QUANTUM STATE TRANSFER THROUGH A QUBIT NETWORK WITH ENERGY SHIFTS AND FLUCTUATIONS

被引：42

作者：

Casaccino, Andrea ^{[1
]}

Lloyd, Seth ^{[1
]}

Mancini, Stefano ^{[2
]}

Severini, Simone ^{[3
,4
]}

机构：

[1] MIT, Elect Res Lab, Cambridge, MA 02139 USA

[2] Univ Camerino, Dept Phys, I-62032 Camerino, Italy

[3] Univ Waterloo, Inst Quantum Comp, Waterloo, ON N2L 3G1, Canada

[4] Univ Waterloo, Dept Combinator & Optimizat, Waterloo, ON N2L 3G1, Canada

来源：

INTERNATIONAL JOURNAL OF QUANTUM INFORMATION | 2009年 / 7卷 / 08期

关键词：

Spin networks; graph theory; quantum communication; COMMUNICATION; DYNAMICS;

D O I：

10.1142/S0219749909006085

中图分类号：

TP301 [理论、方法];

学科分类号：

081202 ;

摘要：

We study quantum state transfer through a qubit network modeled by spins with XY interaction, when relying on a single excitation. We show that it is possible to achieve perfect transfer by shifting (adding) energy to specific vertices. This technique appears to be a potentially powerful tool for changing, and in some cases improving, the transfer capabilities of quantum networks. Analytical results are presented for all-to-all networks and for all-to-all networks with a missing link. Moreover, we evaluate the effect of random fluctuations on the transmission fidelity.

引用

页码：1417 / 1427

页数：11

共 11 条

[1] ABSENCE OF DIFFUSION IN CERTAIN RANDOM LATTICES [J].