Perfect state transfer on a spin-chain without state initialization

Details Perfect state transfer on a spin-chain without state initialization Perfect state transfer on a spin-chain without state initialization

2008-05-28

arxiv.org/abs/0805.4365v3

Phys. Rev. Lett. 101, 230502 (2008)

Physics

Quantum Physics

5 pages, 1 figure, RevTeX4

Scientific paper

10.1103/PhysRevLett.101.230502

We demonstrate that perfect state transfer can be achieved using an engineered spin chain and clean local end-chain operations, without requiring the initialization of the state of the medium nor fine tuning of control-pulses. This considerably relaxes the prerequisites for obtaining reliable transfer of quantum information across interacting-spin systems. Moreover, it allows us to shed light on the interplay among purity, entanglement and operations on a class of many-body systems potentially useful for quantum information processing tasks.

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