Computer architecture Archives - Page 2 of 2 - IEEE Transactions on Quantum Engineering

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

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 […]

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

January 27, 2022Andrea Stanco; Francesco B. L. Santagiustina; Luca Calderaro; Marco Avesani; Tommaso Bertapelle; Daniele Dequal; Giuseppe Vallone; Paolo VilloresiOpen Access, Quantum Computer Architecture, Quantum InformationComputer 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 […]

Quantum Circuit Architecture Optimization for Variational Quantum Eigensolver via Monto Carlo Tree Search

October 11, 2021Fan-Xu Meng; Ze-Tong Li; Xu-Tao Yu; Zai-Chen ZhangOpen Access, Quantum Computer Architecture, Quantum InformationComputer architecture, Costs, Logic gates, Optimization, Quantum circuit, Qubit, Training

The advent of noisy intermediate-scale quantum (NISQ) devices provide crucial promise for the development of quantum algorithms. Variational quantum algorithms have emerged as one of the best hopes to utilize NISQ devices. Among these is the famous variational quantum eigensolver (VQE), where one trains a parameterized and fixed quantum circuit (or an ansatz) to accomplish […]

Survey on Quantum Circuit Compilation for Noisy Intermediate-Scale Quantum Computers: Artificial Intelligence to Heuristics

March 23, 2021Janusz Kusyk; Samah M. Saeed; Muharrem Umit UyarOpen Access, Quantum SoftwareArtificial intelligence, Computer architecture, Computers, Hardware, Logic gates, Quantum circuit, Qubit

Computationally expensive applications, including machine learning, chemical simulations, and financial modeling, are promising candidates for noisy intermediate scale quantum (NISQ) computers. In these problems, one important challenge is mapping a quantum circuit onto NISQ hardware while satisfying physical constraints of an underlying quantum architecture. Quantum circuit compilation (QCC) aims to generate feasible mappings such that […]

On the Stochastic Analysis of a Quantum Entanglement Distribution Switch

February 9, 2021Gayane Vardoyan; Saikat Guha; Philippe Nain; Don TowsleyOpen Access, Quantum Computer Architecture, Quantum InformationAnalytical models, Computer architecture, Numerical models, Quantum entanglement, Qubit, Repeaters, Switches

In this article, we study a quantum entanglement distribution switch that serves k users in a star topology. We model variants of the system as continuous-time Markov chains and obtain expressions for switch capacity, expected number of qubits stored in memory at the switch, and the quantum memory occupancy distribution. We obtain a number of analytic results […]

Compiler Design for Distributed Quantum Computing

January 22, 2021Davide Ferrari; Angela Sara Cacciapuoti; Michele Amoretti; Marcello CaleffiOpen Access, Quantum Computer Architecture, Quantum InformationComputer architecture, Integrated circuit modeling, Logic gates, Quantum circuit, Quantum computing, Qubit, Task analysis

In distributed quantum computing architectures, with the network and communications functionalities provided by the Quantum Internet, remote quantum processing units can communicate and cooperate for executing computational tasks that single, noisy, intermediate-scale quantum devices cannot handle by themselves. To this aim, distributed quantum computing requires a new generation of quantum compilers, for mapping any quantum […]

Encoding of Nonbinary Entanglement-Unassisted and Assisted Stabilizer Codes

January 12, 2021Priya J. Nadkarni; Shayan Srinivasa GaraniOpen Access, Quantum InformationComputer architecture, Encoding, Generators, Quantum entanglement, Quantum state, Quantum system, Tensors

Quantum coding schemes over qudits using preshared entanglement between the encoder and decoder can provide better error correction capability than without it. In this article, we develop procedures for constructing encoding operators for entanglement-unassisted and entanglement-assisted qudit stabilizer codes over Fpk, with p prime and k≥1 from first principles, generalizing prior works on qubit-based codes and codes that work […]

Preparing Dicke States on a Quantum Computer

December 1, 2020Chandra Sekhar Mukherjee; Subhamoy Maitra; Vineet Gaurav; Dibyendu RoyOpen Access, Quantum Computer Architecture, Quantum InformationComputer architecture, Logic gates, Matrix decomposition, Noise measurement, Qubit, Task analysis, Tutorials

Exact requirement of controlled NOT (CNOT) and single-qubit gates to implement a quantum algorithm in a given architecture is one of the central problems in this computational paradigm. In this article, we take a tutorial approach in explaining the preparation of Dicke states (|D k n 〉) using concise realizations of partially defined unitary transformations. We show how […]

Quantum Computer Architecture Toward Full-Stack Quantum Accelerators

April 22, 2020Koen Bertels; A. Sarkar; T. Hubregtsen; M. Serrao; A.A. Mouedenne; A. Yadav; A. Krol; I. Ashraf; C. Garcia AlmudeverOpen Access, Quantum Computer Architecture, Quantum InformationAcceleration, Computer architecture, Ion accelerators, Logic gates, Process control, Qubit

This article presents the definition and implementation of a quantum computer architecture to enable creating a new computational device-a quantum computer as an accelerator. A key question addressed is what such a quantum computer is and how it relates to the classical processor that controls the entire execution process. In this article, we present explicitly […]

Enhancing a Near-Term Quantum Accelerator’s Instruction Set Architecture for Materials Science Applications

January 28, 2020Xiang Zou, Shavindra P. Premaratne, M. Adriaan Rol, Sonika Johri, Viacheslav Ostroukh, David J. Michalak, Roman Caudillo, James S. Clarke, Leonardo DiCarlo, A. Y. MatsuuraOpen AccessComputational modeling, Computer architecture, Heuristic algorithms, Instruction sets, Logic gates, Qubit

Quantum computers with tens to hundreds of noisy qubits are being developed today. To be useful for real-world applications, we believe that these near-term systems cannot simply be scaled-down non-error-corrected versions of future fault-tolerant large-scale quantum computers. These near-term systems require specific architecture and design attributes to realize their full potential. To efficiently execute an […]