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:1002.1920 · Nature Physics

Quantum memory for entangled continuous-variable states

Kasper Jensen, Wojciech Wasilewski, Hanna Krauter, T. Fernholz, Bo M. Nielsen, Masaki Owari, Martin Bodo Plenio, Alessio Serafini, Michael M. Wolf, Eugene Simon Polzik

Published Nov 7, 2010• 160 citations
arXivHTMLPDF
DOI
10.1038/nphys1819

Related papers

Quantum memories for continuous variable states of light in atomic ensembles

Gabriel Hu E tet

•Jan 1, 2008•4 citations

Verification of continuous-variable quantum memories

Paolo Abiuso

Abstract A proper quantum memory is argued to consist in a quantum channel which cannot be simulated with a measurement followed by classical information storage and a final state preparation, i.e. with an entanglement breaking (EB) channel. The verification of quantum memories (non-EB channels) is a task in which an honest user wants to test the quantum memory of an untrusted, remote provider. This task is inherently suited for the class of protocols with trusted quantum inputs, sometimes called measurement-device-independent (MDI) protocols. Here, we study the MDI certification of non-EB channels in continuous variable (CV) systems. We provide a simple witness based on adversarial metrology, and describe an experimentally friendly protocol that can be used to verify all non Gaussian incompatibility breaking quantum memories. Our results can be tested with current technology and can be applied to test other devices resulting in non-EB channels, such as CV quantum transducers and transmission lines.

arXiv:2305.07513•Quantum Science and Technology•Nov 3, 2023•10 citations

Towards Quantum Memory

Wolfgang Tittel, Mikael Afzelius, Nicolas Gisin +2 more

Bulletin of the American Physical Society•Jun 8, 2007•0 citations

Quantum memory for long-distance and multiphoton entanglement

Philip John Walther

SPIE Newsroom•Jan 1, 2008•0 citations

Deterministically entangling multiple remote quantum memories inside an optical cavity

Zhihui Yan, Yanhong Liu, Jieli Yan +1 more

Quantum memory for the nonclassical state of light and entanglement among multiple remote quantum nodes hold promise for a large-scale quantum network, however, continuous-variable (CV) memory efficiency and entangled degree are limited due to imperfect implementation. Here we propose a scheme to deterministically entangle multiple distant atomic ensembles based on CV cavity-enhanced quantum memory. The memory efficiency can be improved with the help of cavity-enhanced electromagnetically induced transparency dynamics. A high degree of entanglement among multiple atomic ensembles can be obtained by mapping the quantum state from multiple entangled optical modes into a collection of atomic spin waves inside optical cavities. Besides being of interest in terms of unconditional entanglement among multiple macroscopic objects, our scheme paves the way towards the practical application of quantum networks.

Physical Review A•Jan 31, 2018•8 citations

Entangled coherent states for quantum information processing

Syed Hamad Bukhari, Samia Aslam, Faiza Mustafa +3 more

Optik•Jun 23, 2014•7 citations
Abstract A proper quantum memory is argued to consist in a quantum channel which cannot be simulated with a measurement followed by classical information storage and a final state preparation, i.e. with an entanglement breaking (EB) channel. The verification of quantum memories (non-EB channels) is a task in which an honest user wants to test the quantum memory of an untrusted, remote provider. This task is inherently suited for the class of protocols with trusted quantum inputs, sometimes called measurement-device-independent (MDI) protocols. Here, we study the MDI certification of non-EB channels in continuous variable (CV) systems. We provide a simple witness based on adversarial metrology, and describe an experimentally friendly protocol that can be used to verify all non Gaussian incompatibility breaking quantum memories. Our results can be tested with current technology and can be applied to test other devices resulting in non-EB channels, such as CV quantum transducers and transmission lines.
Quantum memory for the nonclassical state of light and entanglement among multiple remote quantum nodes hold promise for a large-scale quantum network, however, continuous-variable (CV) memory efficiency and entangled degree are limited due to imperfect implementation. Here we propose a scheme to deterministically entangle multiple distant atomic ensembles based on CV cavity-enhanced quantum memory. The memory efficiency can be improved with the help of cavity-enhanced electromagnetically induced transparency dynamics. A high degree of entanglement among multiple atomic ensembles can be obtained by mapping the quantum state from multiple entangled optical modes into a collection of atomic spin waves inside optical cavities. Besides being of interest in terms of unconditional entanglement among multiple macroscopic objects, our scheme paves the way towards the practical application of quantum networks.