2007/01/31 by Sangchul Oh
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum many-body systems #quant-ph
paper · pdf · doi:10.1140/epjd/e2010-00105-9
published as Eur. Phys. J. D 58, 409 (2010) · Revised
arxiv created 2009/10/30 · openalex publication_date 2010/04/23 · arxiv updated 2010/07/26 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/29
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.