Quantum State Transfer with Limited Resources
In the quest for the achievement of realistic quantum state transfer protocols, relaxing the required conditions is a fundamental step. The use of multi-particle systems for the purpose of quantum information processing is made hard by a number of technical difficulties, related in particular to the lack of addressability of their single elements. We have thus to research novel ways to bypass these problems. Even if investigating the whole evolution of a quantum system is surely interesting, considering the behaviour of a few characteristic features could help us to find striking strategies in the context outlined above. This is exactly the idea at the basis of the method presented in this chapter, which we name information flux approach. Through it, we can design protocols for quantum state transfer in limited-control scenarios. In particular, we focus our interest in finding a way to avoid the initialisation of the spin chain. Different cases are described throughout the chapter.
KeywordsEntangle State Spin Chain State Transfer Quantum Information Processing Recurrence Formula
CDF and MP’s work was supported by the UK EPSRC with a grant under the “New Directions for EPSRC Research Leaders” initiative (EP/G004759/1). MSK’s work was supported by the grant NPRP 4-554-1-094 from Qatar National Research Fund. MP thanks the UK EPSRC for a Career Acceleration Fellowship.
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