Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Optics Express

Super amplification enabled by orbital angular momentum in weak measurement

Shiwei Xie, Junfan Zhu, An Wang, Yue Wang, Yongping Huang, Zhiyou Zhang

Published Mar 7, 2024• 3 citations
Publisher

Abstract

Weak measurement, which can amplify a weak signal, has shown great significance in precision measurements. The amplification is usually realized through the weak value and the propagation factor. We show that the orbital angular momentum (OAM) can provide another dimension for amplification that is linearly proportional to the OAM number. We employ OAM to measure the spin Hall effect of light and demonstrate that the OAM-enabled amplification is compatible with the weak value amplification and the propagation amplification. This work is probable to promote the application of OAM in precision measurements.

DOI
10.1364/oe.517987

Related papers

Amplification of Angular Rotations Using Weak Measurements

Omar S. Magaña‐Loaiza, Mohammad Mirhosseini, Brandon Rodenburg +1 more

We present a weak measurement protocol that permits a sensitive estimation of angular rotations based on the concept of weak-value amplification. The shift in the state of a pointer, in both angular position and the conjugate orbital angular momentum bases, is used to estimate angular rotations. This is done by an amplification of both the real and imaginary parts of the weak-value of a polarization operator that has been coupled to the pointer, which is a spatial mode, via a spin-orbit coupling. Our experiment demonstrates the first realization of weak-value amplification in the azimuthal degree of freedom. We have achieved effective amplification factors as large as 100, providing a sensitivity that is on par with more complicated methods that employ quantum states of light or extremely large values of orbital angular momentum.

arXiv:1312.2981•Physical Review Letters•May 21, 2014•223 citations

Investigation on orbital angular momentum hall effect and spin orbit interaction of light

Arindam Nandi

The basics of weak measurement and its various applications are discussed here. The optical analogue of weak measurement. which was predicted by E C G Sudarshan was also demonstrated with the experimental results. The optical activity of chiral molecules is also calculated with the help of weak measurement. We also demonstrate simultaneous weak value amplification of both the angular GH and the IF shifts in partial reflection of a fundamental Gaussian beam at planar dielectric interfaces. We employ pre and post selection schemes with appropriate linear polarization basis states for simultaneous weak measurements and amplification of both of these shifts.We also studied these GH and IF shifts for higher order beams (for example Vortex beams)and how its get coupled. Geometric Hall effect of light is also studied with the help of weak measurement and we get the expected nature according to the theory.

•Apr 1, 2016•0 citations

Precisely measuring the orbital angular momentum of beams via weak measurement

Jiangdong Qiu, Changliang Ren, Zhiyou Zhang

We proposed and analyzed a scheme of precisely measuring orbital angular momentum (OAM) of the vortex beams with the help of weak measurement process. The orbital angular momentum information $l$ of the unknown OAM state can be obtained by its spatial displacements. The valid condition of precisely measuring orbital angular momentum was completely discussed. Interestingly, it is shown that the measurement by using the two-dimensional spatial displacements jointly is very useful for precisely measuring the OAM state with a large orbital angular momentum $l$. The signal-to-noise ratio of the measurement can be enhanced by increasing the weak-coupling $\ensuremath{\gamma}$ linearly as the valid condition is still satisfied. For fixed $\ensuremath{\gamma}$, the maximal signal-to-noise ratio for each weak value increases with the decrease of the weak value.

Physical Review A•Jun 23, 2016•20 citations

Topologically protected measurement of orbital angular momentum of light

Junfan Zhu, Wang, An, Yurong Liu +2 more

We develop a weak measurement scheme for measuring orbital angular momentum (OAM) of light based on the global topology in wave function. We introduce the spin-orbit coupling to transform the measurement of OAM to the pre- and postselected measurement of polarization. The OAM number can be precisely and promptly recognized using single-shot detection without the need for spatial resolution. More significantly, the measurement results exhibit topological robustness under random phase perturbations. This scheme has the potential to be applied as a paradigm in the OAM-based optical computing, metrology and communication.

arXiv:2410.00331•Oct 1, 2024•0 citations

Amplification of Angular Rotations using Weak Measurements

Omar S. Magaña‐Loaiza, Mohammad Mirhosseini, Brandon Rodenburg +1 more

We experimentally demonstrate the first weak-value amplification of the azimuthal degree of freedom. We estimate rotations using shifts in angular position and orbital angular momentum, via spin-orbit coupling and an applied geometric phase.

