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

Weak-value Amplification of Low-light-level Cross Phase Modulation

Amir Feizpour, Greg Dmochowski, Matin Hallaji, Chao Zhuang, Alex Hayat, Aephraim M. Steinberg

Published Jan 1, 2013• 0 citations
Publisher

Abstract

We report on our experimental progress towards observing weak-value amplification of low-light-level cross-phase modulation which will be the first observation of a weak measurement relying on true entanglement between distinct systems.
DOI
10.1364/cleo_at.2013.jw2a.02

Related papers

Signal-to-Noise Ratio Enhancement in Weak Measurement, and its Application to Observing Single-Photon-Level Nonlinearities

Amir Feizpour, Xingxgin Xing, Aephraim M. Steinberg

We show theoretically that weak-value amplification can enhance the signal-to-noise ratio in the presence of noise with long correlation times, in particular for measurements of single-photon-level nonlinearities.

Conference on Lasers and Electro-Optics•Jan 1, 2012•0 citations

Detecting multilevel entanglement from light-based entanglement witnesses

Pedro Rosário, Romain Bachelard

Physical Review A•Oct 7, 2026•0 citations

Low-Light-Level Cross-Phase Modulation with Double Slow Light Pulses

Bor-Wen Shiau, Meng-Chang Wu, Chi-Ching Lin +1 more

We report on the first experimental demonstration of low-light-level cross-phase modulation (XPM) with double slow light pulses based on the double electromagnetically induced transparency (EIT) in cold cesium atoms. The double EIT is implemented with two control fields and two weak fields that drive populations prepared in the two doubly spin-polarized states. Group velocity matching can be obtained by tuning the intensity of either of the control fields. The XPM is based on the asymmetric M-type five-level system formed by the two sets of EIT. Enhancement in the XPM by group velocity matching is observed. Our work advances studies of low-light-level nonlinear optics based on double slow light pulses.

Physical Review Letters•May 11, 2011•91 citations

Enhancing quantum entanglement by means of weak measurement under various environments

Yinghua Ji, Yongmei Liu

Optik•Jan 22, 2016•3 citations

A realistic amplification scheme for postselected weak measurement with classical explanation and a new cross-Kerr effect on thermal light

Tao Wang, Lin-Hai Jiang, Gang Li +2 more

In common sense, postselected weak amplification must be related to destructive interference effect of the meter system, and a single photon exerts no effect on thermal field via cross-phasemodulation (XPM) interaction. In this Letter we present, for the first time, a thermal light cross-Kerr effect. Through analysis, we reveal two unexpected results: i) postselection and weak amplification can be explained at a classical level without destructive interference, and ii) weak amplification and weak value are not one thing. After postselection a new mixed light can be generated which is nonclassical. This scheme can be realized via electromagnetically-induced transparency.

•Sep 8, 2015•0 citations

Measuring the complex weak value of photon wavefunctions beyond weak interaction regime

Kai Wang, Steffen Weimann, Tim Richardt +5 more

We measure the complex weak value beyond the weak interaction regime between the measurement apparatus and the measured photon wavefunction based on the direct measurement scheme.

Frontiers in Optics•Jan 1, 2017•0 citations
We report on the first experimental demonstration of low-light-level cross-phase modulation (XPM) with double slow light pulses based on the double electromagnetically induced transparency (EIT) in cold cesium atoms. The double EIT is implemented with two control fields and two weak fields that drive populations prepared in the two doubly spin-polarized states. Group velocity matching can be obtained by tuning the intensity of either of the control fields. The XPM is based on the asymmetric M-type five-level system formed by the two sets of EIT. Enhancement in the XPM by group velocity matching is observed. Our work advances studies of low-light-level nonlinear optics based on double slow light pulses.
In common sense, postselected weak amplification must be related to destructive interference effect of the meter system, and a single photon exerts no effect on thermal field via cross-phasemodulation (XPM) interaction. In this Letter we present, for the first time, a thermal light cross-Kerr effect. Through analysis, we reveal two unexpected results: i) postselection and weak amplification can be explained at a classical level without destructive interference, and ii) weak amplification and weak value are not one thing. After postselection a new mixed light can be generated which is nonclassical. This scheme can be realized via electromagnetically-induced transparency.