Two-spin and multi-spin quantum entanglement in V12 polyoxovanadate molecular nanomagnet

Abstract

The paper reports a computational study of the quantum entanglement in V12 cluster molecular magnet. The low-temperature properties of the system are modelled with anisotropic quantum Heisenberg model on a tetramer of spins $S=1/2$ in the external magnetic field. The two-spin entanglement is quantified using the concurrence, whereas the fidelity serves as a measure of four-spin entanglement. The analytic and numerical results are derived and discussed, emphasizing the importance of real-space and spin-space interaction anisotropy and the role of quantum level crossings in the entanglement description in V12.

References in corpus (9)

• Spin qubits with electrically gated polyoxometalate molecules
• Witnessing entanglement in quantum magnets using neutron scattering
• Quantifying and controlling entanglement in the quantum magnet Cs${}_2$CoCl${}_4$
• Thermal entanglement properties of small spin clusters
• Evidence for entanglement at high temperatures in an engineered molecular magnet
• Entangled spin clusters: some special features
• Signature of Quantum Entanglement in NH4CuPO4.H2O
• Phase transitions and entanglement properties in spin-1 Heisenberg clusters with single-ion anisotropy
• Thermally stable multipartite entanglements in the frustrated Heisenberg hexagon