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|Author(s):||Joseph W. Britton; Brian C. Sawyer; Adam Keith; C.-C. Joseph Wang; James K. Freericks; Hermann Uys; Michael Biercuk; John J. Bollinger;|
|Title:||Engineered two-dimensional Ising interactions on a trapped-ion quantum simulator with hundreds of spins|
|Published:||April 26, 2012|
|Abstract:||The presence of long-range quantum spin correlations underlies a variety of physical phenomena in condensed matter systems, potentially including high-temperature superconductivity, making this a fertile area for exploration. Unfortunately, many properties of exotic strongly correlated systems (e.g. spin liquids) have proved difficult to study in part because calculations involving N-body entanglement become intractable for as few as N~30 particles. Feynman divined that a quantum simulator – a special-purpose "analog" processor built using quantum particles (qubits) – would be inherently adept at such problems. Several recent experiments have demonstrated the feasibility of this approach at a small scale in the context of quantum magnetism. However, no useful simulator for quantum magnetism – consisting of at least 50 particles and allowing controlled, tunable interactions in a two-dimensional (2D) system – has yet been demonstrated owing to the technical challenge of realizing large-scale 2D qubit arrays. Here we simulate a range of Ising-type spin-spin interactions J_ij on a naturally occurring 2D triangular crystal of 100|
|Pages:||pp. 489 - 492|
|Keywords:||Ion trapping,Ising interaction,laser cooling,Penning trap,quantum magnetism,quantum phase transition,quantum simulation,qubit|
|PDF version:||Click here to retrieve PDF version of paper (2MB)|