Geometric Quantum Computation

Details Geometric Quantum Computation Geometric Quantum Computation

2000-04-04

arxiv.org/abs/quant-ph/0004015v1

J. Mod. Opt. 47(14-15):2501-2513, 2000.

Physics

Quantum Physics

15 pages, LaTeX, uses cite, eepic, epsfig, graphicx and amsfonts. Accepted by J. Mod. Opt

Scientific paper

We describe in detail a general strategy for implementing a conditional geometric phase between two spins. Combined with single-spin operations, this simple operation is a universal gate for quantum computation, in that any unitary transformation can be implemented with arbitrary precision using only single-spin operations and conditional phase shifts. Thus quantum geometrical phases can form the basis of any quantum computation. Moreover, as the induced conditional phase depends only on the geometry of the paths executed by the spins it is resilient to certain types of errors and offers the potential of a naturally fault-tolerant way of performing quantum computation.

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