Dresden 2026 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 14: Quantum Information Poster Session
QI 14.16: Poster
Mittwoch, 11. März 2026, 18:00–21:00, P4
Mitigating Noise in Quantum-Classical Electronic Band Structure Calculations — •Vojtěch Vašina1,2 and Martin Friák1 — 1Institute of Physics of Materials, Czech Academy of Sciences, Brno, Czech Republic — 2Brno University of Technology, Institute of Material Sciences and Engineering
Computational materials science is currently facing a significant scalability issue. Simulating large condensed matter systems requires immense computational resources because the computational complexity grows exponentially as the size of the system increases. Quantum computers are emerging as a possible solution to overcome this problem because they theoretically offer up to an exponential speedup for certain problems. Current Noisy Intermediate-Scale Quantum (NISQ) computers are too noisy to provide results that are sufficiently accurate so classical and quantum algorithms are combined into so-called quantum-classical hybrid algorithms to overcome high levels of noise. In our study, we focused on computing the electronic band structure of diamond as this problem is well known and can be accurately solved on classical computers allowing us to compare those results to results obtained from the Variational Quantum Deflation (VQD) algorithm. We specifically investigate different error suppression and error mitigation techniques because the fidelity of results sensitively depends on them. The quantum parts of the VQD algorithm were executed on real quantum computers provided by IBM.
Keywords: quantum-computing; NISQ; solids; quantum hybrid akgorithms; error mittigation