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Anomalous Amplification of a Homodyne signal via Almost-Balanced Weak Values by Liu, Wei-Tao; Martínez-Rincón, Julián; Viza, Gerardo I.; Howell, John C. is a scholarly article available to read on EtoBox.

What is Anomalous Amplification of a Homodyne signal via Almost-Balanced Weak Values about?

The technique of almost-balanced weak values amplification (ABWV) was recently proposed [Phys. Rev. Lett. 116: 100803 (2016)]. We demonstrate this technique using a modified Sagnac interferometer, where the counter-propagating beams are spatially separated. The separation between the two beams provides additional amplification, with respect to using colinear beams in a Sagnac interferometer. As a demonstration of the technique, we perform measurements of the angular velocity in one of the mirrors of the interferometer. Within the same setup, the weak-value amplification technique is also performed for comparison. Much higher amplification factors can be obtained using the almost-balanced weak values technique, with the best one achieved in our experiments being as high as $1.2\times10^7$. In addition, the amplification factor monotonically increases with decreasing post-selection phase for the ABWV case in our experiments, which is not the case for weak-value amplification at small post-selection phases.

Author

Liu, Wei-Tao; Martínez-Rincón, Julián; Viza, Gerardo I.; Howell, John C.

Published

2016

Language

EN