2009/02/28 by Marcin Markiewicz, Marcin Wiesniak · 1 citation
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1103/physreva.79.054304
published as Phys. Rev. A 79, 054304 (2009)
arxiv created 2013/05/09 · arxiv updated 2013/05/10
We present a perfect state transfer protocol via a qubit chain with the evolution governed by the xx Hamiltonian. In contrast to the recent protocol announced in [Phys. Rev. Lett. \bf 101, 230502 (2008)], our method does not demand any remote-cooperated initialization and sending classical information about measurement outcomes. We achieve the perfect state transfer only with the assumption of access to two spins at each end of the chain, while the initial state of the whole chain is irrelevant.