Rydberg Exciton Solid-State Quantum Computer (RES-Q)

Important results from the project

The RES-Q project, a collaboration between KTH and Chalmers, aims to develop a novel quantum computing platform based on Rydberg excitons in solid-state systems. During the first phase of the project, we have successfully achieved the main objectives set at the outset. A key milestone was the development and implementation of an algorithm for programming a spatial light modulator (SLM), enabling the generation of arbitrary two-dimensional light patterns for exciton excitation in Cu2O crystals.

Expected long term effects

The project lays the foundation for scalable solid-state quantum simulators using Rydberg excitons, enabling future breakthroughs in quantum computing, many-body physics, and combinatorial optimization. It enhances Sweden’s long-term capabilities in quantum technologies and fosters international collaboration, talent development, and potential industrial spinoffs in photonic and quantum systems.

Approach and implementation

The project followed a structured work package plan, starting with the development of a numerical algorithm for SLM programming, followed by experimental validation using test lasers. These activities were well-suited to the project goals and progressed as intended. Although an unexpected laser failure caused a brief delay, the project remained largely on schedule. The collaboration between KTH and Chalmers functioned efficiently, with complementary efforts in experiment and theory.