IEEE Transactions on Quantum Engineering

Quantum Conformal Prediction for Reliable Uncertainty Quantification in Quantum Machine Learning

November 17, 2023Sangwoo Park, Osvaldo SimeoneQuantum InformationCalibration, Data models, Machine learning, Predictive models, Training, Training data, Uncertainty

Quantum machine learning is a promising programming paradigm for the optimization of quantum algorithms in the current era of noisy intermediate-scale quantum computers. A fundamental challenge in quantum machine learning is generalization, as the designer targets performance under testing conditions while having access only to limited training data. Existing generalization analyses, while identifying important general […]

Multiuser Entanglement Distribution in Quantum Networks Using Multipath Routing

November 2, 2023Evan SutcliffeRegularPerformance evaluation, Protocols, Quantum entanglement, Quantum networks, Qubit, Routing, Topology

Quantum networks facilitate numerous applications including secure communication and distributed quantum computation by performing entanglement distribution. For some multiuser quantum applications, access to a shared multipartite state is required. We consider the problem of designing protocols for distributing such states, at an increased rate. For this, we propose three protocols that leverage multipath routing to […]

A Proposed Quantum Framework for Low-Complexity Quantum Simulation and Spectrum Estimation of Hankel-Patterned Systems

November 1, 2023Mostafizur Rahaman LaskarEnabling TechnologiesComputer architecture, Logic gates, Matrix decomposition, Signal processing, Signal processing algorithms, Sparse matrices, Symmetric matrices

The structured matrix completion problem (SMCP) is ubiquitous in several signal processing applications. In this article, we consider a fixed pattern, namely, the Hankel-structure for the SMCP under quantum formalism. By exploiting its structure, a lower-gate-complexity quantum circuit realization of a Hankel system is demonstrated. Further, we propose a quantum simulation algorithm for the Hankel-structured […]

Quantum Approximate Bayesian Optimization Algorithms With Two Mixers and Uncertainty Quantification

October 25, 2023Jungin E. KimQuantum ComputingApproximation algorithms, Mixers, Optimization, Quantum circuit, Quantum computing, Qubit, Uncertainty

The searching efficiency of the quantum approximate optimization algorithm is dependent on both the classical and quantum sides of the algorithm. Recently, a quantum approximate Bayesian optimization algorithm (QABOA) that includes two mixers was developed, where surrogate-based Bayesian optimization is applied to improve the sampling efficiency of the classical optimizer. A continuous-time quantum walk mixer […]

A Cost and Power Feasibility Analysis of Quantum Annealing for NextG Cellular Wireless Networks

October 23, 2023Srikar KasiQuantum ComputingAnnealing, Base stations, Costs, Power demand, Quantum annealing, Qubit, Spectral efficiency

In order to meet mobile cellular users’ ever-increasing data demands, today’s 4G and 5G wireless networks are designed mainly with the goal of maximizing spectral efficiency. While they have made progress in this regard, controlling the carbon footprint and operational costs of such networks remains a long-standing problem among network designers. This article takes a […]

Scalable QKD Postprocessing System With Reconfigurable Hardware Accelerator

October 19, 2023Natarajan VenkatachalamQuantum InternetData processing, Field programmable gate arrays, Hardware, Protocols, Synchronization, Task analysis, Throughput

Key distillation is an essential component of every quantum key distribution (QKD) system because it compensates for the inherent transmission errors of a quantum channel. However, the interoperability and throughput aspects of the postprocessing components are often neglected. In this article, we propose a high-throughput key distillation framework that supports multiple QKD protocols, implemented in […]

Optimal Control of the Operating Regime of a Single-Electron Double Quantum Dot

October 16, 2023V. ReiherQuantum ComputingLogic gates, Magnetic fields, Optimal control, Pipelines, Quantum dots, Qubit, Silicon

The double-quantum-dot device benefits from the advantages of both the spin and charge qubits, while offering ways to mitigate their drawbacks. Careful gate voltage modulation can grant greater spinlike or chargelike dynamics to the device, yielding long coherence times with the former and high electrical susceptibility with the latter for electrically driven spin rotations or […]

Bayesian Optimization for QAOA

October 16, 2023Simone TibaldiRegularApproximation algorithms, Bayes methods, Optimization, Quantum circuit, Qubit, Task analysis, Training

The quantum approximate optimization algorithm (QAOA) adopts a hybrid quantum-classical approach to find approximate solutions to variational optimization problems. In fact, it relies on a classical subroutine to optimize the parameters of a quantum circuit. In this article, we present a Bayesian optimization procedure to fulfill this optimization task, and we investigate its performance in […]

Continuous-Variable Quantum Secret Sharing in Fast-Fluctuating Channels

October 9, 2023Fangli YangQuantum Networking & CommunicationsChannel estimation, Detectors, Particle measurements, Probability distribution, Protocols, Quantum state, Security

Recently, several continuous-variable quantum secret sharing (CV-QSS) protocols were proposed, while most of them are limited to the fiber channel systems with a relatively stable transmissivity. However, by means of complex channels, the transmissivity fluctuates dramatically in time with a probability distribution, which will lead to a fast-fluctuating attack. Therefore, the security analysis of CV-QSS […]

Thin Film Materials for Room Temperature Quantum Applications

October 6, 2023Farhana AnwarQuantum Sensing & MetrologyAluminum nitride, Diamonds, III-V semiconductor materials, Plasma temperature, Qubit, Surface treatment, Temperature measurement

Thin films with quantum defects are emerging as a potential platform for quantum applications. Quantum defects in some thin films arise due to structural imperfections, such as vacancies or impurities. These defects generate localized electronic states with unique optical and electronic properties. Crystal vacancies or defects that occur when atoms are missing from a crystal […]