Quantum phase transition of ground-state entanglement in a Heisenberg spin chain simulated in an NMR quantum computer

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Date

2005-01-05

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The American Physical Society

Abstract

Using an NMR quantum computer, we experimentally simulate the quantum phase transition of a Heisenberg spin chain. The Hamiltonian is generated by a multiple-pulse sequence, the nuclear-spin system is prepared in its (pseudopure) ground state, and the effective Hamiltonian varied in such a way that the Heisenberg chain is taken from a product state to an entangled state, and finally to a different product state.

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Peng, Xinhua; Du, Jiangfeng; Suter, Dieter: Quantum phase transition of ground-state entanglement in a Heisenberg spin chain simulated in an NMR quantum computer. In: Physical Reviews A Jg. 71(2005), 012307.