Braid Topologies for Quantum Computation

Details Braid Topologies for Quantum Computation Braid Topologies for Quantum Computation

2005-05-10

arxiv.org/abs/quant-ph/0505065v3

Phys. Rev. Lett. 95, 140503 (2005)

Physics

Quantum Physics

4 pages, 4 figures, minor revisions

Scientific paper

10.1103/PhysRevLett.95.140503

In topological quantum computation, quantum information is stored in states which are intrinsically protected from decoherence, and quantum gates are carried out by dragging particle-like excitations (quasiparticles) around one another in two space dimensions. The resulting quasiparticle trajectories define world-lines in three dimensional space-time, and the corresponding quantum gates depend only on the topology of the braids formed by these world-lines. We show how to find braids that yield a universal set of quantum gates for qubits encoded using a specific kind of quasiparticle which is particularly promising for experimental realization.

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