Transfer of d-Level quantum states through spin chains by random swapping

Details Transfer of d-Level quantum states through spin chains by random swapping Transfer of d-Level quantum states through spin chains by random swapping

2006-12-17

arxiv.org/abs/quant-ph/0612144v3

Phys. Rev. A 75, 022321 (2007).

Physics

Quantum Physics

More discussion about the ground state has been added. Accepted in Physical Review A

Scientific paper

10.1103/PhysRevA.75.022321

We generalize an already proposed protocol for quantum state transfer to spin chains of arbitrary spin. An arbitrary unknown $d-$ level state is transferred through a chain with rather good fidelity by the natural dynamics of the chain. We compare the performance of this protocol for various values of $d$. A by-product of our study is a much simpler method for picking up the state at the destination as compared with the one proposed previously. We also discuss entanglement distribution through such chains and show that the quality of entanglement transition increases with the number of levels $d$.

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