Quantum entanglement Archives - IEEE Transactions on Quantum Engineering

Impact of High-Brightness Entangled Photon Pairs on CHSH Inequality Experiment

March 30, 2026Jin-Woo Kim, Heonoh Kim, June Koo Kevin RheeOpen AccessAttenuation, Brightness, Correlation, Detectors, Mathematical models, Photonics, Quantum entanglement, Quantum mechanics, Satellites, Standards

Abstract: Verifying the violation of Bell’s inequality is one of the most representative methods to demonstrate that entangled photon pairs prepared in a quantum optics-based system exhibit quantum properties. While experiments on Bell inequality violations have been theoretically well-established and extensively conducted to implement various quantum information technologies in laboratory settings, mathematical modeling for systematically […]

InterQnet: A Heterogeneous Full-Stack Approach to Co-designing Scalable Quantum Networks

March 18, 2026Joaquin Chung, Daniel Dilley, Ely Eastman, Alvin Gonzales, Kara Hokenstad, Md Shariful Islam, Varun Jorapur, Joseph Petrullo, Andy C. Y. Li, Bikun Li, Vasileios Niaouris, Anirudh Ramesh, Ansh Singal, Zeyu Ye, Caitao Zhan, Michael Bishof, Eric Chitambar, Jacob P. Covey, Alan Dibos, Xu Han, Liang Jiang, Prem Kumar, Jeffrey Larson, Zain H. Saleem, Rajkumar KettimuthuEarly Access, Quantum InternetHardware, Optical fiber devices, Optical fiber networks, Optical fiber polarization, Optical fiber theory, Protocols, Quantum entanglement, Quantum repeaters, Repeaters, Scalability

Abstract: Quantum communications have progressed significantly, moving from a theoretical concept to small-scale experiments to recent metropolitan-scale demonstrations. As the technology matures, it is expected to revolutionize quantum computing in much the same way that classical networks revolutionized classical computing. Quantum communications will also enable breakthroughs in quantum sensing, metrology, and other areas. However, scalability […]

Parallel Variational Quantum Algorithms With Gradient-Informed Restart to Speed Up Optimization in the Presence of Barren Plateaus

February 10, 2026Daniel Mastropietro, Georgios Korpas, Vyacheslav Kungurtsev, Jakub MarecekQuantum SoftwareApproximation algorithms, Cost function, Markov processes, Neural networks, Noise, Noise measurement, Quantum algorithm, Quantum circuit, Quantum entanglement, Simulated annealing

Abstract: Inspired by the Fleming–Viot stochastic process, we propose a parallel implementation with restart of variational quantum algorithms, with the aim of reducing the time spent by the algorithm in barren plateaus where the optimization direction is unclear. In the Fleming–Viot tradition, parallel searches are called particles. In the proposed approach, the search by a […]

Realistic Quantum Network Simulation for Experimental BBM92 Key Distribution

February 9, 2026Michelle Chalupnik, Brian Doolittle, Suparna Seshadri, Eric G. Brown, Keith Kenemer, Daniel Winton, Daniel Sanchez-Rosales, Matthew Skrzypczyk, Cara Alexander, Eric Ostby, Michael CubedduQuantum InternetDetectors, Discrete event simulation, Encryption, Measurement by laser beam, Optical fiber networks, Photonics, Protocols, Quantum entanglement, Quantum networks, Qubit

Abstract: Quantum key distribution (QKD) can provide secure key material between two parties without relying on assumptions about the computational power of an eavesdropper. QKD is performed over quantum links and quantum networks, systems which are resource-intensive to deploy and maintain. To evaluate and optimize performance prior to, during, and after deployment, accurate simulations with […]

Bridging All-Photonic and Memory-Based Quantum Repeaters

January 12, 2026Naphan Benchasattabuse, Michal Hajdušek, Rodney Van MeterQuantum InternetArchitecture, Logic gates, Memory management, Photonics, Protocols, Quantum entanglement, Quantum repeaters, Quantum state, Qubit, Repeaters

Abstract: The all-photonic quantum repeater scheme based on repeater graph states (RGSs) offers a promising approach for constructing quantum networks without relying on long-coherence-time quantum memories, which remain a significant technological challenge. Despite substantial progress in defining new schemes for generating RGSs, and in analyzing their performance for the task of secret key generation, the […]

A Graphical Rule Book for Clifford Manipulations of Stabilizer States

January 12, 2026Ashlesha Patil, Saikat GuhaQuantum ComputingCogeneration, Eigenvalues and eigenfunctions, Generators, Logic gates, Quantum entanglement, Quantum networks, Quantum state, Qubit, Reviews, Rotation measurement

Abstract: Stabilizer states, along with Clifford manipulations (unitary transformations and measurements) thereof—despite being efficiently simulable on a classical computer—are an important tool in quantum information processing, with applications to quantum computing, error correction, and networking. Graph states, defined on a graph, are a special class of stabilizer states that are central to measurement-based quantum computing, […]

A Sparse-Event Simulation Engine to Model Coincidence-Based Ranging Architectures in Quantum Lidar

December 31, 2025Marco Passafiume Raviraj Adve Boniface Yogendran Bhashyam BalajiQuantum EngineeringBackscatter, Correlation, Engines, Jitter, Laser radar, Noise, Optical waveguides, Photonics, Quantum entanglement, Quantum radar

Abstract: Nonclassical radar and lidar systems have received substantial interest recently; however, although many experimental demonstrations have provided deep physical knowledge of such systems, there remains a lack of effective system models to obtain fundamental metrics such as range resolution as a function of system parameters. This work introduces a high-fidelity simulation platform to mimic […]

Quantum Error Correction for Second-Generation Quantum Repeaters

December 31, 2025Dawei Jiao, Mahdi Bayanifar, Alexei Ashikhmin, Olav TirkkonenQuantum InternetCodes, Error correction codes, Generators, Logic gates, Purification, Quantum entanglement, Quantum repeaters, Qubit, Repeaters, Vectors

Abstract: In this article, we consider second-generation (2G) quantum repeaters (QRs) for creating long-distance entanglement in quantum networks. Combining a distance-dependent depolarizing error model with the nonlocal Bell state purification procedure required by 2G QRs leads to an error model consisting of correlated and biased errors. To correct correlated errors, nonsymmetric Calderbank–Steane–Shor (CSS) codes with […]

On-Demand Resource Allocation for a Quantum Network Hub

December 9, 2025Scarlett Gauthier, Thirupathaiah Vasantam, Gayane VardoyanQuantum InternetCalibration, Hardware, Numerical models, Optical switches, Photonics, Quantum entanglement, Quantum networks, Qubit, Resource management, Telephone sets

Abstract: To effectively support the execution of quantum network applications for multiple sets of user-controlled quantum nodes, a quantum network must efficiently allocate shared resources. We study traffic models for a type of quantum network hub called an entanglement generation switch (EGS), a device that allocates resources to enable entanglement generation between nodes in response […]

Optimal Control-Assisted Rapid Quantum State Transfer on 1-D Spin Chain

December 8, 2025Kai Zhang, Sen KuangQuantum InternetCouplings, Impurities, Protocols, Quantum entanglement, Quantum state, Qubit, Receivers, Semiconductor device measurement, Teleportation, Temperature measurement

Abstract: Traditional many-body teleportation relies on the strong interaction property of a quantum many-body system, which usually requires numerous qubits and entanglement resources, making it difficult to realize experimentally. A natural scheme is to use a 1-D spin chain with simple structure to realize many-body teleportation. In this article, we analyze the conditions for general […]