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Proceedings Paper

Quantum erasing of biphoton visibility: the complementarity between entanglement and single-partite properties
Author(s): Matthias Jakob
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Paper Abstract

A quantum eraser is proposed that operates in a domain that does not have any classical counterpart. This quantum eraser utilizes the complementary aspect between entanglement and single-partite properties of composite quantum systems. Consequently, in contrast to the duality of visibility and which-path information which establish features of single quantum systems, here, properties of composite quantum systems are considered. In composite quantum systems entanglement might emerge which is of genuine quantum origin. This nonclassical correlation mutually exclude the single-partite properties of the subsystems of the composite quantum system. The single-partite properties can be describes by wave- and particle properties, i.e. the standard wave-particle duality. Remarkably, entanglement can be considered as a resource for observables that do not exist in classical physics. In a bipartite photon system, this observable is the two-particle visibility which describes the phase relations that are shared between both photons of the composite system. The complementary aspect between two-particle visibility and single-partite properties of the subsystems prevents us from the observation of single-partite properties in an entangled biphoton system. The quantum eraser erases the two-partite visibility and retrieves single-partite properties in form of single-particle visibility for both of the two photons. Thus, both observables contain phase information giving rise to interference effects. Here, complementarity is explicitly enforced by entanglement in a quantitative manner.

Paper Details

Date Published: 4 August 2005
PDF: 9 pages
Proc. SPIE 5866, The Nature of Light: What Is a Photon?, (4 August 2005); doi: 10.1117/12.621028
Show Author Affiliations
Matthias Jakob, ARC Seibersdorf research GmbH (Austria)

Published in SPIE Proceedings Vol. 5866:
The Nature of Light: What Is a Photon?
Chandrasekhar Roychoudhuri; Katherine Creath, Editor(s)

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