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arXiv:1103.2400 · Nature Communications

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

Rajibul Islam, E.E. Edwards, Kihwan Kim, S. É. Korenblit, Changsuk Noh, H. J. Carmichael, Guin-Dar Lin, Luming Duan, C.‐C. Joseph Wang, James K. Freericks, Christopher R. Monroe

Published Jul 5, 2011• 411 citations
arXivHTMLPDF
DOI
10.1038/ncomms1374

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We show that trapped ions are ideally suited for the simulation of quantum spin systems and for the observation of a rich variety of quantum phase transitions. By changing the laser intensities and polarizations, the dynamics of the internal states of the ions can be controlled in such a way that an Ising or Heisenberg-like interaction is induced between effective spins. Our scheme allows us to build an analog quantum simulator of spin systems with trapped ions and to observe and analyze quantum phase transitions with unprecedented opportunities for the measurement and manipulation of spins. The requirements for our proposal are met by current technology: it does not rely on the use of quantum gates, and striking many-body effects can be observed even when the fidelity of the simulation is smaller than the one required for quantum computation. Our proposal with trapped ions would solve many of the problems that are faced in the implementation of quantum simulations with neutral atoms in optical lattices.