Xinhua Peng, Jiangfeng Du, Dieter Suter
Published 2004-11-08Version 1
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 (pseudo-pure) 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.
Comments: 5 pages, 5 eps figures. Accepted in Phys. Rev. A
Characterizing entanglement by momentum-jump in the frustrated Heisenberg ring at quantum phase transition
XY model on the circle: diagonalization, spectrum, and forerunners of the quantum phase transition
Interplay between quantum phase transitions and the behavior of quantum correlations at finite temperatures
