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Comprehensive experimental test of quantum erasure
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.ORCID iD: 0000-0002-2082-9583
2002 (English)In: European Physical Journal D: Atomic, Molecular and Optical Physics, ISSN 1434-6060, E-ISSN 1434-6079, Vol. 18, no 2, 251-258 p.Article in journal (Refereed) Published
Abstract [en]

In an interferometer, path information and interference visibility are incompatible quantities. Complete determination of the path will exclude any possibility of interference, rendering zero visibility. However, it is, under certain conditions, possible to trade the path. information for improved (conditioned) visibility. This procedure is called quantum erasure. We have performed such experiments with polarization-entangled photon pairs. Using a partial polarizer, we could vary the degree of entanglement between the object and the probe. We could also vary the interferometer splitting ratio and thereby vary the a priori path predictability. This allowed us to test quantum erasure under a number of different experimental conditions. All experiments were in good agreement with theory.

Place, publisher, year, edition, pages
2002. Vol. 18, no 2, 251-258 p.
Keyword [en]
which-way information, 2-photon interference, uncertainty principle, fringe visibility, delayed choice, complementarity, eraser, coherence, phase, indistinguishability
URN: urn:nbn:se:kth:diva-21355ISI: 000174180500015OAI: diva2:340053
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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Björk, Gunnar
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