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Quantum superposition and entanglement of mesoscopic plasmons

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Published in New Journal of Physics. 2006, vol. 8, p. 13-13
Abstract Quantum superpositions and entanglement are at the heart of the quantum information science. There have been only a few investigations of these phenomena at the mesoscopic level, despite the fact that these systems are promising for quantum state storage and processing. Here, we present two novel experiments with surface plasmons propagating on cm-long metallic stripe waveguides. We demonstrate that two plasmons can be entangled at remote places. In addition, we create a single plasmon in a temporal superposition state: it exists in a superposition of two widely separated moments. These quantum states, created using photons at telecom wavelength, are collectively held by a mesoscopic number of electrons coding a single-quantum bit of information; they are shown to be very robust against decoherence.
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FASEL, Sylvain et al. Quantum superposition and entanglement of mesoscopic plasmons. In: New Journal of Physics, 2006, vol. 8, p. 13-13. https://archive-ouverte.unige.ch/unige:36775

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Deposited on : 2014-05-20

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