Detectors Archives - IEEE Transactions on Quantum Engineering

Improved BP Decoding with Multiple Error-Path Detection for Topological Quantum Codes

October 2, 2026Jaemin Kim, Hyunwoo Jung, Jeongseok HaEarly Access, Open AccessChromium, Codes, Complexity theory, Copper, Decoding, Detectors, Error analysis, Poles and zeros, Table lookup, Vectors

Abstract: Topological quantum codes are promising candidates for realizing fault-tolerant quantum computing. In this context, belief propagation (BP) decoding is an efficient method for topological codes, offering high error-correction performance with low complexity. However, BP decoding suffers significant performance degradation due to quantum trapping sets (QTSs). Although various decoding schemes have been proposed to mitigate […]

Effect of Nonidealities on Nonlocal Quantum Entanglement Quality as Measured by the CHSH Inequality Violation

September 10, 2026Richard A. Brewster, Julius Goldhar, Mark Morris, Gerald Baumgartner, Yanne K. ChemboEarly Access, Open AccessDetectors, Filtering, Filters, Polarization, Weighted sum model

Abstract: The violation of Bell-like inequalities unambiguously verifies the entanglement of a multipartite quantum state. However, experimental impairments and nonidealities often compromise the entanglement quality, and this degradation translates into a non-maximal violation of these inequalities. We present a detailed analysis of the influence of experimental impairments on the quality of nonlocal polarization entanglement for […]

Entanglement Distribution and Teleportation in Assisted and Scalable Quantum Access Networks

August 11, 2026Amir Mohammad Yaghoobianzadeh, Jawad A. SalehiEarly Access, Open AccessDetectors, Joining processes, Matrices, Modeling, Passive optical networks, Probability, Protocols, Reviews, Teleportation, Textile fibers

Abstract: We have investigated the entanglement distribution and quantum teleportation in quantum passive optical networks (QPONs), where an entangled state is distributed between the central node and multiple end users through lossy fibers and passive optical splitter/combiner. The entanglement degradation is quantified using logarithmic negativity, and teleportation fidelity both in non-assisted and assisted strategies. We […]

Clifford Manipulations of Stabilizer States – Application to Linear Optical Qubits

August 6, 2026Ashlesha Patil, Saikat GuhaEarly Access, Open AccessCircuits, Detectors, Encoding, Hilbert space, Measurement, Polarization, Probability, Quantum circuit, Qubit, Rails

Abstract: The single-photon dual-rail qubit is popular for photonic quantum computing and communications, both due to gates being realizable with linear optics (LO) and photon detection, as well as easy interfaces with matter quantum memories. Two-qubit operations, i.e., two-qubit gates followed by the measurement of one (Type-I fusion) or both (Type-II fusion) qubits, are, however, […]

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 […]

Differential Phase Encoded Plug-and-Play Measurement-Device-Independent Quantum Key Distribution

February 16, 2026Nilesh Sharma, Shashank Kumar Ranu, Prabha Mandayam, Anil PrabhakarQuantum InformationDetectors, Encoding, Frequency modulation, Interference, Laser beams, Mirrors, Phase measurement, Protocols, Quantum key distribution, Security

Abstract: Measurement-device-independent quantum key distribution (MDI-QKD) enhances security by removing vulnerabilities associated with detector side channels. Real-world implementations ofMDI-QKD face practical challenges, such as channel asymmetry and physical imperfections, which degrade the visibility of Hong–Ou–Mandel interference, an essential factor in determining the secure key rate. In this work, we evaluate the performance of differential phase […]

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 […]

Control of a Josephson Digital Phase Detector via an SFQ-Based Flux Bias Driver

June 26, 2025Laura Di Marino; Luigi Di Palma; Michele Riccio; Francesco Fienga; Marco Arzeo; Oleg MukhanovQuantum ComputingDetectors, Integrated circuit modeling, Josephson junctions, Microwave theory and techniques, Noise, Oscillators, Phase detection, Qubit, Superconducting microwave devices, Switches

Abstract: Quantum computation requires high-fidelity qubit readout, preserving the quantum state. In the case of superconductings qubits, readout is typically performed using a complex analog experimental setup operating at room temperature, which poses significant technological and economic barriers to large system scalability. An alternative approach is to perform a cryogenic on-chip qubit readout based on […]

Observing the Poisson Distribution of a Coherent Microwave Field With a Parametric Photon Detector

March 11, 2025Jiaming Wang, Kirill Petrovnin, Pertti J. Hakonen, Gheorghe Sorin ParaoanuQuantum Sensing & MetrologyDetectors, Josephson junctions, Microwave amplifiers, Microwave imaging, Microwave technology, Optical detectors, Photon detectors, Probes, Superconducting microwave devices, Superconducting photodetectors

Abstract: Single-photon detectors are essential for implementing optical quantum technologies, such as quantum key distribution, and for enhancing optical imaging systems such as lidar, while also playing a crucial role in studying the statistical properties of light. In this work, we show how the underlying photon statistics can be revealed by using a threshold detector, […]

Observing the Poisson Distribution of a Coherent Microwave Field With a Parametric Photon Detector

Single-photon detectors are essential for implementing optical quantum technologies, such as quantum key distribution, and for enhancing optical imaging systems such as lidar, while also playing a crucial role in studying the statistical properties of light. In this work, we show how the underlying photon statistics can be revealed by using a threshold detector, implemented […]