Selective filtering of photonic quantum entanglement via anti–parity-time symmetry

Entanglement is a key resource for quantum computing, sensing, and communication, but it is susceptible to decoherence. To address this, research in quantum optics has explored filtering techniques such as photon ancillas and Rydberg atom blockade to restore entangled states. We introduce an approach to entanglement retrieval that exploits the features of non-Hermitian systems. By designing an anti-parity-time two-state guiding configuration, we demonstrate efficient extraction of entanglement from any input state. This filter is implemented on a lossless waveguide network and achieves near-unity fidelity under single- and two-photon excitation and is scalable to higher photon levels, remaining robust against decoherence during propagation. Our results offer an approach to using non-Hermitian symmetries to address central challenges in quantum technologies.

Authors

Institutions

Publication Details

Journal
Science
Published
2025-03-27
DOI
https://doi.org/10.1126/science.adu3777
Citations
14
Primary Topic
Quantum Mechanics and Non-Hermitian Physics
Type
article
Field-Weighted Citation Impact
17.45
Controls
|||
ALL TIME
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
article

Selective filtering of photonic quantum entanglement via anti–parity-time symmetry

Matthias Heinrich, Hossein T. Dinani, Demetrios N. Christodoulides, Şahin Kaya Özdemir et al.
14 citations
Science
Quantum Mechanics and Non-Hermitian Physics
17.45
article

Selective filtering of photonic quantum entanglement via anti–parity-time symmetry

Matthias Heinrich, Hossein T. Dinani, Demetrios N. Christodoulides, Şahin Kaya Özdemir, Armando Pérez-Leija, Mahmoud A. Selim, Max Ehrhardt, Mercedeh Khajavikhan, Alexander Szameit, Qi Zhong, Yuqiang Ding
article en
14 citations

Abstract

Entanglement is a key resource for quantum computing, sensing, and communication, but it is susceptible to decoherence. To address this, research in quantum optics has explored filtering techniques such as photon ancillas and Rydberg atom blockade to restore entangled states. We introduce an approach to entanglement retrieval that exploits the features of non-Hermitian systems. By designing an anti-parity-time two-state guiding configuration, we demonstrate efficient extraction of entanglement from any input state. This filter is implemented on a lossless waveguide network and achieves near-unity fidelity under single- and two-photon excitation and is scalable to higher photon levels, remaining robust against decoherence during propagation. Our results offer an approach to using non-Hermitian symmetries to address central challenges in quantum technologies.

ScienceVol. 387(6741)
University of Central Florida (US), University of Southern California (US), Pennsylvania State University (US), University of Rostock (DE), Saint Louis University (US)
Openalex Percentile: Top 1%
Quantum Mechanics and Non-Hermitian Physics
17.45
DOIOpen Access PDFOpenAlex
AI Navigator

Ask Laika to Summarize, Analyze, and Connect papers live on the map.

Summarize Papers & Methodologies

Extract key findings, datasets, and comparative methods across publications.

Benchmark Rankings & Visual Analytics

Rank top research institutions, authors, funders, topics, and journals by Field-Weighted Citation Impact (FWCI) and paper volume with instant charts.

Connect Distant Disciplines

Bridge topological clusters on the map to find hidden collaborative intersections.