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Résumé |
Quantum technologies draw their power from a specific kind of nonclassicality
often called 'magic'—patterns in a quantum state that can’t be explained by
ordinary (classical) probability theory. Unlike entanglement alone, magic is a
marker of when a quantum system becomes hard to simulate and when truly quantum
operations appear. In this talk I will provide a self-contained introduction to
that topic that does not require background knowledge in Quantum Information.
Then, after introducing a standard measure of magic in finite-dimensional
quantum systems called the Stabilizer Renyi Entropy (SRE), I will provide a
first-principle 'derivation' of this quantity. Our approach allows us then to
naturally propose a measure of magic for hybrid boson-fermion systems. We also
show how the notion of magic can be relevant to the study of concrete systems in
physics and quantum chemistry. |
