Transition from pure-state to mixed-state entanglement by random scattering

Transition from pure-state to mixed-state entanglement by random scattering

We calculate the effect of polarization-dependent scattering by disorder on the degree of polarization entanglement of two beams of radiation. Multimode detection converts an initially pure state into a mixed state with respect to the polarization degrees of freedom. The degree of entanglement decay...

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Veröffentlicht in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2004-09, Vol.70 (3), Article 032325
Hauptverfasser: van Velsen, J. L., Beenakker, C. W. J.
Format: Artikel
Sprache:eng
Schlagworte:
ATOMIC AND MOLECULAR PHYSICS
CORRELATIONS
DECAY
DEGREES OF FREEDOM
ENERGY LEVELS
MIXED STATE
PHOTONS
POLARIZATION
QUANTUM MECHANICS
RANDOMNESS
SCATTERING
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Beschreibung
Zusammenfassung:We calculate the effect of polarization-dependent scattering by disorder on the degree of polarization entanglement of two beams of radiation. Multimode detection converts an initially pure state into a mixed state with respect to the polarization degrees of freedom. The degree of entanglement decays exponentially with the number of detected modes if the scattering mixes the polarization directions and algebraically if it does not.
ISSN:1050-2947
1094-1622
DOI:10.1103/PhysRevA.70.032325