Phys. Rev. A 65, 033818 (2002) [6 pages]Double-slit quantum eraser |
PRL Celebrates 50 Years
This Week's Milestone Letters are from 1974: |
S. P. Walborn1, M. O. Terra Cunha1,2, S. Pádua1, and C. H. Monken1
1Departamento de Física, Universidade Federal de Minas Gerais, Caixa Postal 702, Belo Horizonte, MG 30123-970, Brazil
2Departamento de Matemática, Universidade Federal de Minas Gerais, Caixa Postal 702, Belo Horizonte, MG 30123-970, Brazil
Received 17 November 2000; published 20 February 2002
We report a quantum eraser experiment which actually uses a Young double slit to create interference. The experiment can be considered an optical analogy of an experiment proposed by Scully, Englert, and Walther [Nature (London) 351, 111 (1991)]. One photon of an entangled pair is incident on a Young double slit of appropriate dimensions to create an interference pattern in a distant detection region. Quarter-wave plates, oriented so that their fast axes are orthogonal, are placed in front of each slit to serve as which-path markers. The quarter-wave plates mark the polarization of the interfering photon and thus destroy the interference pattern. To recover interference, we measure the polarization of the other entangled photon. In addition, we perform the experiment under “delayed erasure” circumstances.
©2002 The American Physical Society
URL: http://link.aps.org/abstract/PRA/v65/e033818
DOI: 10.1103/PhysRevA.65.033818
PACS: 42.50.Dv, 03.65.Ta, 42.50.Ar, 42.25.Kb
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