Entanglement and Quantum Phase Transitions via Adiabatic Quantum Computation

Details Entanglement and Quantum Phase Transitions via Adiabatic Quantum Computation Entanglement and Quantum Phase Transitions via Adiabatic Quantum Computation

2007-01-15

arxiv.org/abs/quant-ph/0701096v2

Eur. Phys. J. D 58, 409 (2010)

Physics

Quantum Physics

Revised

Scientific paper

10.1140/epjd/e2010-00105-9

For a finite XY chain and a finite two-dimensional Ising lattice, it is shown
that the paramagnetic ground state is adiabatically transformed to the GHZ
state in the ferromagnetic phase by slowly turning on the magnetic field. The
fidelity between the GHZ state and an adiabatically evolved state shows a
feature of the quantum phase transition.

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