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 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. This fourth Quantum.Tech conference will cover the entire quantum ecosystem; quantum hardware and software, cryptography & communications, sensing, metrology and imaging with a focus on the commercialization of quantum for enterprise solution applications and real-world user case studies.

Keysight World 2021 will be held as a virtual conference on different days depending upon the geographical region between October 5 and October 19, 2021. As part of a track focusing on “Driving the Digital Transformation” there will be a session titled “Pushing the Envelope on Quantum Computing” that will include a panel sessions with authorities from Rigetti, Google, IQC, and Keysight.

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.

Quantum Industry Day in Switzerland 2021 will be held as a virtual conference on October 5-6, 2021. The Quantum Industry Day gathers academic and industrial R&D to foster exchange and accelerate the development of new quantum products. The program covers the areas of quantum computing, quantum sensing, quantum instrumentation and quantum communication.

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. The conference will be a gathering of business leaders, product developers, marketing strategists and investors anywhere in the world focused on quantum technology. Over 1,000 people will be attending this event (both in-person and online) from all over the world and from every area of quantum technology. It will include panels and keynotes on 15 vertical topics critical to those seeking new business revenues from quantum-related opportunities.

The 2021 Chicago Quantum Summit will be held on November 4, 2021. Additional information about this event will be posted when it is 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 Optical Society (OSA) will hold its Quantum Information and Measurement VI as a virtual conference on November 1-5, 2021.  The conference topics will cover the latest in theoretical developments and experimental implementations of quantum information technology, including the advanced engineering needed to realize such technologies. In addition to the conference’s traditional focus on quantum optics and photonics, the QIM conference will also include other platforms for quantum technologies, broadly construed, including topics such as solid-state systems (superconductors, semi-conductors) atoms, and ions (including gravity gradiometers and gyroscopes, and computing and simulation engines).

Quantum 2021 will be held in Bilbao, Spain on November 23-25, 2021 as an in-person conference. The ongoing progress on building quantum computers, together with the push of quantum technologies including secure communication, sensing and quantum simulations are complemented by the vast family of emerging quantum materials which offer a revolutionary playground for fundamental science but also already put in perspective novel paradigms and future quantum techs combining ultralow-power with resilient and practical implementation and processing of quantum information. The conference aims at gathering the various communities engaged in these fields, to foster the incubation of new ideas and collaborations at the forefront of quantum science.

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 Santa Clara, 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.

The APS March 2022 Meeting will be held as an in-person event in Chicago, Illinois on March 14-18, 2022. This meeting is expected to include over a global audience of over 12,000 physicists, scientists, and students representing 30 APS Units and Committees and explore groundbreaking research from industry, academia, and major labs. The conference will include significant content related to quantum technologies.