Experimental observation of quantum chaos in a beam of light
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2012
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The manner in which unpredictable chaotic dynamics manifests itself in quantum mechanics
is a key question in the field of quantum chaos. Indeed, very distinct quantum features can
appear due to underlying classical nonlinear dynamics. Here we observe signatures of
quantum nonlinear dynamics through the direct measurement of the time-evolved Wigner
function of the quantum-kicked harmonic oscillator, implemented in the spatial degrees
of freedom of light. Our setup is decoherence-free and we can continuously tune the
semiclassical and chaos parameters, so as to explore the transition from regular to essentially
chaotic dynamics. Owing to its robustness and versatility, our scheme can be used to
experimentally investigate a variety of nonlinear quantum phenomena. As an example, we
couple this system to a quantum bit and experimentally investigate the decoherence
produced by regular or chaotic dynamics.
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LEMOS,Gabriela B.; GOMES, Rafael M.; WALBORN, Stephen P.; RIBEIRO, Paulo H. Souto; TOSCANO, Fabricio. Experimental observation of quantum chaos in a beam of light. Nature communications, London, v. 3, e1211, 2012. DOI: 10.1038/ncomms2214. Disponível em: https://www.nature.com/articles/ncomms2214. Acesso em: 10 maio 2023.