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

Purpose and goal

In the RES-Q project, KTH Royal Institute of Technology and Chalmers University of Technology are pioneering a novel solid-state platform aimed at realizing quantum computing and quantum simulation for practical combinatorial optimization applications. Cuprous oxide (Cu2O), a semiconductor capable of hosting Rydberg excitons with large binding energy, serves as a solid-state analogue to highly excited atomic states. The core of RES-Q is to realize a solid-state based platform for large scale and nanosecond operation speed quantum computing tasks.

Expected effects and result

During Stage 1, our primary focus lies on the development of arbitrary two-dimensional geometry exciton arrays. Our proposed approach relies on the generation of reconfigurable light patterns based on spatial light modulation, either in amplitude or in phase. By tightly focusing the beam onto the Cu2O crystal, the inter-site spacing can be reduced to a few micrometers, thus the large dipoles will lead to strong mutual interactions. Our proposed platform will be reconfigurable and capable of simulating a wide variety of systems with different interparticle interactions.

Planned approach and implementation

Month 1-2: (WP1) SLM pattern design, A novel machine learning based algorithm will be developed to generate the phase patterns on SLM. Month 2-6: (WP2&3) KTH will focus on experimental generation of Rydberg exciton array and PL measurement of Rydberg series. Month 2-6: (WP4) CTH will map the geometry to a specific graph structure, which can be used to solve a Maximum Independent Set (MIS) problem. Month 7-8: (WP5&6) Drafting a comprehensive report, along with results and analysis. Continuous project management to ensure goal alignment, resource allocation, and timeline adherence.