Generation of entanglement and non-stationary states via competing coherent and incoherent bosonic hopping

Parvinder Solanki; Albert Cabot; Matteo Brunelli; Federico Carollo; Christoph Bruder; Igor Lesanovsky

doi:10.1103/vnt1-m777

Generation of entanglement and non-stationary states via competing coherent and incoherent bosonic hopping

Parvinder Solanki
, Albert Cabot
, Matteo Brunelli
, Federico Carollo
, Christoph Bruder
, Igor Lesanovsky

Research Centre for Fluid and Complex Systems

Research output: Contribution to journal › Letter › peer-review

1 Citation (Scopus)

Abstract

Incoherent stochastic processes added to unitary dynamics are typically deemed detrimental since they are expected to diminish quantum features such as superposition and entanglement. Instead of exhibiting energy-conserving persistent coherent motion, the dynamics of such open systems feature, in most cases, a steady state, which is approached in the long-time limit from all initial conditions. This can, in fact, be advantageous as it offers a mechanism for the creation of robust quantum correlations on demand without the need for fine-tuning. Here, we show this for a system consisting of two coherently coupled bosonic modes, which is a paradigmatic scenario for the realization of quantum resources such as squeezed entangled states. Rather counterintuitively, the mere addition of incoherent hopping, which results in a statistical coupling between the bosonic modes, leads to steady states with robust quantum entanglement and enables the emergence of persistent coherent nonstationary behavior.

Original language	English
Article number	L030601
Number of pages	7
Journal	Physical Review A
Volume	112
Issue number	3
DOIs	https://doi.org/10.1103/vnt1-m777
Publication status	Published - 11 Sept 2025

Bibliographical note

Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.

This document is the author’s post-print version, incorporating any revisions agreed during the peer-review process. Some differences between the published version and this version may remain and you are advised to consult the published version if you wish to cite from it.

Funding

Acknowledgments. P.S. acknowledges support from the Alexander von Humboldt Foundation through a Humboldt research fellowship for postdoctoral researchers. C.B. and P.S. acknowledge financial support from the Swiss National Science Foundation individual grant (Grant No. 200020 200481). F.C. is indebted to the Baden-Württemberg Stiftung for the financial support of this research project by the Eliteprogramme for Postdocs. A.C. acknowledges support from the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through the Walter Benjamin program, Grant No. 519847240. M.B. acknowledges funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (Grant Agreement No. 101002955—CONQUER). This work was supported by the QuantERA II program (project CoQuaDis, DFG Grant No. 532763411) that has received funding from the European Union's Horizon 2020 research and innovation program under Grant Agreement No. 101017733. We also acknowledge funding from the DFG through the Research Unit FOR 5413/1, Grant No. 465199066.

Keywords

Open quantum systems & decoherence
PT-symmetric quantum mechanics
Quantum correlations in quantum information
Quantum correlations, foundations & formalism
Quantum-to-classical transition
Semiclassical physics

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10.1103/vnt1-m777

Carollo2025AAMAccepted author manuscript, 5.87 MB

Cite this

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abstract = "Incoherent stochastic processes added to unitary dynamics are typically deemed detrimental since they are expected to diminish quantum features such as superposition and entanglement. Instead of exhibiting energy-conserving persistent coherent motion, the dynamics of such open systems feature, in most cases, a steady state, which is approached in the long-time limit from all initial conditions. This can, in fact, be advantageous as it offers a mechanism for the creation of robust quantum correlations on demand without the need for fine-tuning. Here, we show this for a system consisting of two coherently coupled bosonic modes, which is a paradigmatic scenario for the realization of quantum resources such as squeezed entangled states. Rather counterintuitively, the mere addition of incoherent hopping, which results in a statistical coupling between the bosonic modes, leads to steady states with robust quantum entanglement and enables the emergence of persistent coherent nonstationary behavior.",

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N2 - Incoherent stochastic processes added to unitary dynamics are typically deemed detrimental since they are expected to diminish quantum features such as superposition and entanglement. Instead of exhibiting energy-conserving persistent coherent motion, the dynamics of such open systems feature, in most cases, a steady state, which is approached in the long-time limit from all initial conditions. This can, in fact, be advantageous as it offers a mechanism for the creation of robust quantum correlations on demand without the need for fine-tuning. Here, we show this for a system consisting of two coherently coupled bosonic modes, which is a paradigmatic scenario for the realization of quantum resources such as squeezed entangled states. Rather counterintuitively, the mere addition of incoherent hopping, which results in a statistical coupling between the bosonic modes, leads to steady states with robust quantum entanglement and enables the emergence of persistent coherent nonstationary behavior.

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Generation of entanglement and non-stationary states via competing coherent and incoherent bosonic hopping

Abstract

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