Qubit Archives - IEEE Transactions on Quantum Engineering

Optimized Distribution of Entanglement Graph States in Quantum Networks

March 17, 2025Xiaojie Fan, Caitao Zhan, Himanshu Gupta, C. R. RamakrishnanQuantum InternetAtom optics, Fans, Logic gates, Optical devices, Optical network units, Quantum computing, Quantum entanglement, Quantum networks, Qubit, Tree graphs

Building large-scale quantum computers, essential to demonstrating quantum advantage, is a key challenge. Quantum networks can help address this challenge by enabling the construction of large, robust, and more capable quantum computing platforms by connecting smaller quantum computers. Moreover, unlike classical systems, quantum networks can enable fully secured long-distance communication. Thus, quantum networks lie at […]

Explicit Quantum Circuit for Simulating the Advection–Diffusion–Reaction Dynamics

February 21, 2025Claudio Sanavio, Enea Mauri, Sauro SucciQuantum ComputingComputational fluid dynamics, Convergence, Encoding, Logic gates, Logistics, Mathematical models, Polynomials, Quantum algorithm, Quantum circuit, Qubit

We assess the convergence of the Carleman linearization of advection–diffusion–reaction (ADR) equations with a logistic nonlinearity. It is shown that five Carleman iterates provide a satisfactory approximation of the original ADR across a broad range of parameters and strength of nonlinearity. To assess the feasibility of a quantum algorithm based on this linearization, we analyze […]

Qubit Rate Modulation-Based Time Synchronization Mechanism for Multinode Quantum Networks

February 17, 2025Marc JofreQuantum InternetAerospace electronics, Clocks, Frequency synchronization, Protocols, Quantum networks, Qubit, Real-time systems, Synchronization, Time-frequency analysis, Timing

The combination of quantum and telecommunication networks enables to revolutionize the way information is used, offering unparalleled capabilities and making it an ideal choice for many critical applications. In this sense, quantum protocols generally have a unique requirement to have strict time synchronization in order to operate, which generally consume quantum resources of part of […]

Generating Shuttling Procedures for Constrained Silicon Quantum Dot Array

February 14, 2025Naoto Sato, Tomonori Sekiguchi, Takeru Utsugi, Hiroyuki MizunoQuantum SoftwareCrosstalk, Electrons, Large scale integration, Logic gates, Quantum circuit, Quantum dots, Qubit, Silicon, Symbols, Voltage measurement

In silicon quantum computers, a single electron is trapped in a microstructure called a quantum dot, and its spin is used as a qubit. For large-scale integration of qubits, we previously proposed an approach of sharing a control gate in the row or column of a 2-D quantum dot array. In our array, the shuttling […]

Engineering Quantum Error Correction Codes Using Evolutionary Algorithms

February 5, 2025Mark A. Webster, Dan E. BrowneQuantum ComputingCodes, Computational modeling, Computers, Error analysis, Error correction codes, Evolutionary computation, Generators, Qubit, Standards, Vectors

Quantum error correction and the use of quantum error correction codes are likely to be essential for the realization of practical quantum computing. Because the error models of quantum devices vary widely, quantum codes that are tailored for a particular error model may have much better performance. For more about this article see link below. […]

Variational Quantum Algorithms for Differential Equations on a Noisy Quantum Computer

January 20, 2025Niclas Schillo, Andreas SturmQuantum ComputingComputers, Differential equations, Encoding, Hardware, Logic gates, Noise measurement, Quantum algorithm, Quantum cascade lasers, Quantum circuit, Qubit

The role of differential equations (DEs) in science and engineering is of paramount importance, as they provide the mathematical framework for a multitude of natural phenomena. Since quantum computers promise significant advantages over classical computers, quantum algorithms for the solution of DEs have received a lot of attention. Particularly interesting are algorithms that offer advantages […]

Quantum Two-Way Protocol Beyond Superdense Coding: Joint Transfer of Data and Entanglement

January 10, 2025Kristian S. Jensen, Lorenzo Valentini, René B. Christensen, Marco Chiani, Petar PopovskiQuantum InternetEncoding, Metadata, Photonics, Proposals, Protocols, Quantum channels, Quantum entanglement, Qubit, Repeaters, Throughput

In this article, we introduce a generalization of one-way superdense coding to two-way communication protocols for transmitting classical bits by using entangled quantum pairs. The proposed protocol jointly addresses the provision of entangled pairs and superdense coding, introducing an integrated approach for managing entanglement within the communication protocol. To assess the performance of the proposed […]

Benchmarking Quantum Circuit Transformation With QKNOB Circuits

January 8, 2025Sanjiang Li, Xiangzhen Zhou, Yuan FengQuantum SoftwareApproximation algorithms, Benchmark testing, Costs, Logic gates, Performance evaluation, Quantum circuit, Quantum mechanics, Qubit, Scalability, Transforms

Current superconducting quantum devices impose strict connectivity constraints on quantum circuit execution, necessitating circuit transformation before executing quantum circuits on physical hardware. Numerous quantum circuit transformation (QCT) algorithms have been proposed. To enable faithful evaluation of state-of-the-art QCT algorithms, this article introduces qubit mapping benchmark with known near-optimality (QKNOB), a novel benchmark construction method for […]

RSFQ All-Digital Programmable Multitone Generator for Quantum Applications

December 20, 2024João Barbosa, Jack C. Brennan, Alessandro Casaburi, M. D. Hutchings, Alex Kirichenko, Oleg Mukhanov, Martin WeidesEnabling TechnologiesComb filters, Computer architecture, Delays, Generators, Photon detectors, Quantum circuit, Qubit, Scalability, Shift registers, Standards

One of the most important and topical challenges of quantum circuits is their scalability. Rapid single flux quantum (RSFQ) technology is at the forefront of replacing current standard CMOS-based control architectures for a number of applications, including quantum computing and quantum sensor arrays. By condensing the control and readout to single-flux-quantum-based on-chip devices that are […]

Dissipative Variational Quantum Algorithms for Gibbs State Preparation

December 4, 2024Yigal Ilin, Itai AradQuantum ComputingCost function, Hardware, Logic gates, Noise, Quantum algorithm, Quantum circuit, Quantum computing, Qubit, Resilience, Toy manufacturing industry

In recent years, variational quantum algorithms have gained significant attention due to their adaptability and efficiency on near-term quantum hardware. They have shown potential in a variety of tasks, including linear algebra, search problems, Gibbs, and ground state preparation. Nevertheless, the presence of noise in current day quantum hardware severely limits their performance. In this […]