Universality of local weak interactions and its application for interferometric alignment

Jan Dziewior; Lukas Knips; Demitry Farfurnik; Katharina Senkalla; Nimrod Benshalom; Jonathan Efroni; Jasmin Meinecke; Shimshon Bar-Ad; Harald Weinfurter; Lev Vaidman

doi:10.1073/pnas.1812970116

Universality of local weak interactions and its application for interferometric alignment

Jan Dziewior, Lukas Knips, Demitry Farfurnik, Katharina Senkalla, Nimrod Benshalom, Jonathan Efroni, Jasmin Meinecke, Shimshon Bar-Ad, Harald Weinfurter, Lev Vaidman^*

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

45 Scopus citations

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 preselected 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.

Original language	English
Pages (from-to)	2881-2890
Number of pages	10
Journal	Proceedings of the National Academy of Sciences of the United States of America
Volume	116
Issue number	8
DOIs	https://doi.org/10.1073/pnas.1812970116
State	Published - 19 Feb 2019

Funding

Funders	Funder number
Myelin Project	WE2541/7-1
Solve ME/CFS Initiative
German-Israeli Foundation for Scientific Research and Development	I-1275-303.14
Israel Science Foundation	1311/14

Keywords

Optics alignment
Quantum experiments
Quantum measurement
Quantum physics
Weak measurements

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10.1073/pnas.1812970116

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Dziewior, J., Knips, L., Farfurnik, D., Senkalla, K., Benshalom, N., Efroni, J., Meinecke, J., Bar-Ad, S., Weinfurter, H., & Vaidman, L. (2019). Universality of local weak interactions and its application for interferometric alignment. Proceedings of the National Academy of Sciences of the United States of America, 116(8), 2881-2890. https://doi.org/10.1073/pnas.1812970116

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Dziewior, J, Knips, L, Farfurnik, D, Senkalla, K, Benshalom, N, Efroni, J, Meinecke, J, Bar-Ad, S, Weinfurter, H & Vaidman, L 2019, 'Universality of local weak interactions and its application for interferometric alignment', Proceedings of the National Academy of Sciences of the United States of America, vol. 116, no. 8, pp. 2881-2890. https://doi.org/10.1073/pnas.1812970116

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AU - Efroni, Jonathan

AU - Meinecke, Jasmin

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Universality of local weak interactions and its application for interferometric alignment

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