Creation and manipulation of entanglement in spin chains far from equilibrium

被引：13

作者：

Galve, F. ^{[1
,4
]}

Zueco, D. ^{[2
,3
,4
]}

Reuther, G. M. ^{[4
]}

Kohler, S. ^{[4
,5
]}

Haenggi, P. ^{[4
]}

机构：

[1] IFISC CSIC UIB, Palma De Mallorca 07122, Spain

[2] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain

[3] Univ Zaragoza, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain

[4] Univ Augsburg, Inst Phys, D-86135 Augsburg, Germany

[5] CSIC, Inst Ciencia Mat Madrid, Madrid 29049, Spain

来源：

EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS | 2010年 / 180卷

关键词：

TRAPPED IONS; QUANTUM; SYSTEM; DYNAMICS; STATE;

D O I：

10.1140/epjst/e2010-01220-5

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate creation, manipulation, and steering of entanglement in spin chains from the viewpoint of quantum communication between distant parties. We demonstrate how global parametric driving of the spin-spin coupling and/or local time-dependent Zeeman fields produce a large amount of entanglement between the first and the last spin of the chain. This occurs whenever the driving frequency meets a resonance condition, identified as "entanglement resonance". Our approach marks a promising step towards an efficient quantum state transfer or teleportation in solid state system. Following the reasoning of Zueco et al. [1], we propose generation and routing of multipartite entangled states by use of symmetric tree-like structures of spin chains. Furthermore, we study the effect of decoherence on the resulting spin entanglement between the corresponding terminal spins.

引用

页码：237 / 246

页数：10

共 47 条

[1] Entanglement in many-body systems [J].