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 Experimental and Theoretical Physics

Theory and interpretation of the quantum teleportation effect

Давид Николаевич Клышко

Published Oct 1, 1998• 7 citations
Publisher

Abstract

Recently published optical experiments which investigate the effect of “quantum teleportation” are analyzed. It is shown that the occurrence of teleportation (copying) of the polarization of one photon onto another requires that an optical shutter be added to the experimental setup, opening automatically only upon the occurrence of certain favorable events. An instructive model is proposed, along with a classical analog of the effect, and various treatments are discussed. It is emphasized that the concepts of “reduction of the wave function” and “quantum nonlocality” are not necessary for a quantitative description of the effect: the standard formalism proves to be sufficient.

DOI
10.1134/1.558705

Related papers

Teleportation of Continuous Quantum Variables: A New Approach

Shigeaki Nagamachi, Erwin Brüning

Teleportation of optical field states (as continuous quantum variables) is usually described in terms of Wigner functions. This is in marked contrast to the theoretical treatment of teleportation of qubits. In this paper we show that by using the holomorphic representation of the canonical commutation relations, teleportation of continuous quantum variables can be treated in complete analogy to the case of teleportation of qubits. In order to emphasize this analogy, short descriptions of the basic experimental schemes both for teleportation of qubits and of continuous variables are included. We conclude our paper with a brief discussion of the effectiveness of our description of continuous variable teleportation and of the role of localization of quantum states in teleportation problems.

arXiv:0906.0837•Jun 4, 2009•0 citations

Quantum teleportation of a photon's polarization using an optical gate

Давид Николаевич Клышко

The possibility to copy the unknown polarization of a photon to another photon is considered. The initial idea of quantum teleportation by measuring the Bell operator, describing the polarization, correlations of two photons, seems to be practically unrealizable and the corresponding experiments have been interpreted incorrectly. An alternative method using the optical gate is proposed.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Feb 25, 1999•0 citations

Classical Simulation of Quantum Teleportation

Brian R. La Cour

Teleportation is considered to be a uniquely quantum phenomena. This paper demonstrates that the teleportation of quantum states in optical experiments can be under-stood from a purely classical perspective.

Quantum 2.0 Conference and Exhibition•Jan 1, 2023•0 citations

John Bell's Varying Interpretations of Quantum Mechanics: Memories and Comments

H. D. Zeh

Various interpretations of quantum mechanics, favored (or neglected) by John Bell in the context of his nonlocality theorem, are compared and discussed. Varenna 1970 I met John Bell for the first time at the Varenna conference of 1970 [1]. I had been invited on the suggestion of Eugene P. Wigner, who had already helped me to publish my first paper on the concept that was later called decoherence – to appear in the first issue of Foundations of Physics a few months after the conference [2]. This concept arose from my conviction, based on many applications of quantum mechanics to composite systems under various conditions, that Schrödinger's wave function in configuration space, or more generally the superposition principle, is universally valid and applicable. In particular, stable narrow wavepackets can represent classical configurations, while their superpositions define novel individual properties – such as “momentum,” defined as a plane wave superposition of different positions. Superpositions of macroscopically different properties, on the other hand, are regularly irreversibly “dislocalized” (distributed over many degrees of freedom) by means of interactions described by the Schrödinger equation. The corresponding disappearance of certain local superpositions (“decoherence”) seems to explain the phenomenon of a classical world as well as the apparent occurrence of quantum jumps or stochastic “events” – see Sect. 20.4 or [3] for a historical overview of the conceptual development of quantum theory. So I had never felt any motivation to think of “hidden variables” or any other physics behind the successful wave function. Therefore, I was very surprised on my arrival in Varenna to hear everybody discuss Bell's inequality. It had been published a few years before the conference, but I had either not noticed it or not regarded it as particularly remarkable until then. As this inequality demonstrates that the predictions of quantum theory would require any conceivable reality possibly underlying the nonlocal wave function to be nonlocal itself, I simply found my conviction that the latter describes individual reality confirmed. For example, I had often discussed the conservation of total spin or angular momentum in an individual decay process, which requires nonlocal entanglement between the fragments at any distance in a form that was later called a “Bell state”.

Cambridge University Press eBooks•Aug 31, 2016•2 citations

Basic quantum mechanical concepts from the operational viewpoint

Давид Николаевич Клышко

The physical meaning of the basic quantum mechanical concepts (such as the wave function, reduction, state preparation and measurement, the projection postulate, and the uncertainty principle) is clarified using realistic experimental procedures and employing classical analogies whenever possible. Photon polarization measurement and particle coordinate and momentum measurement are considered as examples, as also are Einstein–Podolsky–Rosen correlations, Aharonov–Bohm effects, quantum teleportation, etc. Various nonclassicality criteria of quantum models, including photon antibunching and the violation of the Bell inequality, are discussed.

