2009/03/16 by Xiang Hao, Hao, Xiang, Tao Pan +5
Physics and Astronomy · #Mechanical and Optical Resonators #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #quant-ph
paper · pdf · doi:10.48550/arxiv.0903.2705
10 pages, 3 figures
arxiv created 2009/03/16 · arxiv updated 2009/12/01
he multiqubit entangled states are coherently controlled in the quantum spin systems composed of N+1 interacting antiferromagnetic molecular rings. The tunable intermolecular couplings arise from the local exchange interactions between electron spins of N circumjacent magnets and those of one central molecular ring. The quantum dynamics of such system is analytically deduced by the effective spin hamiltonian with anisotropic Heisenberg couplings. It is found that entangled W states can be generated with a high precision under the circumstance of quantum fluctuations. The multiqubit entangled state is also transferred from some molecular rings to others by the selection of intermolecular couplings.