Advanced Quantum Magnetic Materials for Quantum Information Technologies
Project funded by the EU NextGenerationEU through the Recovery and Resilience Plan for Slovakia under project No. 09I03-03-V04-00403.
This project focuses on investigating the unconventional quantum properties of frustrated Heisenberg spin systems, drawing inspiration from novel quantum materials. The primary aim is to explore the robustness of quantum entanglement in the Heisenberg spin model under increasing temperature and magnetic field conditions, which holds significance for quantum computing and information processing. Additionally, the project seeks to comprehensively characterize the long-range entanglement of a prototypical frustrated Heisenberg spin system with a quantum spin-liquid ground state, as well as to investigate the suitability and effectiveness of using such systems for reliable quantum information storage from the perspective of bound mognons in high-field region.
Research aims:
1)To provide a complete description of the quantum spin liquid in material-inspired two-dimensional quantum Heisenberg spin system. The main emphasis will be laid on those candidates of quantum spin-liquid materials, which display extraordinary quantum features due to their closeness to a quantum critical point. Particular task of this aim is to clarify thermally-assisted suppression of long-range quantum entanglement within the quantum spin-liquid state in zero as well as nonzero magnetic field.
2) Thoroughly investigate the Heisenberg frustrated spin system with bound magnons emerging in the high-field regime. The unique properties of these bound magnons can play a crucial role in terms of the system’s potential for quantum information storage. By studying the dynamics and characteristics of bound magnons within the Heisenberg spin system, we will determine the suitability and effectiveness of using such systems for reliable quantum information storage.
Methodology: In solving the project, a combination of sophisticated analytical and numerical methods will be utilized, such as the theory of localized magnons, variational techniques, level spectroscopy method, Quantum Monte Carlo (QMC), QMC in a dimer basis, full exact diagonalization (ED), Lanczos method, and Density Matrix Renormalization Group (DMRG).