Sylvain Fasel et al 2006 New J. Phys. 8 13 doi:10.1088/1367-2630/8/1/013
Quantum superposition and entanglement of mesoscopic plasmons
Sylvain Fasel1, Matthäus Halder, Nicolas Gisin and Hugo Zbinden
Show affiliationsQuantum 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.
- PACS
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03.67.Mn Entanglement measures, witnesses, and other characterizations
42.50.Dv Quantum state engineering and measurements
- Subjects
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Surfaces, interfaces and thin films
- Dates
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Issue 1 (January 2006)
Received 7 December 2005
Published 30 January 2006
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Quantum superposition and entanglement of mesoscopic plasmons
Sylvain Fasel et al 2006 New J. Phys. 8 13
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