Quantum-state transfer via resonant tunneling through local-field-induced barriers

被引：72
作者：
Lorenzo, S. [1 ,2 ]
Apollaro, T. J. G. [1 ,2 ,3 ]
Sindona, A. [1 ,2 ]
Plastina, F. [1 ,2 ]
机构：
[1] Univ Calabria, Dipartimento Fis, I-87036 Arcavacata Di Rende, CS, Italy
[2] Ist Nazl Fis Nucl, Grp Collegato Cosenza, I-87036 Arcavacata Di Rende, CS, Italy
[3] Queens Univ Belfast, Sch Math & Phys, Ctr Theoret Atom Mol & Opt Phys, Belfast BT7 1NN, Antrim, North Ireland
来源：
PHYSICAL REVIEW A | 2013年 / 87卷 / 04期
关键词：
ENTANGLEMENT; CHAIN; PROPAGATION; DYNAMICS; QUBITS;
D O I：
10.1103/PhysRevA.87.042313
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Efficient quantum-state transfer is achieved in a uniformly coupled spin-1/2 chain, with open boundaries, by application of local magnetic fields on the second and last-but-one spins, respectively. These effective barriers induce the appearance of two eigenstates, bilocalized at the edges of the chain, which allow a high-quality transfer also at relatively long distances. The same mechanism may be used to send an entire e-bit (e.g., an entangled qubit pair) from one to the other end of the chain. DOI: 10.1103/PhysRevA.87.042313
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页数：8
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