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 2020 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:

A webinar presentation on Quantum Value by Sia Partners will be held on July 9, 2020 from 10:00 AM to 1:00 PM EDT.

A presentation titled A Tour through the Quantum Ecosystems hosted by the Kitchener-Waterloo Quantum Technologies Enthusiasts will occur on July 9, 2020 from 5:00 to 6:00  PM EDT.

IBM will be providing a virtual Qiskit Global Summer School from July 20-31, 2020. IBM states that this is two-week intensive summer school designed to empower the next generation of quantum developers with the knowledge to explore quantum applications on their own. Each day of the Qiskit Global Summer School consists of 3 hours of lectures followed by an hour-long hands-on programming lab where students implement quantum programs in Qiskit. Attendance is by invitation only and interested parties can register to request an invitation here. Additional information and a view of the daily curriculum can be found here.

A Quantum Information Science & Technology Summit has been postponed until September 2020 with a specific date to be determined soon.  It will be held at the New York Academy of Sciences in New York City. This summit is organized by the U.S. Department of Energy’s (DOE) Brookhaven National Laboratory as part of DOE’s InnovationXLab series.  It will connect leaders in the finance and banking, technology, communications, energy and materials sciences sectors to discuss how to accelerate Quantum Information Science & Technology (QIST) advancements that impact the nation and world.

The EPIC World Industrial Quantum Photonics Technology Summit will be held at the University of Glasgow in Glasgow, UK on September 3-4, 2020. The purpose of the summit is to bring together companies in the supply chain for five product ranges including quantum clocks, quantum imaging, quantum sensors, quantum computers and quantum communications networks.

The 9th annual Adiabatic Quantum Computing Conference (AQC 2020) has been cancelled.  Instead AQC 2020 will coincide with a conference on Quantum Annealing / Adiabatic Quantum Computing at the International Center for Theoretical Physics in Trieste, Italy, to be held on September 7-11, 2020.

The conference on Quantum Annealing / Adiabatic Quantum Computing will be held at the International Center for Theoretical Physics in Trieste, Italy on September 7-11, 2020. The conference will deal with academic and basic research on quantum annealing and adiabatic quantum computation with a broad focus including quantum approximate optimization (QAOA) and other variational quantum approaches and in close connection with the neighboring fields of Quantum Simulations and Quantum Computation.

The Quantum.Tech Boston conference has been scheduled for September 23-25, 2020.  Additional details will be posted at a later date.

The Quantum Technology International Conference 2020 (QTech 2020) will be held in Barcelona, Spain on November 2-4, 2020. The objectives of the conference is to present the latest developments of quantum technologies in the domains of quantum communication, computation, simulation, sensors and metrology, and their implementation using various platforms from atoms and ions to solid states, superconducting circuits and optics.

The IQT Europe 2020 conference will be held as a week long virtual event this Fall.  The conference will be produced by Inside Quantum Technologies, QuTech and 3DR Holdings and will be their second annual European conference. Details and a link to the website will be posted at a later date.

The IEEE Quantum Week, also known as the IEEE International Conference on Quantum Computing and Engineering (QCE) will be held in Broomfield, Colorado on October 12-16, 2020. This conference aims to bring together quantum professionals, researchers, educators, entrepreneurs, champions and enthusiasts to exchange and share their experiences, challenges, research results, innovations, applications, pathways and enthusiasm on all aspects of quantum computing, engineering and technologies.

The Q-turn workshop will be held as an online event from November 23-27, 2020.  It is a unique international quantum information workshop series with a core mission is to foster an inclusive community and highlight outstanding research that may be under-appreciated in other high-impact venues due to systemic biases

The fourth annual Q2B Conference presented by QCWare will be held as a virtual event on December 8-10, 2020.  Details will be posted at a later date.

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.