NIST logo

Publication Citation: Engineered two-dimensional Ising interactions on a trapped-ion quantum simulator with hundreds of spins

NIST Authors in Bold

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~(d_ij)^-a for 0.05
Citation: Nature
Volume: 484
Pages: pp. 489 - 492
Keywords: Ion trapping;Ising interaction;laser cooling;Penning trap;quantum magnetism;quantum phase transition;quantum simulation;qubit
Research Areas: Physics