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

Journal of the Optical Society of Korea

Another Quantum Eraser Experiment with Two-photon States of Light

Taesoo Kim, Jeong-Hoon Ko, Heonoh Kim

Published Sep 1, 2002• 2 citations
Publisher

Abstract

The quantum eraser experiment was revisited, using entangled photons of visible light in a Hong-Ou-Handel type interferometer with a magnitude two orders higher than before in count rates. We introduced which-path information by polarization and subsequently erasied this information by means of polarizers in front of detectors. It was found that the visibility of the interference fringe is revived from 0% to 88% as the polarizers are changed from 0 $^{\circ}$ to 45 $^{\circ}$ .

DOI
10.3807/josk.2002.6.3.100

Related papers

Quantum-eraser experiment with frequency-entangled photon pairs

Heonoh Kim, Jeong-Hoon Ko, Taesoo Kim

We report a quantum-eraser experiment with frequency-entangled photon pairs generated by nondegenerate parametric down conversion. The relationship between which-path information and two-photon fringe visibility has been investigated by means of photon polarizations in a Hong-Ou-Mandel interferometer. Although photons are not of the same frequency and are not superposed at the beam splitter, the results of the experiment show the revival of the fringe pattern by removing the path information in the interferometer by means of polarizations in front of the detectors.

Physical Review A•May 29, 2003•25 citations

Observation of a ‘‘quantum eraser’’: A revival of coherence in a two-photon interference experiment

Paul G. Kwiat, Aephraim M. Steinberg, R. Y. Chiao

We have observed an effect known as a quantum eraser, using a setup similar to one previously employed to demonstrate a violation of Bell's inequalities. In this effect, an interfering system is first rendered incoherent by making the alternate Feynman paths which contribute to the overall process distinguishable; with our apparatus this is achieved by placing a half wave plate in one arm of a Hong-Ou-Mandel interferometer so as to rotate the polarization of the light in that arm by 90\ifmmode^\circ\else\textdegree\fi{}. This adds information to the system, in that polarization is a new parameter which serves to label the path of a given photon, even after a recombining beam splitter. The quantum ``eraser'' removes this information from the state vector, after the output port of the interferometer, but in time to cause interference effects to reappear upon coincidence detection. For this purpose, we use two polarizers in front of our detectors. We present experimental results showing how the degree of erasure (which determines the visibility of the interference) depends on the relative orientation of the polarizers, along with theoretical curves. In addition, we show how this procedure may do more than merely erase, in that the act of ``pasting together'' two previously distinguishable paths can introduce a new relative phase between them.

Physical Review A•Jun 1, 1992•297 citations

Demystifying quantum weirdness in delayed-choice quantum eraser experiment using entangled photons

Matthew Besana Dinglasan, John Paul A. Besagas, Eric A. Galapon

We have constructed the full density matrix for the quantum eraser experiment using two entangled photons in [Y. Kim et al., Phys. Rev. Lett. 84, 1 (2000)] by tracing the evolution of the initial entangled state to its final state when it reaches the different detectors. Several projective measurements were made on the full density matrix of the entangled system to exhibit the presence or absence of interference fringes which corresponds to the availability of the which path information. The results of the projective measurements agree with the experimental results. Therefore, all the information that can be accessed in the quantum eraser eraser experiment can be obtained in the full density matrix of the system and it is only a matter of postselecting the data points to exhibit the presence or absence of interference fringes.

Proceedings of the Samahang Pisika ng Pilipinas•May 23, 2019•0 citations

Observation of Geometric Phases in Quantum Erasers

H. Kobayashi, Shuhei Tamate, Toshihiro Nakanishi +2 more

We introduce a simple experiment involving a double-slit interferometer by which one can learn basic concepts of quantum interference such as which-path marking, quantum erasers, and geometric phases. Each of them exhibits seemingly mysterious phenomena in quantum physics. In our experiment, we use the double-slit interference of visible light with the polarization as an internal state to demonstrate the disappearance of fringes by which-path marking, recovery of interference using quantum erasers, and the rapid shifting of the fringe pattern induced by the geometric phase. We also present a simple theoretical analysis of an interferometer with an internal state.

arXiv:0907.2289•Journal of the Physical Society of Japan•Feb 25, 2011•18 citations

