Multiparticle state tomography: Hidden differences

R. B.A. Adamson, L. K. Shalm, M. W. Mitchell, A. M. Steinberg

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

43 Citas (Scopus)

Resumen

We address the problem of completely characterizing multiparticle states including loss of information to unobserved degrees of freedom. In systems where nonclassical interference plays a role, such as linear-optics quantum gates, such information can degrade interference in two ways, by decoherence and by distinguishing the particles. Distinguishing information, often the limiting factor for quantum optical devices, is not correctly described by previous state-reconstruction techniques, which account only for decoherence. We extend these techniques and find that a single modified density matrix can completely describe partially coherent, partially distinguishable states. We use this observation to experimentally characterize two-photon polarization states in single-mode optical fiber.

Idioma originalEnglish
Número de artículo043601
PublicaciónPhysical Review Letters
Volumen98
N.º4
DOI
EstadoPublished - 2007
Publicado de forma externa

ASJC Scopus Subject Areas

  • General Physics and Astronomy

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