Transmon qubits are among the most widely implemented designs in quantum computing, and their description primarily relies on technical terminology from physics—concepts that are not typically studied in engineering disciplines. Based on the premise that advancing this field requires contributions from both physics and engineering backgrounds, this article offers an accessible introduction to the operation of transmon qubits.
Transmon qubits are among the most widely implemented designs in quantum computing, and their description primarily relies on technical terminology from physics—concepts that are not typically studied in engineering disciplines. Based on the premise that advancing this field requires contributions from both physics and engineering backgrounds, this article offers an accessible introduction to the operation of transmon qubits.
In this research, we explore the operation of the transmon qubit, a key superconducting architecture in quantum computing. To do so, we address fundamental concepts such as the quantum anharmonic oscillator, Cooper pairs, quantum tunneling, Josephson junctions (JJ), SQUID devices, and the Cooper pair box. The purpose is to provide a rigorous yet accessible introduction, specifically aimed at engineering professionals, that explains the operational principles of the transmon without requiring advanced knowledge of theoretical physics.
One of the most popular approaches being pursued to achieve a quantum advantage with practical hardware is the use of superconducting circuit devices. Although significant progress has been made over the previous two decades, substantial engineering efforts are required to scale these devices so they can be used to solve many problems of interest. Unfortunately, much of this exciting field is described using technical jargon and concepts from physics that are unfamiliar to a classically trained electromagnetics engineer. As a result, this work is often difficult for engineers to become engaged in.
Portuguese translation (2026) of the original Spanish presentation "De Bits a Qubits: Una Introducción a Computación Cuántica." This slide deck introduces quantum computing concepts for engineering audiences with no prior quantum background. Topics covered: classical vs. quantum computing, qubits, superposition, quantum gates, and current applications. First presented in Portuguese at the training session "Introdução à Computação Quântica", organized by IEEE Computer Society, Universidade de Brasília (UnB), Brasília, Brazil. February 12, 2026. This presentation has been delivered at multiple conferences and academic events since 2023. Original presentation: "Introducción a la Computación Cuántica Actual", organized by IEEE WIE, IEEE Computer Society, IEEE Robotics & Automation, and IEEE Oceanic Engineering Society at ETITC, Bogotá, Colombia. November 14, 2023. Original version (Spanish, 2023): doi.org/10.5281/zenodo.19157336 License: CC BY-NC-ND 4.0 — Free to share with attribution.Commercial use and modifications require explicit permission.Contact: quantumkaren.com
With the increasing accessibility of quantum computers to the wider population, there is a growing demand for the education and training of a group of quantum programmers. This cohort predominantly consists of individuals who have primarily focused on the development of classical computer programs throughout their professional careers. Although existing quantum computers currently possess fewer than 100 qubits, it is widely anticipated that the quantum computing hardware will experience significant advancements in terms of qubit quantity, quality, and connectivity. The objective of this review is to elucidate the fundamental principles of quantum programming, which diverge significantly from classical programming. This will be achieved through the utilization of concise algebraic expressions, allowing for an optional comprehension of the captivating underlying principles of quantum mechanics. This paper provides an overview of quantum computing algorithms and their practical implementation on physical quantum hardware. In this study, we undertake a comprehensive examination of various quantum algorithms, with the objective of providing concise and self-contained descriptions for each. In this study, we demonstrate the practical implementation of the aforementioned algorithms on IBM's quantum computer. For each algorithm, we thoroughly analyze and compare the outcomes obtained from the implementation on the quantum computer with those obtained from the simulator. This analysis focuses on identifying and discussing any disparities that arise between the results obtained from the simulator and the actual hardware runs. This article serves as an introduction to quantum algorithms for computer scientists, physicists, and engineers, offering a comprehensive guide for their practical implementation.
Superconducting transmon qubits are a leading technology for quantum information processing, yet their reliable operation rests on meticulous calibration and characterization routines. These processes have been fine-tuned and are relatively well understood by the quantum computing community. Nevertheless, it is often challenging for newcomers to compile all the available information into a practical experimental flow. In this tutorial, we present a comprehensive walkthrough for the characterization and optimization of tunable transmon qubits, demonstrated on a commercial five-qubit processor. Moving beyond theoretical description, we detail in a straightforward manner the complete workflow, from cryogenic setup and wiring to parametric amplifier optimum operation, flux sweet-spot identification, pulse calibration, and readout optimization. We also demonstrate the characterization of qubit-qubit coupling, covering all steps before multiqubit operations. This guide serves as a reference for experimentalists seeking to efficiently bring up transmon-based quantum devices.
Important concepts from the diverse fields of physics, mathematics, engineering and computer science coalesce in this foundational text on the cutting-edge field of quantum information. Designed for undergraduate and graduate students with any STEM background, and written by a highly experienced author team, this textbook draws on quantum mechanics, number theory, computer science technologies, and more, to delve deeply into learning about qubits, the building blocks of quantum information, and how they are used in quantum computing and quantum algorithms. The pedagogical structure of the chapters features exercises after each section as well as focus boxes, giving students the benefit of additional background and applications without losing sight of the big picture. Recommended further reading and answers to select exercises further support learning. Written in approachable and conversational prose, this text offers a comprehensive treatment of the exciting field of quantum information while remaining accessible to students and researchers within all STEM disciplines.