Open Access Archives - Page 6 of 15 - IEEE Transactions on Quantum Engineering

A High-Resolution Single-Photon Arrival-Time Measurement With Self-Antithetic Variance Reduction in Quantum Applications: Theoretical Analysis and Performance Estimation

November 2, 2022Tony WuEnabling Technologies, Open AccessClocks, Generators, Photonics, Quantum state, Random variables, Single-photon avalanche diodes, Voltage control

An almost all-digital time-to-digital converter (TDC) possessing subpicosecond resolutions, scalable dynamic ranges, high linearity, high noise immunity, and moderate conversion rates can be achieved by a random sampling-and-averaging (RSA) approach with the self-antithetic variance reduction (SAVR) technique for time-correlated single-photon counting (TCSPC) quantum measurements. This article presents detailed theoretical analysis and behavior-model verifications of the […]

Versatile and Concurrent FPGA-Based Architecture for Practical Quantum Communication Systems

November 2, 2022Andrea StancoOpen Access, Special Section on Classical Control SystemsComputer architecture, Field programmable gate arrays, Optical transmitters, Quantum system, Receivers, Security, Standards

This article presents a hardware and software architecture, which can be used in those systems that implement practical quantum key distribution (QKD) and quantum random-number generation (QRNG) schemes. This architecture fully exploits the capability of a System on a Chip (SoC), which comprehends both a field-programmable gate array (FPGA) and a dual-core CPU unit. By […]

Timing Constraints Imposed by Classical Digital Control Systems on Photonic Implementations of Measurement-Based Quantum Computing

November 2, 2022John R. ScottOpen Access, Special Section on Classical Control SystemsComputer architecture, Control systems, Logic gates, Photonics, Quantum computing, Qubit, Timing

Most of the architectural research on photonic implementations of measurement-based quantum computing (MBQC) has focused on the quantum resources involved in the problem with the implicit assumption that these will provide the main constraints on system scaling. However, the “flying-qubit” architecture of photonic MBQC requires specific timing constraints that need to be met by the […]

Development of an Undergraduate Quantum Engineering Degree

November 2, 2022Andrew S. DzurakOpen Access, Quantum EngineeringComputers, Electrical engineering, Industries, Mathematics, Matrices, Quantum computing, Quantum mechanics

Quantum computing, communications, sensing, and simulations are radically transformative technologies, with great potential to impact industries and economies. Worldwide, national governments, industries, and universities are moving to create a new class of workforce—the Quantum Engineers. Demand for such engineers is predicted to be in the tens of thousands within a five-year timescale, far exceeding the […]

Hybrid Classical-Quantum Optimization Techniques for Solving Mixed-Integer Programming Problems in Production Scheduling

June 29, 2022Akshay Ajagekar; Kumail Al Hamoud; Fengqi YouOpen Access, Quantum InformationAnnealing, Computers, Job shop scheduling, Optimal scheduling, Processor scheduling, Quantum annealing, Qubit

Quantum computing (QC) holds great promise to open up a new era of computing and has been receiving significant attention recently. To overcome the performance limitations of near-term QC, utilizing the current quantum computers to complement classical techniques for solving real-world problems is of utmost importance. In this article, we develop QC-based solution strategies that […]

Quantum Volume in Practice: What Users Can Expect From NISQ Devices

June 23, 2022Elijah Pelofske; Andreas Bärtschi; Stephan EidenbenzOpen Access, Quantum InformationBenchmark testing, Computers, Error analysis, Logic gates, Measurement, Optimization, Qubit

Quantum volume (QV) has become the de-facto standard benchmark to quantify the capability of noisy intermediate-scale quantum (NISQ) devices. While QV values are often reported by NISQ providers for their systems, we perform our own series of QV calculations on 24 NISQ devices currently offered by IBM Q, IonQ, Rigetti, Oxford Quantum Circuits, and Quantinuum […]

Simultaneous Estimation of Parameters and the State of an Optical Parametric Oscillator System

June 23, 2022Qi Yu; Shota Yokoyama; Daoyi Dong; David McManus; Hidehiro YonezawaOpen Access, Quantum InformationEstimation, Filtering, Filtering theory, Kalman filters, Quantum computing, Quantum state, Quantum system

In this article, we consider the filtering problem of an optical parametric oscillator (OPO). The OPO pump power may fluctuate due to environmental disturbances, resulting in uncertainty in the system modeling. Thus, both the state and the unknown parameter may need to be estimated simultaneously. We formulate this problem using a state-space representation of the […]

The Present and Future of Discrete Logarithm Problems on Noisy Quantum Computers

June 16, 2022YOSHINORI AONO; SITONG LIU; TOMOKI TANAKA; SHUMPEI UNO; RODNEY VAN METER; NAOYUKI SHINOHARA; RYO NOJIMAOpen Access, Quantum InformationComputers, Cryptography, Logic gates, Noise level, Quantum circuit, Quantum computing, Qubit

The discrete logarithm problem (DLP) is the basis for several cryptographic primitives. Since Shor’s work, it has been known that the DLP can be solved by combining a polynomial-size quantum circuit and a polynomial-time classical postprocessing algorithm. The theoretical result corresponds the situation where a quantum device working with a medium number of qubits of […]

A Connection-Oriented Entanglement Distribution Design in Quantum Networks

May 20, 2022Jian Li; Qidong Jia; Kaiping Xue; David S. L. Wei; Nenghai YuOpen Access, Quantum InformationProtocols, Quality of service, Quantum entanglement, Quantum networks, Qubit, Routing, Teleportation

Quantum networks create a completely new way for communication, and the most important function of a quantum network is to generate long-distance quantum entanglement to serve a number of quantum applications. As the scale of the network expands, in order to establish end-to-end entanglement between two remote nodes, entangled pairs need to be generated and […]

Timing Constraints Imposed by Classical Digital Control Systems on Photonic Implementations of Measurement-Based Quantum Computing

May 19, 2022John R. Scott; Krishna C. BalramOpen Access, Quantum InformationComputer architecture, Control systems, Logic gates, Photonics, Quantum computing, Qubit, Timing