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1004545_Yang

Detecting non-Abelian Anyons via Adiabatic Cooling Kun Yang, Florida State University, DMR 1004545.

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1004545_Yang

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  1. Detecting non-Abelian Anyons via Adiabatic CoolingKun Yang, Florida State University, DMR 1004545 In a system that supports 3D non-Abelian anyons, an adiabatic increase of the anyon number through the increase of magnetic field results in a cooling effetct, while heating occurs when no such anyon is present. A system that supports 3D non-Abelian anyons. SC stands for superconductor and TI stands for topological insulator. Green lines are superconducting vortex lines, and orange dots are the anyons. Anyons are exotic quantum particles with statistics that is neither bosonic (like that of photon) nor fermionic (like that of electron). Particularly exotic are the so-called non-Abelian anyons, whose ground state degeneracy increases exponentially with the particle number, even when their positions are fixed. While anyons do not exist as fundamental elementary particles, they can exist in condensed matter systems as (emergent) quasiparticles. For a long time anyons are believed to exist in two dimensions (2D) only. Very recently they have been predicted to exist in three dimensional (3D) systems as well. The PI’s group has proposed methods to probe both 2D and 3D non-Abelian anyons through an intriguing adiabatic cooling effect unique to such systems.

  2. Detecting non-Abelian Anyons via Adiabatic CoolingKun Yang, Florida State University, DMR 1004545 Broad Scientific/Technological Impact: Non-Abelian anyons are potentially useful for topological quantum computations, due to the fact that qubits made out their degenerate ground states are intrinsically fault-tolerant. The cooling effect discovered by the PI’s group has potential application for cryogenics/refrigeration at extremely low temperatures in systems that support these anyons. Community Services: The PI served on the local organizing committee of the 19th International Conference on Electronic Properties of Two-Dimensional Systems (EP2DS) held in Tallahassee this year, which was attended by over 500 scientists world-wide. Shown above are some snapshots of the conference. They all enjoyed the food, among other things! Personnel Development: The PI’s postdoc, Seiji Yamamoto, has been actively involved in this work. The PI has also been working closely with two graduate students, Wenxin Ding and Yuhui Zhang, on other projects. Ding is expected to graduate in 2012.

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