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Ramsey Interference with Single Photons.
Clemmen, Stéphane; Farsi, Alessandro; Ramelow, Sven; Gaeta, Alexander L.
  • Clemmen S; School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA.
  • Farsi A; School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA.
  • Ramelow S; Faculty of Physics, Humboldt-University Berlin, Berlin 12489, Germany.
  • Gaeta AL; School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA.
Phys Rev Lett ; 117(22): 223601, 2016 Nov 25.
Article en En | MEDLINE | ID: mdl-27925713
ABSTRACT
Interferometry using discrete energy levels of nuclear, atomic, or molecular systems is the foundation for a wide range of physical phenomena and enables powerful techniques such as nuclear magnetic resonance, electron spin resonance, Ramsey-based spectroscopy, and laser or maser technology. It also plays a unique role in quantum information processing as qubits may be implemented as energy superposition states of simple quantum systems. Here, we demonstrate quantum interference involving energy states of single quanta of light. In full analogy to the energy levels of atoms or nuclear spins, we implement a Ramsey interferometer with single photons. We experimentally generate energy superposition states of a single photon and manipulate them with unitary transformations to realize arbitrary projective measurements. Our approach opens the path for frequency-encoded photonic qubits in quantum information processing and quantum communication.
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Banco de datos: MEDLINE Idioma: En Año: 2016 Tipo del documento: Article
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Banco de datos: MEDLINE Idioma: En Año: 2016 Tipo del documento: Article