Physics-Uspekhi•Sep 30, 1998•48 citations

Quantum Optics in Information and Control

Teo Zhi, Wei Colin

The field of Quantum Optics has transitioned from the original study of the coherences of light, to its present day focus on the treatment of the interactions of matter with various quantum states of lights. This transition was spurred, in part, by the predicted potential of Quantum Information Processing protocols. These protocols take advantage of the coherent nature of quantum states and have been shown to be useful in numerous settings. However, the delicate nature of these coherences make scalability a real concern in realistic systems. Quantum Control is one particular tool to address this facet of Quantum Information Processing and has been used in experiments to great effect. In this thesis, we present our study of the use of Quantum Optics in Quantum Information and Quantum Control. We first introduce some results of InputOutput Theory, which is an elegant formalism to treat open quantum systems. Following which, we expound on work done in collaboration with colleagues from Brazil on a proposal for a loophole-free Bell test. This builds on the results derived using Input-Output theory and includes a semi-analytical formalism to perform the optimization of the Bell inequality. The treatment of this problem is then used to show that with existing optical cavity setups, one is able to produce the required states with a fidelity sufficient to violate a Bell inequality. Next, we present a description of an experiment to produce entangled photon pairs using four-wave mixing, done in collaboration with the experimental group in CQT. Finally, we present a study of quantum optimal control which highlights non-intuitive concepts of Optimal Control Theory.

•Jan 1, 2013•1 citation
Recently published optical experiments which investigate the effect of “quantum teleportation” are analyzed. It is shown that the occurrence of teleportation (copying) of the polarization of one photon onto another requires that an optical shutter be added to the experimental setup, opening automatically only upon the occurrence of certain favorable events. An instructive model is proposed, along with a classical analog of the effect, and various treatments are discussed. It is emphasized that the concepts of “reduction of the wave function” and “quantum nonlocality” are not necessary for a quantitative description of the effect: the standard formalism proves to be sufficient.
Teleportation of optical field states (as continuous quantum variables) is usually described in terms of Wigner functions. This is in marked contrast to the theoretical treatment of teleportation of qubits. In this paper we show that by using the holomorphic representation of the canonical commutation relations, teleportation of continuous quantum variables can be treated in complete analogy to the case of teleportation of qubits. In order to emphasize this analogy, short descriptions of the basic experimental schemes both for teleportation of qubits and of continuous variables are included. We conclude our paper with a brief discussion of the effectiveness of our description of continuous variable teleportation and of the role of localization of quantum states in teleportation problems.
Various interpretations of quantum mechanics, favored (or neglected) by John Bell in the context of his nonlocality theorem, are compared and discussed. Varenna 1970 I met John Bell for the first time at the Varenna conference of 1970 [1]. I had been invited on the suggestion of Eugene P. Wigner, who had already helped me to publish my first paper on the concept that was later called decoherence – to appear in the first issue of Foundations of Physics a few months after the conference [2]. This concept arose from my conviction, based on many applications of quantum mechanics to composite systems under various conditions, that Schrödinger's wave function in configuration space, or more generally the superposition principle, is universally valid and applicable. In particular, stable narrow wavepackets can represent classical configurations, while their superpositions define novel individual properties – such as “momentum,” defined as a plane wave superposition of different positions. Superpositions of macroscopically different properties, on the other hand, are regularly irreversibly “dislocalized” (distributed over many degrees of freedom) by means of interactions described by the Schrödinger equation. The corresponding disappearance of certain local superpositions (“decoherence”) seems to explain the phenomenon of a classical world as well as the apparent occurrence of quantum jumps or stochastic “events” – see Sect. 20.4 or [3] for a historical overview of the conceptual development of quantum theory. So I had never felt any motivation to think of “hidden variables” or any other physics behind the successful wave function. Therefore, I was very surprised on my arrival in Varenna to hear everybody discuss Bell's inequality. It had been published a few years before the conference, but I had either not noticed it or not regarded it as particularly remarkable until then. As this inequality demonstrates that the predictions of quantum theory would require any conceivable reality possibly underlying the nonlocal wave function to be nonlocal itself, I simply found my conviction that the latter describes individual reality confirmed. For example, I had often discussed the conservation of total spin or angular momentum in an individual decay process, which requires nonlocal entanglement between the fragments at any distance in a form that was later called a “Bell state”.
The physical meaning of the basic quantum mechanical concepts (such as the wave function, reduction, state preparation and measurement, the projection postulate, and the uncertainty principle) is clarified using realistic experimental procedures and employing classical analogies whenever possible. Photon polarization measurement and particle coordinate and momentum measurement are considered as examples, as also are Einstein–Podolsky–Rosen correlations, Aharonov–Bohm effects, quantum teleportation, etc. Various nonclassicality criteria of quantum models, including photon antibunching and the violation of the Bell inequality, are discussed.
The field of Quantum Optics has transitioned from the original study of the coherences of light, to its present day focus on the treatment of the interactions of matter with various quantum states of lights. This transition was spurred, in part, by the predicted potential of Quantum Information Processing protocols. These protocols take advantage of the coherent nature of quantum states and have been shown to be useful in numerous settings. However, the delicate nature of these coherences make scalability a real concern in realistic systems. Quantum Control is one particular tool to address this facet of Quantum Information Processing and has been used in experiments to great effect. In this thesis, we present our study of the use of Quantum Optics in Quantum Information and Quantum Control. We first introduce some results of InputOutput Theory, which is an elegant formalism to treat open quantum systems. Following which, we expound on work done in collaboration with colleagues from Brazil on a proposal for a loophole-free Bell test. This builds on the results derived using Input-Output theory and includes a semi-analytical formalism to perform the optimization of the Bell inequality. The treatment of this problem is then used to show that with existing optical cavity setups, one is able to produce the required states with a fidelity sufficient to violate a Bell inequality. Next, we present a description of an experiment to produce entangled photon pairs using four-wave mixing, done in collaboration with the experimental group in CQT. Finally, we present a study of quantum optimal control which highlights non-intuitive concepts of Optimal Control Theory.