Universality of local weak interactions and its application for interferometric alignment

Dziewior, Jan; Knips, Lukas; Farfurnik, Demitry; Senkalla, Katharina; Benshalom, Nimrod; Efroni, Jonathan; Meinecke, Jasmin; Bar-Ad, Shimshon; Weinfurter, Harald und Vaidman, Lev (2019): Universality of local weak interactions and its application for interferometric alignment. In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 116, No. 8: pp. 2881-2890

Abstract

The modification of the effect of interactions of a particle as a function of its preselected and postselected states is analyzed theoretically and experimentally. The universality property of this modification in the case of local interactions of a spatially pre-selected and postselected particle has been found. It allowed us to define an operational approach for the characterization of the presence of a quantum particle in a particular place: the way it modifies the effect of local interactions. The experiment demonstrating this universality property provides an efficient interferometric alignment method, in which the position of the beam on a single detector throughout one phase scan yields all misalignment parameters.

• Item Type: Journal article
• Faculties: Physics
• Subjects: 500 Science > 530 Physics
• ISSN: 0027-8424
• Language: English