Onset of a quantum phase transition with a trapped ion quantum simulator.

  title={Onset of a quantum phase transition with a trapped ion quantum simulator.},
  author={R. Islam and Emily E. Edwards and K. W. Kim and Simcha Korenblit and C. Noh and Howard J. Carmichael and Guin-Dar Lin and Luming Duan and C.C.-Joseph Wang and James K. Freericks and Christopher R. Monroe},
  journal={Nature communications},
A quantum simulator is a well-controlled quantum system that can follow the evolution of a prescribed model whose behaviour may be difficult to determine. A good example is the simulation of a set of interacting spins, where phase transitions between various spin orders can underlie poorly understood concepts such as spin liquids. Here we simulate the emergence of magnetism by implementing a fully connected non-uniform ferromagnetic quantum Ising model using up to 9 trapped (171)Yb(+) ions. By… 
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