SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 51: Precision Measurements
Q 51.2: Vortrag
Donnerstag, 9. März 2023, 14:45–15:00, A320
Measuring Beam Deflections via Weak Value Amplification — •Elina Köster1,2, Carlotta Versmold1,2, Jan Dziewior1,2, Florian Huber1,2, Jasmin DA Meinecke1,2, Lev Vaidman1,2,3, and Harald Weinfurter1,2 — 1Fakultät für Physik, Ludwig-Maximilians-Universität, München — 2Max-Planck-Institut für Quantenoptik, Garching — 3Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel
The technique of weak value amplification was already used to precisely measure small deflections of light. Yet, so far the interaction region was included in the measurement device, when e.g. measuring a tiny deflection of a light beam [1]. Here we introduce an interferometric weak measurement setup able to measure displacements and deflections of a light beam that occur outside of the measuring device. This is achieved by spatially separating the arms of a Sagnac interferometer and inserting a Dove prism in one of them.
Due to the mirroring of one of the arms the center of mass of the resulting interference pattern depends on the initial deflection of the beam. Amplified by the weak value of the system this allows a highly sensitive determination of the deflection or displacement.
[1] Dixon et al, "Ultrasensitive beam deflection measurement via interferometric weak value amplification.", Physical review letters, 102.17 (2009): 173601