All Possible Coupling Schemes in XY Spin Chains for Perfect State Transfer

Details All Possible Coupling Schemes in XY Spin Chains for Perfect State Transfer All Possible Coupling Schemes in XY Spin Chains for Perfect State Transfer

2011-01-06

arxiv.org/abs/1101.1156v1

Physics

Quantum Physics

4 pages, 1 figures

Scientific paper

We investigate quantum state transfer in XY spin chains and propose a recursive procedure to construct the nonuniform couplings of these chains with arbitrary length to achieve perfect state transfer(PST). We show that this method is capable of finding all possible coupling schemes for PST. These schemes, without external control fields, only involve preengineered couplings but not dynamical control of them, so they can be simply realized experimentally. The analytical solutions provide all information for coupling design.

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