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:

aQuantum will be holding a series of three webinars to explain their QPath software which they call the first quantum development & application lifecycle platform for the creation of high-quality quantum algorithms in the hybrid solutions ecosystem. The webinars will take place on February 25, March 25, and April 29, 2021 and will cover how the software works, how to develop quantum algorithms and integrate them into software production cycles, and how to integrate classical and quantum software using QPath’s tools and services. To learn more about the webinars and to sign up to attend, click here.

The Quantum.Tech conference & exhibition will be held virtually on April 12-14, 2021. It covers the emerging commercial applications of quantum technologies. Tackling the spectrum of quantum technology, from quantum computing to sensing & metrology and secure communications & cryptography, this global forum will help Fortune 1000 enterprises understand and navigate the Quantum landscape, assess risks and opportunities, and help senior executives build a roadmap for quantum readiness.

The Bristol Quantum Information Technologies Workshop (BQIT) 2021 will be held as a virtual conference on April 26-28, 2021. BQIT is a three day annual workshop aimed at enabling leading UK and international academics and industrial partners to come together; to explore and discuss future ambitions and challenges in the field of Quantum Information Technologies. Since its conception in 2014 they have had 230 speakers and panelists who have presented their work and opinions on a range of topics, from quantum theory to innovation in industry.

The Unitary Fund will host their first quantum open source hackathon from May 14-30, 2021. The hackathon will consist of making contributions to about 10 different open source projects. Each project has a set of tagged features that are desired to be added to the project. The hackathon will award cash bounties for accepted contributions. There will also be both digital and physical swag that will be provided to those participants who make approved Pull Requests.

IQT New York Online 2021 will be held as a virtual conference on May 17-20, 2021. This is Inside Quantum Technology’s fifth conference on the commercialization of quantum technology and will cover the business of Quantum Computing, Quantum Networking, Quantum Sensors, and Quantum Cryptography.

The 3rd NIST PQC Standardization Conference is expected to be held as a virtual conference on June 7-9, 2021 pending finalization of some of the logistical details. NIST has selected seven finalists and eight alternates as part of Round 3 as candidates for standardization. The conference will discuss various aspects of these algorithms and to obtain valuable feedback for informing decisions on standardization. Each of the seven finalist submission teams has been invited to give an update on their algorithms, as well as the eight alternate candidate teams. NIST is soliciting research and discussion papers, surveys, presentations, case studies, panel proposals, and participation from all interested parties with a submission deadline of April 23, 2021.

The Quantum Computing Summit Singapore organized by Informa Tech will occur on June 9-11, 2021.  Additional information will be posted when it is available.

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 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 Quantum Computing Summit London organized by Informa Tech will occur on September 22-23, 2021.  Additional information will be posted when it is available.

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.

The IEEE Quantum Week 2021 will return on October 18-21, 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 Quantum Computing Summit Silicon Valley organized by Informa Tech will occur on November 3-4, 2021.  Additional information will be posted when it is available.

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 on December 7-9. 2021.  At this time, it has not yet been determined whether it will be an in-person, virtual, or hybrid event.  If it is in-person, it will take place 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.