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

arXiv:quant-ph/9607028 · Physical Review Letters

Comment on “Creating Metastable Schrödinger Cat States”

Mauro Fortunato

Published Sep 9, 1996• 1 citation
arXivHTMLPDF

Abstract

After a careful analysis of the feedback model recently proposed by Slosser and Milburn [Phys. Rev. Lett. 75, 418 (1995)], we are led to the conclusion that---under realistic conditions---their scheme is not significantly more effective in the production of linear superpositions of macroscopically distinguishable quantum states than the usual quantum-optical Kerr effect.

DOI
10.1103/physrevlett.77.2336

Related papers

Creating Metastable Schrödinger Cat States

John J. Slosser, Gerard J Milburn

We propose a scheme using feedback to generate a macroscopic quantum superposition of coherent states in an optical cavity mode which experiences very little decoherence (due to dissipation).Received 9 November 1994DOI:https://doi.org/10.1103/PhysRevLett.75.418©1995 American Physical Society

Physical Review Letters•Jul 17, 1995•19 citations

All-Optical Model for the Generation and the Detection of Macroscopic Quantum Coherence

P. Tombesi, David Vitali

We show that with a suitable modification of the model proposed by Yurke, Schleich, and Walls [Phys. Rev. A 42, 1703 (1990)] for the generation of linear superpositions of macroscopically distinct quantum states, it is possible to arrange a scheme for generating and detecting optical Schr\"odinger catlike states which is experimentally feasible with current technologies.

Physical Review Letters•Jul 15, 1996•18 citations

Generation and Detection of Linear Superpositions of Classically Distinguishable States of a Radiation Mode

David Vitali, P. Tombesi

A full comprehension of the fuzzy boundary between the classical and the quantum world is still lacking. A deeper understanding of the problem can be obtained form the study of the so-called "Schrödinger cat states", i.e. the paradoxical states arising when the superposition principle of quantum mechanics is extended to the macroscopic world. Quantum optics is, up to now, the most studied field for the experimental realization of these states. A survey of all the proposals made for generating and detecting linear superpositions of classically distinguishable states in quantum optical systems is presented. Then, one of the most recent proposals [P. Tombesi and D. Vitali, Phys. Rev. Lett.77, 411 (1996)] is presented in detail and its experimental feasibility discussed.

International Journal of Modern Physics B•Jul 20, 1997•3 citations

Generating entangled superpositions of macroscopically distinguishable states within a parametric oscillator

F. De Martini, Mauro Fortunato, Paolo Tombesi +1 more

We suggest a variant of the recently proposed experiment for the generation of a kind of mesoscopic superposition quantum state (a Schr\"odinger-cat-type state), using two coupled parametric down-converter nonlinear crystals [F. De Martini, Phys. Rev. Lett. 81, 2842 (1998)]. We study the parametric oscillator case and find that an entangled Schr\"odinger-cat-type state of two cavities, whose mirrors are placed along the output beams of the nonlinear crystals, can be realized under suitable conditions.

arXiv:quant-ph/9902082•Physical Review A•Aug 1, 1999•19 citations

Creating Metastable Schrodinger Cat States

John J. Slosser, Gerard J Milburn

When the feedback process is optimized for minimum noise, the coefficient of the noise term [the second term in Eq. 9 of our paper] should be x not x 2 as stated.The value of x remains the same.The solutions go through much the same with this replacement throughout.This means that large values of x are not quite so serious as suggested by our original equation.In reality x is likely to be quite small, so a dependence on x rather than x 2 is unfortunate.I would like to thank Howard Wiseman for pointing out the incorrect dependence on x in our original paper.

Physical Review Letters•Sep 9, 1996•2 citations

Comment on arXiv:1105.6334 "Optical nonlinearity in Ar and N$_2$ near the ionization threshold"

Günter Steinmeyer, Ayhan Demircan, Carsten Brée

In a recent publication [Phys. Rev. Lett. 107, 103901 (2011)], Wahlstrand et al. reported to observe no indications for the appearance of the higher-order Kerr effect in a parameter regime that was previously found to display this phenomenon [Opt. Express 17, 13429 (2009)]. Here we show that careful analysis of the original experimental data of Wahlstrand et al. reveals a 22% saturation, i.e., direct proof for the appearance of the higher-order Kerr effect. In the light of these findings, the validity of Wahlstrand et al.'s main conclusions appears highly questionable.

arXiv:1110.0701•Oct 4, 2011•0 citations
After a careful analysis of the feedback model recently proposed by Slosser and Milburn [Phys. Rev. Lett. 75, 418 (1995)], we are led to the conclusion that---under realistic conditions---their scheme is not significantly more effective in the production of linear superpositions of macroscopically distinguishable quantum states than the usual quantum-optical Kerr effect.
A full comprehension of the fuzzy boundary between the classical and the quantum world is still lacking. A deeper understanding of the problem can be obtained form the study of the so-called "Schrödinger cat states", i.e. the paradoxical states arising when the superposition principle of quantum mechanics is extended to the macroscopic world. Quantum optics is, up to now, the most studied field for the experimental realization of these states. A survey of all the proposals made for generating and detecting linear superpositions of classically distinguishable states in quantum optical systems is presented. Then, one of the most recent proposals [P. Tombesi and D. Vitali, Phys. Rev. Lett.77, 411 (1996)] is presented in detail and its experimental feasibility discussed.
We suggest a variant of the recently proposed experiment for the generation of a kind of mesoscopic superposition quantum state (a Schr\"odinger-cat-type state), using two coupled parametric down-converter nonlinear crystals [F. De Martini, Phys. Rev. Lett. 81, 2842 (1998)]. We study the parametric oscillator case and find that an entangled Schr\"odinger-cat-type state of two cavities, whose mirrors are placed along the output beams of the nonlinear crystals, can be realized under suitable conditions.
When the feedback process is optimized for minimum noise, the coefficient of the noise term [the second term in Eq. 9 of our paper] should be x not x 2 as stated.The value of x remains the same.The solutions go through much the same with this replacement throughout.This means that large values of x are not quite so serious as suggested by our original equation.In reality x is likely to be quite small, so a dependence on x rather than x 2 is unfortunate.I would like to thank Howard Wiseman for pointing out the incorrect dependence on x in our original paper.
Comment on arXiv:1105.6334 "Optical nonlinearity in Ar and N2_22​ near the ionization threshold"
In a recent publication [Phys. Rev. Lett. 107, 103901 (2011)], Wahlstrand et al. reported to observe no indications for the appearance of the higher-order Kerr effect in a parameter regime that was previously found to display this phenomenon [Opt. Express 17, 13429 (2009)]. Here we show that careful analysis of the original experimental data of Wahlstrand et al. reveals a 22% saturation, i.e., direct proof for the appearance of the higher-order Kerr effect. In the light of these findings, the validity of Wahlstrand et al.'s main conclusions appears highly questionable.