Phys. Rev. Lett. 90, 067902 (2003) [4 pages]Topological Protection and Quantum Noiseless SubsystemsReceived 9 August 2002; published 14 February 2003 Encoding and manipulation of quantum information by means of topological degrees of freedom provides a promising way to achieve natural fault tolerance that is built in at the physical level. We show that this topological approach to quantum information processing is a particular instance of the notion of computation in a noiseless quantum subsystem. The latter then provides the most general conceptual framework for stabilizing quantum information and for preserving quantum coherence in topological and geometric systems. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.067902
DOI:
10.1103/PhysRevLett.90.067902
PACS:
03.67.Lx, 03.65.Fd
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