Perspectives on Quantum Technologies - Modeling, Simulation, and Implementation

Alto Osada, Rekishu Yamazaki, Atsushi Noguchi

Eric Sakk

Quantum technologies are constantly influencing fields such as computation, communications, sensing, and energy systems. Perspectives on Quantum Technologies - Modeling, Simulation, and Implementation offers a comprehensive treatment of how quantum designs are conceptualized, modeled, and translated into practical devices. This volume highlights the roles of entanglement and symmetry, explores quantum-inspired modeling and dynamical simulation approaches, and examines enabling hardware technologies in emerging quantum applications. By linking conceptual foundations to computational methods and hardware realization, this book offers an in-depth survey of the quantum technology landscape. It should be of great value to researchers, graduate students, and professionals seeking insight into current directions. Emphasizing both theoretical perspectives and technological relevance, this volume serves as a resource for understanding innovations shaping the next generation of quantum technologies.

Rainer Müller, Franziska Greinert

Douglas D. Hodson, Michael R. Grimaila, Logan O. Mailloux +2 more

This article presents the background, development, and implementation of a simulation framework used to model the quantum exchange aspects of Quantum Key Distribution (QKD) systems. The presentation of our simulation framework is novel from several perspectives, one of which is the lack of published information in this area. QKD is an innovative technology which exploits the laws of quantum mechanics to generate and distribute unconditionally secure cryptographic keys. While QKD offers the promise of unconditionally secure key distribution, real world systems are built from non-ideal components which necessitates the need to understand the impact these non-idealities have on system performance and security. To study these non-idealities we present the development of a quantum communications modeling and simulation capability. This required a suitable mathematical representation of quantum optical pulses and optical component transforms. Furthermore, we discuss how these models are implemented within our Discrete Event Simulation-based framework and show how it is used to study a variety of QKD implementations.

Christopher Mansell

In this thesis, I describe a proposal for experiments with dense ensembles of ultracold Rubidium atoms optically excited to highlying electronic states known as Rydberg states. The proposed experiment is designed to implement a model of quantum computation known as deterministic quantum computation with one qubit (DQC1). My proposal is novel among other proposals for Rydberg atoms because it employs mixed states and could provide insights into the source of the enhancements of quantum technology over classical technology. I demonstrate that ultracold atoms and Rydberg interactions offer new perspectives for exploring the DQC1 model. This is mainly due to the large strength, long range and controllability of Rydberg interactions. My specific contributions include: a proposal that solves one of the main issues with implementing quantum logic gates between ensembles of atoms; numerical simulations of the proposed cold atom implementation of a DQC1 protocol; and the design and laboratory implementation of a high-performance optical system for imaging ultracold atoms. These contributions bring the experimental exploration of the DQC1 model closer to realisation.

János A. Bergou, Mark S. Hillery, Mark E. Saffman