- Conference date: 6-11 June 2005
- Location: Vaxjo (Sweden)
We have implemented a novel double‐slit “which‐way” experiment which raises interesting questions of interpretation. Coherent laser light is passed through a converging lens and then through a dual pinhole producing two beams crossing over at the focal point of the lens, and fully separating further downstream providing which‐way information. A thin wire is then placed at a minimum of the interference pattern formed at the cross‐over region. No significant reduction in the total flux or resolution of the separated beams is found, providing evidence for coexistence of perfect interference and which‐way information in the same experiment, contrary to the common readings of Bohr’s principle of complementarity. This result further supports the conclusions of the original experiment by the author in which an imaging lens was employed to obtain which‐way information. Finally, a short discussion of the novel nonperturbative measurement technique for ensemble properties is offered.
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