Quantum Computing Research @ UM

"Just do the calculations" is a common saying in the field of quantum computing, the development of software for quantum computers. Everything in this field is new; simply doing the math is often the best way to proceed. At Maastricht University, an interdisciplinary group of scientists works in quantum computing research, they try to do more than just the math. David Mestel and Jérémie Gobeil describe the unsolved problems in quantum computing that they are researching.

David Mestel (Department of Advanced Computing Sciences) describes the field of quantum computing as "a huge world of ignorance". David studies quantum information theory, which is a branch of science that investigates the information hidden in quantum mechanical systems such as quantum computers. He goes on to say, "In classical computing, you can incrementally improve existing algorithms, but in quantum computing, all of these algorithms need to be developed, we have only discovered a few of them. The main goal of our work is to develop new ones and improve the existing ones."
Progress Physicist Jérémie Gobeil (Gravity Waves & Fundamental Physics) is studying the potential benefits of quantum computing in physics research, such as gravitational waves measured by the future Einstein Telescope. “You could apply classical computing solutions to a quantum computer, but you would gain nothing. Therefore, we need to consider other applications of quantum computers that take advantage of the unique benefits that a quantum computer may provide. The field of quantum computing began with simply trying things and seeing if they worked. Meanwhile, we made progress and can show that for some tasks, quantum computers will have advantages over classical ones (see box).

Riding the Wave

Calculations in qubits take the form of a quantum wave, a mathematical formula derived from quantum mechanics. If you read the wave's output, it collapses, or, to put it another way, it is destroyed. Jérémie: "At the moment, it is nearly impossible to read all of the information in a quantum wave. As a result, we try to make the calculations in a quantum algorithm as simple as possible. Just enter a little information, perform the complex quantum calculations, and then read only the part of the wave that interests you."

Hype Energy

Researchers in the field of quantum computing include computer scientists, physicists, and mathematicians, whereas classical computing is primarily the domain of computer scientists. Jérémie explains: "As long as there is no standardised hardware for quantum computers, you will need scientists from all of these fields to be able to discover algorithms and translate them to instructions the quantum computer can work with." At Maastricht University's Faculty of Science and Engineering, the field of quantum computing is highly interdisciplinary, involving scientists from all relevant scientific disciplines.


Quantum computing research is a hot topic; getting funding is relatively simple, but other hot topics, such as artificial intelligence, compete for attention and money. Jérémie: "Both on the level of hardware and algorithms, researchers and companies need to live up to the expectations, or else the ‘hype energy’ could shift towards different topics." Because quantum computing research is dependent on the advancement of hardware developments, researchers are faced with lots of uncertainties. Keeping the ‘hype energy’ might therefore be one of their hardest tasks.


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