99%-fidelity ballistic quantum-state transfer through long uniform channels

被引：78

作者：

Apollaro, T. J. G. ^{[1
,2
]}

Banchi, L. ^{[3
]}

Cuccoli, A. ^{[4
,5
]}

Vaia, R. ^{[6
]}

Verrucchi, P. ^{[4
,5
,6
]}

机构：

[1] Univ Calabria, Dipartimento Fis, I-87036 Arcavacata Di Rende, CS, Italy

[2] Univ Calabria, Ist Nazl Fis Nucl, Grp Collegato Cosenza, I-87036 Arcavacata Di Rende, CS, Italy

[3] ISI Fdn, I-10126 Turin, TO, Italy

[4] Univ Florence, Dipartimento Fis, I-50019 Sesto Fiorentino, FI, Italy

[5] Ist Nazl Fis Nucl, Sez Firenze, I-50019 Sesto Fiorentino, FI, Italy

[6] CNR, Ist Sistemi Complessi, I-50019 Sesto Fiorentino, FI, Italy

来源：

PHYSICAL REVIEW A | 2012年 / 85卷 / 05期

关键词：

CHAIN; PROPAGATION;

D O I：

10.1103/PhysRevA.85.052319

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Quantum-state transfer with fidelity higher than 0.99 can be achieved in the ballistic regime of an arbitrarily long one-dimensional chain with uniform nearest-neighbor interaction, except for the two pairs of mirror-symmetric extremal bonds, say x (first and last) and y (second and penultimate). These have to be roughly tuned to suitable values x similar to 2N(-1/3) and y similar to 2(3/4)N(-1/6), where N is the chain length. The general framework can describe the end-to-end response in different models, such as fermion or boson hopping models and XX spin chains.

引用

页数：11

共 47 条

[11]

Briegel HJ, 2000, J MOD OPTIC, V47, P415, DOI 10.1080/095003400148303

[12] Exploiting boundary states of imperfect spin chains for high-fidelity state transfer [J].