期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 116, 期 8, 页码 2881-2890出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1812970116
关键词
quantum physics; quantum experiments; quantum measurement; weak measurements; optics alignment
资金
- Israel Science Foundation [1311/14]
- German-Israeli Foundation for Scientific Research and Development [I-1275-303.14]
- DFG Beethoven 2 Project [WE2541/7-1]
- German Excellence Initiative Nanosystems Initiative Munich
- international Max-Planck-Research School for Quantum Science and Technology
- international Ph.D. program ExQM from the Elite Network of Bavaria
- Ludwig-Maximilians-Universitat research fellowship
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.
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