Physics – Quantum Physics
Scientific paper
2010-01-14
Phys. Rev. A 81, 042307 (2010)
Physics
Quantum Physics
Scientific paper
10.1103/PhysRevA.81.042307
We examine the speed and fidelity of several protocols for state or single excitation transfer in finite spin chains subject to diagonal and off-diagonal disorder. We find that, for a given chain length and maximal achievable inter-spin exchange (XY) coupling strength, the optimal static spin-coupling protocol, implementing the fastest state transfer between the two ends of the chain, is more susceptible to off-diagonal (XY coupling) disorder, as compared to a much slower but robust adiabatic transfer protocol with time-dependent coupling strengths.
Lambropoulos P.
Nikolopoulos Georgios M.
Petrosyan David
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