Day 1 Dec-2 2021
Session 2 18:00-18:45

Progress on trapped ion quantum computing and networking The next step in Quantum Computing: From NISQ to PISQ

†*Bertels, K., † Sarkar, A., ‡ Ashraf, I.
*lead presenter
†, University of Leuven, Belgium
‡ HITEC university, Pakistan

Given the impeding timeline of developing good quality quantum processing units, it is the moment to rethink the approach to advance quantum computing research. Rather than waiting for quantum hardware technologies to mature, we need to start assessing in tandem the impact of the occurrence of quantum computing in various scientific fields. However, to this purpose, we need to use a complementary but quite different approach than proposed by the NISQ vision, which is heavily focused on and burdened by the engineering challenges(Fig).
It is not the long-term solution but it will allow universities to currently develop research on quantum logic and algorithms and companies can already start developing their internal know-how on quantum solutions.

FIG. 1. Long term quantum research in different fields As shown in Figure 1, that is why we propose and advocate the PISQ-approach: Perfect Intermediate-Scale Quantum computing based on the already known concept of perfect qubits. This will allow researchers to focus much more on the development of new applications by defining the algorithms in terms of perfect qubits and evaluate them on quantum computing simulators that are executed on supercomputers.


M.J. Pacholski, G. Lemut, O. Ovdat, I. Adagideli, and C.W.J. Beenakker Phys. Rev. Lett. 126, 226801 (2021).

Koen Bertels´ current scientific research focuses on quantum computing and on the definition and implementation of a scalable quantum micro- and system architecture. He was a professor at Delft University of Technology working on the quantum topics. He was instrumental in making the US-based Intel finance the company’s initiative in quantum research in Delft. His group developed one of the first full stacks for a quantum computer. As he wanted to go beyond the physics challenges, he decided to change university and and now he is full professor the university of Leuven in Belgium. He also created a company called, with investments from Malaysia and Singapore. His work still involves specifying what the micro-architectural support is for the control of the quantum instructions and how the quantum accelerator is connected and integrated in a larger system design where classical logic is combined with quantum logic. The main approach focuses more on quantum accelerators and the full-stack definition that the QCA lab has defined and developed. In this context, the group defined many things such as the programming language, OpenQL, a generic implementation for the micro-architecture and the QBeeSim simulator platform to execute any quantum logic that can be defined.