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Towards Einstein-Podolsky-Rosen quantum channel multiplexing

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons40457

Hage,  Boris
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons1446

Samblowski,  Aiko
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons40490

Schnabel,  Roman
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

Externe Ressourcen
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Volltexte (frei zugänglich)

0710.3086
(Preprint), 331KB

PRA81_062301.pdf
(beliebiger Volltext), 308KB

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Zitation

Hage, B., Samblowski, A., & Schnabel, R. (2010). Towards Einstein-Podolsky-Rosen quantum channel multiplexing. Physical Review. A, 81: 062301. doi:10.1103/PhysRevA.81.062301.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0012-BC88-5
Zusammenfassung
A single broadband squeezed field constitutes a quantum communication resource that is sufficient for the realization of a large number N of quantum channels based on distributed Einstein-Podolsky-Rosen (EPR) entangled states. Each channel can serve as a resource for, e.g. independent quantum key distribution or teleportation protocols. N-fold channel multiplexing can be realized by accessing 2N squeezed modes at different Fourier frequencies. We report on the experimental implementation of the N=1 case through the interference of two squeezed states, extracted from a single broadband squeezed field, and demonstrate all techniques required for multiplexing (N>1). Quantum channel frequency multiplexing can be used to optimize the exploitation of a broadband squeezed field in a quantum information task. For instance, it is useful if the bandwidth of the squeezed field is larger than the bandwidth of the homodyne detectors. This is currently a typical situation in many experiments with squeezed and two-mode squeezed entangled light.