Measurement-Based Teleportation Along Quantum Spin Chains
摘要
We consider teleportation of an arbitrary spin-1/2 target quantum state along the ground state of a quantum spin chain. We present a decomposition of the Hilbert space of the many body quantum state into 4 vector spaces. Within each of these subspaces, it is possible to take any superposition of states, and use projective measurements to perform unit fidelity teleportation. Any such superposition is necessarily a spin liquid state. We also show that all total spin-0 quantum states belong in the same space, so that it is possible to perform unit fidelity teleportation over any one-dimensional spin-0 many body quantum state. We generalise to -Bell states, and present some general bounds on fidelity of teleportation given a general state of a quantum spin chain.
引用
@article{arxiv.quant-ph/0501180,
title = {Measurement-Based Teleportation Along Quantum Spin Chains},
author = {J. P. Barjaktarevic and J. Links and G. J. Milburn and Ross H. McKenzie},
journal= {arXiv preprint arXiv:quant-ph/0501180},
year = {2009}
}
备注
5 pages, 2 figures, presented as posters at "Quantum entanglement in physical and information sciences", Pisa, 2004 and at the AIP Congress, Canberra, 2005