Frontiers in Optics•Jan 1, 2014•16 citations

Detection of orbital angular momentum-induced beam shifts by weak measurement

Wenjin Long, Jintao Pan, Xinyi Guo +11 more

Weak measurement for orbital angular momentum (OAM)-induced spatial shifts of vortex beams are still confusing. The beam shift will be amplified by selecting the appropriate pre-selected and post-selected states. Here the maximum shifts are theoretically predicted and experimentally verified with optimal preselection and postselection states.

The Japan Society of Applied Physics•Sep 18, 2019•0 citations
Weak measurement, which can amplify a weak signal, has shown great significance in precision measurements. The amplification is usually realized through the weak value and the propagation factor. We show that the orbital angular momentum (OAM) can provide another dimension for amplification that is linearly proportional to the OAM number. We employ OAM to measure the spin Hall effect of light and demonstrate that the OAM-enabled amplification is compatible with the weak value amplification and the propagation amplification. This work is probable to promote the application of OAM in precision measurements.
We present a weak measurement protocol that permits a sensitive estimation of angular rotations based on the concept of weak-value amplification. The shift in the state of a pointer, in both angular position and the conjugate orbital angular momentum bases, is used to estimate angular rotations. This is done by an amplification of both the real and imaginary parts of the weak-value of a polarization operator that has been coupled to the pointer, which is a spatial mode, via a spin-orbit coupling. Our experiment demonstrates the first realization of weak-value amplification in the azimuthal degree of freedom. We have achieved effective amplification factors as large as 100, providing a sensitivity that is on par with more complicated methods that employ quantum states of light or extremely large values of orbital angular momentum.
The basics of weak measurement and its various applications are discussed here. The optical analogue of weak measurement. which was predicted by E C G Sudarshan was also demonstrated with the experimental results. The optical activity of chiral molecules is also calculated with the help of weak measurement. We also demonstrate simultaneous weak value amplification of both the angular GH and the IF shifts in partial reflection of a fundamental Gaussian beam at planar dielectric interfaces. We employ pre and post selection schemes with appropriate linear polarization basis states for simultaneous weak measurements and amplification of both of these shifts.We also studied these GH and IF shifts for higher order beams (for example Vortex beams)and how its get coupled. Geometric Hall effect of light is also studied with the help of weak measurement and we get the expected nature according to the theory.
We proposed and analyzed a scheme of precisely measuring orbital angular momentum (OAM) of the vortex beams with the help of weak measurement process. The orbital angular momentum information lll of the unknown OAM state can be obtained by its spatial displacements. The valid condition of precisely measuring orbital angular momentum was completely discussed. Interestingly, it is shown that the measurement by using the two-dimensional spatial displacements jointly is very useful for precisely measuring the OAM state with a large orbital angular momentum lll. The signal-to-noise ratio of the measurement can be enhanced by increasing the weak-coupling $\ensuremath{\gamma}$ linearly as the valid condition is still satisfied. For fixed $\ensuremath{\gamma}$, the maximal signal-to-noise ratio for each weak value increases with the decrease of the weak value.
We develop a weak measurement scheme for measuring orbital angular momentum (OAM) of light based on the global topology in wave function. We introduce the spin-orbit coupling to transform the measurement of OAM to the pre- and postselected measurement of polarization. The OAM number can be precisely and promptly recognized using single-shot detection without the need for spatial resolution. More significantly, the measurement results exhibit topological robustness under random phase perturbations. This scheme has the potential to be applied as a paradigm in the OAM-based optical computing, metrology and communication.