Robust and Reliable Transfer of a Quantum State Through a Spin Chain

Details Robust and Reliable Transfer of a Quantum State Through a Spin Chain Robust and Reliable Transfer of a Quantum State Through a Spin Chain

2008-12-24

arxiv.org/abs/0812.4578v1

Physical Review A 80, 022330(2009)

Physics

Quantum Physics

5 pages, 4 figures

Scientific paper

We present several protocols for reliable quantum state transfer through a spin chain. We use a simple two-spin encoding to achieve a remarkably high fidelity transfer for an arbitrary quantum state. The fidelity of the transfer also decreases very slowly with increasing chain length. We find that we can also increase the reliability by taking advantage of a local memory and/or confirm transfer using a second spin-chain.

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