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Complementarity and quantum erasure with entangled-photon states
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.ORCID iD: 0000-0002-2082-9583
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2000 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 62, no 3, art. no.-32106 p.Article in journal (Refereed) Published
Abstract [en]

A quantum-erasure experiment was performed on superposition states of two photons in either of two spatiotemporal modes. Symmetrical tapping of energy from the two-mode state creates a four-mode entangled state. A direct measurement of one photon in two of the modes reveals the path of the second one, thereby eliminating the possibility of observing interference between the two remaining modes. It is shown that a unitary rotation of one of the two-mode states erases the path information; as a consequence, the visibility of the other two-mode state can be resurrected.

Place, publisher, year, edition, pages
2000. Vol. 62, no 3, art. no.-32106 p.
Keyword [en]
parametric down-conversion, which-way information, 2-photon interference, fringe visibility, 2 photons, eraser, uncertainty, coherence, interferometer, phase
URN: urn:nbn:se:kth:diva-20033ISI: 000089255400014OAI: diva2:338726
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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Björk, Gunnar
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Microelectronics and Information Technology, IMIT
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