Quantitative wave-particle duality and nonerasing quantum erasure

Peter D. D. Schwindt, Paul G. Kwiat, Berthold‐Georg Englert

The notion of wave-particle duality may be quantified by the inequality ${V}^{2}{+K}^{2}<~1,$ relating interference fringe visibility V, and path knowledge K. With a single-photon interferometer in which polarization is used to label the paths, we have investigated the relation for various situations, including pure, mixed, and partially mixed input states. A quantum-eraser scheme has been realized that recovers interference fringes even when no which way information is available to erase.

arXiv:quant-ph/9908072•Physical Review A•Dec 1, 1999•160 citations

Phase-selective quantum eraser

Axel Heuer, Gregor Pieplow, R. Menzel

A quantum-eraser experiment with photon pairs coupled via induced coherence is reported, and the complementarity between which-source information and two-photon-interference-fringe visibility is demonstrated.

arXiv:1501.00817•Physical Review A•Jul 2, 2015•4 citations
The quantum eraser experiment was revisited, using entangled photons of visible light in a Hong-Ou-Handel type interferometer with a magnitude two orders higher than before in count rates. We introduced which-path information by polarization and subsequently erasied this information by means of polarizers in front of detectors. It was found that the visibility of the interference fringe is revived from 0% to 88% as the polarizers are changed from 0 ∘^{\circ}∘ to 45 ∘^{\circ}∘ .
We report a quantum-eraser experiment with frequency-entangled photon pairs generated by nondegenerate parametric down conversion. The relationship between which-path information and two-photon fringe visibility has been investigated by means of photon polarizations in a Hong-Ou-Mandel interferometer. Although photons are not of the same frequency and are not superposed at the beam splitter, the results of the experiment show the revival of the fringe pattern by removing the path information in the interferometer by means of polarizations in front of the detectors.
We have observed an effect known as a quantum eraser, using a setup similar to one previously employed to demonstrate a violation of Bell's inequalities. In this effect, an interfering system is first rendered incoherent by making the alternate Feynman paths which contribute to the overall process distinguishable; with our apparatus this is achieved by placing a half wave plate in one arm of a Hong-Ou-Mandel interferometer so as to rotate the polarization of the light in that arm by 90\ifmmode^\circ\else\textdegree\fi{}. This adds information to the system, in that polarization is a new parameter which serves to label the path of a given photon, even after a recombining beam splitter. The quantum ``eraser'' removes this information from the state vector, after the output port of the interferometer, but in time to cause interference effects to reappear upon coincidence detection. For this purpose, we use two polarizers in front of our detectors. We present experimental results showing how the degree of erasure (which determines the visibility of the interference) depends on the relative orientation of the polarizers, along with theoretical curves. In addition, we show how this procedure may do more than merely erase, in that the act of ``pasting together'' two previously distinguishable paths can introduce a new relative phase between them.
We have constructed the full density matrix for the quantum eraser experiment using two entangled photons in [Y. Kim et al., Phys. Rev. Lett. 84, 1 (2000)] by tracing the evolution of the initial entangled state to its final state when it reaches the different detectors. Several projective measurements were made on the full density matrix of the entangled system to exhibit the presence or absence of interference fringes which corresponds to the availability of the which path information. The results of the projective measurements agree with the experimental results. Therefore, all the information that can be accessed in the quantum eraser eraser experiment can be obtained in the full density matrix of the system and it is only a matter of postselecting the data points to exhibit the presence or absence of interference fringes.
We introduce a simple experiment involving a double-slit interferometer by which one can learn basic concepts of quantum interference such as which-path marking, quantum erasers, and geometric phases. Each of them exhibits seemingly mysterious phenomena in quantum physics. In our experiment, we use the double-slit interference of visible light with the polarization as an internal state to demonstrate the disappearance of fringes by which-path marking, recovery of interference using quantum erasers, and the rapid shifting of the fringe pattern induced by the geometric phase. We also present a simple theoretical analysis of an interferometer with an internal state.
The notion of wave-particle duality may be quantified by the inequality V2+K2< 1,{V}^{2}{+K}^{2}<~1,V2+K2< 1, relating interference fringe visibility V, and path knowledge K. With a single-photon interferometer in which polarization is used to label the paths, we have investigated the relation for various situations, including pure, mixed, and partially mixed input states. A quantum-eraser scheme has been realized that recovers interference fringes even when no which way information is available to erase.