• Quantum causality
• Generalized probabilistic theories
• Uncertainty principles
• Quantum cryptography
• Applications in quantum optics

Quantum Fondation group

** Causalité quantique :

Articles non-techniques :

• "Causality gets entangled"
• "Quantum process demonstrates superposition of ordered events"
• "Quantum Physicists Superimpose Past and Future Events"

Publications :

• M. Araújo et al., Witnessing causal nonseparability, New Journal of Physics 17, 102001 (2015)
• C. Branciard et al., The simplest causal inequalities and their violation, New Journal of Physics 18, 013008 (2016)
• C. Branciard, Witnesses of causal nonseparability: an introduction and a few case studies, Scientific Reports 6, 26018 (2016)
• A. A. Abbott et al., Multipartite causal correlations: Polytopes and inequalities, Physical Review A 94, 032131 (2016)

** Etude du statut de la fonction d’onde :

Press releases / articles non-techniques :

• “Quantum Reality Check”
• “Sculpting quantum reality”
• "Quantum physics: What is really real?"
• "Wave function gets real in quantum experiment"
• “The Reality of Quantum Weirdness”
• “They've finally solved it: Schrödinger's cat is both ALIVE AND DEAD”
• “New Measurements Show that the Unrealest Part of Quantum Physics Is Very Real”
• "Schrödinger’s cat gets a reality check"

Publications :

• C. Branciard, How ?-Epistemic Models Fail at Explaining the Indistinguishability of Quantum States, Physical Review Letters 113, 020409 (2014)
• M. Ringbauer et al., Measurements on the reality of the wave function, Nature Physics 11, 249 (2015)

    ** Principe d’incertitude :

Press releases / articles non-techniques :

• "More certain about Heisenberg's uncertainty principle”
• "Uncertainty revisited: Novel tradeoffs in quantum measurement"
• “Research team challenges the limits of famous quantum principle”
• “Incertitude quantique — La fin du principe d’Heisenberg ?”. Dossier dans La Recherche n° 492, octobre 2014

Publications :

• C. Branciard, Error-tradeoff and error-disturbance relations for incompatible quantum measurements, Proceedings of the National Academy of Sciences 110, 6742 (2013)
• M. Ringbauer et al., Experimental Joint Quantum Measurements with Minimum Uncertainty, Physical Review Letters 112, 020401 (2014)
• C. Branciard, Deriving tight error-trade-off relations for approximate joint measurements of incompatible quantum observables, Physical Review A 89, 022124 (2014)
• A. A. Abbott et al., Tight State-Independent Uncertainty Relations for Qubits, Mathematics 4(1), 8 (2016)
• A. A. Abbott and C. Branciard, Noise and disturbance of qubit measurements: An information-theoretic characterization, Physical Review A 94, 062110 (2016)