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This content will become publicly available on July 31, 2015

Title: Adiabatic topological quantum computing

Topological quantum computing promises error-resistant quantum computation without active error correction. However, there is a worry that during the process of executing quantum gates by braiding anyons around each other, extra anyonic excitations will be created that will disorder the encoded quantum information. Here, we explore this question in detail by studying adiabatic code deformations on Hamiltonians based on topological codes, notably Kitaev’s surface codes and the more recently discovered color codes. We develop protocols that enable universal quantum computing by adiabatic evolution in a way that keeps the energy gap of the system constant with respect to the computation size and introduces only simple local Hamiltonian interactions. This allows one to perform holonomic quantum computing with these topological quantum computing systems. The tools we develop allow one to go beyond numerical simulations and understand these processes analytically.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [3]
  1. Univ. of New Mexico, Albuquerque, NM (United States)
  2. Univ. of New Mexico, Albuquerque, NM (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. Univ. of Washington, Seattle, WA (United States)
  4. The Univ. of Sydney, Sydney (Australia)
Publication Date:
OSTI Identifier:
1206808
Grant/Contract Number:
AC04-94AL85000
Type:
Published Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 92; Journal Issue: 1; Journal ID: ISSN 1050-2947
Publisher:
American Physical Society (APS)
Research Org:
Sandia National Laboratories (SNL), Albuquerque, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS