Realizable spin models and entanglement dynamics in superconducting flux qubit systems
Qian Qian Shi, Sam Young Cho, Bo Li, Mun Dae Kim
DOI 10.1103/PhysRevB.77.104511 · Physical Review B
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Abstract
Realizable spin models are investigated in a superconducting flux qubit system. By adjusting system parameters, it is shown that various artificial spin systems can be realized such as the quantum Ising model and the class of XXZ spin model in the same flux qubit system. The entanglement dynamics of the realizable systems, especially for the two-qubit system, is discussed by means of their concurrence and fidelity. It is found that an unentangled input state can evolve to be a maximally entangled output state periodically due to the exchange interactions induced by two-qubit flipping tunneling processes.
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