Quantum simulation of frustrated Ising spins with trapped ions

@article{Kim2010QuantumSO,
  title={Quantum simulation of frustrated Ising spins with trapped ions},
  author={Kihwan Kim and Ming-Shien Chang and Simcha Korenblit and Rajibul Islam and Emily E. Edwards and James K. Freericks and Guin-Dar Lin and Luming Duan and Christopher R. Monroe},
  journal={Nature},
  year={2010},
  volume={465},
  pages={590-593}
}
A network is frustrated when competing interactions between nodes prevent each bond from being satisfied. This compromise is central to the behaviour of many complex systems, from social and neural networks to protein folding and magnetism. Frustrated networks have highly degenerate ground states, with excess entropy and disorder even at zero temperature. In the case of quantum networks, frustration can lead to massively entangled ground states, underpinning exotic materials such as quantum… 
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