Andrew White from the quantum technology laboratory at the University of Queensland, Australia, maintains an excellent web page listing conferences related to quantum technology around the world.   You can find his most recent listing for 2021 conferences here.

Harrisburg University maintains a web page called Quantumapalooza which provides a listing of free online learning opportunities for the Quantum Computing community.

In addition to the conferences shown on the list mentioned above, here are some additional conferences:

The Second International Workshop on Programming Languages for Quantum Computing (PLanQC 2021), co-located with PLDI 2021 with be held as a virtual event on June 20-25, 2021. The workshop aims to bring together researchers from the fields of programming languages and quantum information, exposing the programming languages community to the unique challenges of programming quantum computers. It will promote the development of tools to assist in the process of programming quantum computers, both those that exist today and those likely to exist in the near to far future.

The tenth Adiabatic Quantum Computing Conferences (AQC) 2021 will be held as a virtual conference on June 22-25, 2021 (Japan time) hosted by the Tokyo Institute of Technology. The conferences brings together researchers from different communities to explore the adiabatic and quantum annealing computational methods and related topics. The goal of the conference is to promote a dialogue on the challenges that must be overcome to realize practically useful quantum annealing in existing and near-term hardware.

The 3rd Annual International Quantum Information Science Workshop hosted by the Innovare Advancement Center will be held as an online conference on June 22-24, 2021. The event will include keynotes from leading experts in the field, daily panel discussions exploring research experiences from the different pathways in working with government entities, updated highlights from the winners of last year’s Million Dollar International Quantum-U Tech Accelerator grants and presentations about quantum information science and partnership opportunities from Air Force Research Laboratory (AFRL), Air Force Office of Scientific Research (AFOSR), Army Research Office (ARO), Army Research Laboratory (ARL), Naval Research Laboratory (NRL), and Office of Naval Research (ONR).

A Women in Quantum, Seoul, South Korea event will take place on Sunday night June 27 in the US or Monday morning June 28 in Asia/Australia. It will include presentations and panel sessions to share the activities and experiences of women and engineers who are active in quantum information science in Korea and outside.

Microsoft will hold an Azure Quantum Developers Workshop 3 on June 30, 2021. The workshop will provide updates on the Azure Quantum ecosystem, explore a workflow for developing and running algorithms on today’s quantum hardware with Azure Quantum, and hear from Microsoft’s hardware partner IonQ about recent updates and use cases.

The 16th annual Theory of Quantum Computation, Communication and Cryptography Conference (TQC 2021) will be held on July 5-8, 2021 as a virtual conference. It is a leading annual international conference for students and researchers working in the theoretical aspects of quantum information science. The scientific objective is to bring together the theoretical quantum information science community to present and discuss the latest advances in the field. This year’s conference will be hosted by the University of Latvia.

The 2nd International Workshop on Quantum Computing: Circuits Systems Automation and Applications (QC-CSAA) will be held in conjunction with the ISVLSI 2021 Conference in Tampa, Florida on July 7-9, 2021. The workshop will provide a comprehensive review on fundamentals as well as the current state of the art in research and technology. Its purpose is to explore design paradigms of quantum computing including developing a full stack from quantum algorithms to quantum chip. Advances in quantum computing hardware, software, and algorithms as well as contributions on the transformative research needed to guide quantum computing performance toward practical and sustainable operations will be aligned with the goal of this workshop. Further, circuits and systems targeting novel and existing applications of quantum computing to fields such as quantum chemistry, linear algebra, scientific applications, aerospace, material science, cryptography, machine learning, etc. will be of special interest.

The Qiskit Global Summer School is returning with a focus on Quantum Machine Learning from July 12-23, 2021. will feature two weeks of live lectures and hands-on laboratory sessions where students can apply what they’ve learned using Qiskit code using the new Qiskit machine learning application module. Lectures will begin with an introduction to quantum computing and simple quantum algorithms, before diving into the foundations of classical machine learning and understanding how these concepts translate to quantum computing. Students will then learn about and implement state of the art quantum machine learning algorithms on both simulators and hardware. A blog posting describing the summer school can be found here and additional details including a syllabus for the course is located here.

