Use of dynamical coupling for improved quantum state transfer

Details Use of dynamical coupling for improved quantum state transfer Use of dynamical coupling for improved quantum state transfer

2006-09-29

arxiv.org/abs/quant-ph/0609235v1

Phys. Rev. B 74, 235303 (2006)

Physics

Quantum Physics

5 pages, 7 figures

Scientific paper

10.1103/PhysRevB.74.235303

We propose a method to improve quantum state transfer in transmission lines. The idea is to localize the information on the last qubit of a transmission line, by dynamically varying the coupling constants between the first and the last pair of qubits. The fidelity of state transfer is higher then in a chain with fixed coupling constants. The effect is stable against small fluctuations in the system parameters.

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