IEEE Transactions on Quantum Engineering

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 […]

Cryogenic Floating-Gate CMOS Circuits for Quantum Control

March 23, 2021Jennifer Hasler; Neil Dick; Kushal Das; Brian Degnan; Alireza Moini; David ReillyOpen Access, Quantum InformationCapacitors, Cryogenics, Current measurement, Integrated circuits, Nonvolatile memory, Transistors, Tunneling

Voltage biases are often required to bias Qubits, and yet applying a static bias requires separate chip wires, dramatically increasing the system complexity. An ideal approach would be having a nonvolatile digital or analog memory to avoid these issues. This article shows floating-gate (FG) structures could be used to set and forget potentials and tunnel […]

Exploiting Symmetry Reduces the Cost of Training QAOA

March 17, 2021Ruslan Shaydulin; Stefan M. WildOpen Access, Quantum Information, Quantum SoftwareApproximation algorithms, Hardware, Linear programming, Optimization, Qubit, Tensors, Training

A promising approach to the practical application of the quantum approximate optimization algorithm (QAOA) is finding QAOA parameters classically in simulation and sampling the solutions from QAOA with optimized parameters on a quantum computer. Doing so requires repeated evaluations of QAOA energy in simulation. In this article, we propose a novel approach for accelerating the […]

Rydberg Atom Electric Field Sensors for Communications and Sensing

March 10, 2021Charles T. Fancher; David R. Scherer; Marc C. St. John; Bonnie L. Schmittberger MarlowOpen Access, Quantum InformationAtom optics, Atomic beams, Atomic measurements, Optical sensors, Probes, Radio frequency, Sensor phenomena and characterization

Rydberg atom electric field sensors are projected to enable novel capabilities for resilient communications and sensing. This quantum sensor is small-size, highly sensitive, and broadly tunable, and it has the potential for performing precision vector electric field and angle-of-arrival measurements. While these atomic electric field sensors will not replace traditional receivers in commodity applications for […]

Quantum Algorithms for Mixed Binary Optimization Applied to Transaction Settlement

March 3, 2021Lee Braine; Daniel J. Egger; Jennifer Glick; Stefan WoernerOpen Access, Quantum Computer Architecture, Quantum Information, Quantum SoftwareApproximation algorithms, Computers, Hardware, Optimization, Quantum algorithm, Quantum computing, Security

In this article, we extend variational quantum optimization algorithms for quadratic unconstrained binary optimization problems to the class of mixed binary optimization problems. This allows us to combine binary decision variables with continuous decision variables, which, for instance, enables the modeling of inequality constraints via slack variables. We propose two heuristics and introduce the transaction […]

Variational Learning for Quantum Artificial Neural Networks

February 26, 2021Francesco Tacchino; Stefano Mangini; Panagiotis Kl. Barkoutsos; Chiara Macchiavello; Dario Gerace; Ivano Tavernelli; Daniele BajoniOpen Access, Quantum InformationBiological neural networks, Encoding, Logic gates, Machine learning, Neurons, Quantum computing, Qubit

In the past few years, quantum computing and machine learning fostered rapid developments in their respective areas of application, introducing new perspectives on how information processing systems can be realized and programmed. The rapidly growing field of quantum machine learning aims at bringing together these two ongoing revolutions. Here, we first review a series of […]

Distributed Quantum Computing and Network Control for Accelerated VQE

February 9, 2021Stephen DiAdamo; Marco Ghibaudi; James CruiseOpen Access, Quantum Computer Architecture, Quantum InformationComputers, Control systems, Hardware, Logic gates, Quantum algorithm, Quantum computing, Qubit

Interconnecting small quantum computers will be essential in the future for creating large-scale, robust quantum computers. Methods for distributing monolithic quantum algorithms efficiently are, thus, needed. In this article, we consider an approach for distributing the accelerated variational quantum eigensolver algorithm over arbitrary sized—in terms of number of qubits—distributed quantum computers. We consider approaches for […]

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 […]

Quantum Engineering With Hybrid Magnonic Systems and Materials (Invited Paper)

February 8, 2021David D. Awschalom; Chunhui Rita Du; Rui He; F. Joseph Heremans; Axel Hoffmann; Justin Hou; Hidekazu Kurebayashi; Yi Li; Luqiao Liu; Valentine Novosad; Joseph Sklenar; Sean E. Sullivan; Dali Sun; Hong Tang; Vasyl Tyberkevych; Cody Trevillian; Adam W. Tsen; Leah R. Weiss; Wei Zhang; Xufeng Zhang; Liuyan Zhao; Ch. W. Zollitsch.Open Access, Quantum Computer Architecture, Quantum InformationCouplings, Magnetic resonance, Magnetoacoustic effects, Optical sensors, Resonators, Superconducting magnets, Superconducting microwave devices

Quantum technology has made tremendous strides over the past two decades with remarkable advances in materials engineering, circuit design, and dynamic operation. In particular, the integration of different quantum modules has benefited from hybrid quantum systems, which provide an important pathway for harnessing different natural advantages of complementary quantum systems and for engineering new functionalities. […]

Hybrid Dissipative and Dispersive Optomechanically Induced Transparency

February 3, 2021Yong-Pan Gao; Daquan Yang; Peng-Fei Lu; Chuan WangOpen Access, Quantum InformationCouplings, Dispersion, Optical coupling, Optical imaging, Optical pumping, Optical resonators, Photonics

Traditionally, the optical interference and energy conversion could be modulated by dissipation and dispersion in nonlinear optomechanical systems. Here, in this article, we study the enhancement of dissipative coupling on transparency under generalized optomechanical coupling and theoretically illustrate the generation of optomechanically induced transparency with gain and interference tuning. It enables the enhancement of the […]