The fifth Women in Quantum virtual summit will take place on July 19-20, 2021. It will feature more than one dozen noted speakers and panelists and include a unique career fair that will pair employers in the emerging quantum industry with women desiring or progressing in careers in quantum computing.

Google will be holding their Quantum Summer Symposium (QSS) as a virtual event on July 21-22, 2021. This is Google Quantum AI’s annual conference and brings together experts in academia, industry and government to discuss progress in quantum computing research.

The Quantum Computing Summit London organized by Informa Tech will occur on September 22-23, 2021. The conference will be co-located with The AI Summit, has been designed to provide business, and technical insight, qualified via application-based quantum experiences to showcase how quantum is delivering real business value.

Quantum.Tech 2021 will be held as a virtual conference on September 30, 2021. The conference will cover the commercial applications of quantum computing, communications, and sensing.

The Quantum Partnerships Forum will be held in London, UK (or virtually, if a live event isn’t possible) on October 1, 2021. It will focus on creating and growing key partnerships within the quantum computing ecosystem and center around the themes of commercialization and supply chain. The forum will bring together researchers, hardware & systems builders, and equipment manufacturers to discuss design & engineering challenges, technical requirements, and case studies of successful industry partnerships. Similar to an ‘exchange’ format, forum attendees are expected to fill out profiles in order to increase the effectiveness of networking. The structure and content of the event emphasizes networking and the formation and dynamics of partnerships over product pitches, updates, and industry timelines.

D-Wave will be hosting its annual Qubits 2021 Conference as a virtual event on October 5-7, 2021. The conference will feature speakers presenting their latest work on quantum applications in manufacturing/logistics, financial services, biotech/pharma, materials science, healthcare, machine learning, and more. It will include educational sessions for developers who are new to quantum and as well as those folks with lots of experience. Speakers from D-Wave will discuss their quantum roadmap and the latest development tools.

The IEEE Quantum Week 2021 will return on October 18-22, 2021 as a virtual conference. The event is a multidisciplinary quantum computing and engineering venue that gives attendees the unique opportunity to discuss challenges and opportunities with quantum researchers, scientists, engineers, entrepreneurs, developers, students, practitioners, educators, programmers, and newcomers. IEEE Quantum Week aims to showcase quantum research, practice, applications, education, and training including programming systems, software engineering methods & tools, algorithms, benchmarks & performance metrics, hardware engineering, architectures, & topologies, software infrastructure, hybrid quantum-classical computing, architectures and algorithms, as well as many applications including simulation of chemical, physical and biological systems, optimization problems, techniques and solutions, and quantum machine learning.

The Inside Quantum Technology (IQT) Fall Conference will be held as a hybrid conference, both in-person and online, in New York City on November 1-5, 2021. Additional details will be posted they they are available.

The Quantum Computing Summit Silicon Valley organized by Informa Tech will occur on November 3-4, 2021. It will run alongside the AI Summit has been designed to provide business, technical, research, academic and innovation insight, qualified via application-based quantum experiences to showcase how quantum is delivering real business value, drive process efficiency and cost optimisation.

The Second European Quantum Technology Conference (EQTC) has been postponed until November 29, 2021 to December 3, 2021 but will still be held in Dublin, Ireland.  This will be a follow-on to the first EQTC conference held in Grenoble, France in 2019. EQTC 2021 will provide full coverage of the most prominent and recent advances in European and International quantum technology activities across basic sciences, communication, computing, simulation and sensing/metrology. The conference program addresses a wide range of topics in quantum technologies including fundamental science, infrastructure development, industry engagements, education & training, encouraging and facilitating gender balance in the quantum community, international cooperation, and policy-making. It will provide a forum to highlight the state-of-the-art in quantum technologies both in Europe and from around the world.

The fifth annual Q2B Conference will take place as an in-person conference on December 7-9. 2021 in San Jose, California. The event emphasizes practical quantum computing and allows end users, hardware developers, software developers, and others to interact with world-class speakers to discuss the future of quantum computing.