Suter, DieterPeng, XinhuaDu, Jiangfeng2008-06-022008-06-022005-01-05Peng, 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.http://hdl.handle.net/2003/2537910.17877/DE290R-10122Using 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.enThe American Physical Society53010.1103/PhysRevA.71.012307article (journal)