High Fidelity State Transfer Over an Unmodulated Linear XY Spin Chain

Details High Fidelity State Transfer Over an Unmodulated Linear XY Spin Chain High Fidelity State Transfer Over an Unmodulated Linear XY Spin Chain

2009-10-09

arxiv.org/abs/0910.1829v2

Phys. Rev. A 81, 042313 (2010)

Physics

Quantum Physics

Replaced with published version. 8 pages, 5 figures

Scientific paper

We provide a class of initial encodings that can be sent with a high fidelity
over an unmodulated, linear, XY spin chain. As an example, an average fidelity
of ninety-six percent can be obtained using an eleven-spin encoding to transmit
a state over a chain containing ten-thousand spins. An analysis of the magnetic
field dependence is given, and conditions for field optimization are provided.

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