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AKPIK: Arbeitskreis Physik, moderne Informationstechnologie und Künstliche Intelligenz

AKPIK 1: AKPIK Talks

AKPIK 1.8: Vortrag

Montag, 16. März 2020, 18:30–18:45, HSZ 301

Quantum-computer calculations of the ground state energy of negative hydrogen ion — •Ivana Miháliková^1,2, Martin Friák^1,2, Matej Pivoluska³, Martin Plesch³, and Mojmír Šob^4,1,5 — ¹Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Brno, Czech Republic — ²Department of Condensed Matter Physics, Faculty of Science, Masaryk University, Brno, Czech Republic — ³Institute of Computer Science, Masaryk University, Brno, Czech Republic — ⁴Central European Institute of Technology, CEITEC MU, Masaryk University, Brno, Czech Republic — ⁵Department of Chemistry, Faculty of Science, Masaryk University, Brno, Czech Republic

Quantum computing has become one of the most popular applications of quantum physics. Importantly, it is believed that quantum computers will surpass the efficiency of classical computers in near future. A wide range of problems in condensed matter physics and chemistry could be solved by quantum computers. Nowadays, IBM provides a cloud-based quantum computing platform (IBM Quantum Experience) offering five-qubit and sixteen-qubit quantum processors for a real run. In our study, we focused on the quantum simulation of negative hydrogen ion. We perform the simulations of the H⁻ ground state energy using Variational Quantum Eigensolver (VQE). Simulations were performed on the QASM simulator and also on five-qubit device. In order to obtain the ground state energy of the negative hydrogen ion we used several local optimization methods to converge energy of the system to the energy minimum.