Entanglement Routers Using Macroscopic Singlets

被引：57

作者：

Bayat, Abolfazl ^{[1
]}

Bose, Sougato ^{[1
]}

Sodano, Pasquale ^{[2
,3
]}

机构：

[1] Univ London Univ Coll, Dept Phys & Astron, London WC1E 6BT, England

[2] Univ Perugia, Dept Phys, I-06123 Perugia, Italy

[3] Univ Perugia, Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 18期

基金：

英国工程与自然科学研究理事会;

关键词：

STATE;

D O I：

10.1103/PhysRevLett.105.187204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose a mechanism where high entanglement between very distant boundary spins is generated by suddenly connecting two long Kondo spin chains. We show that this procedure provides an efficient way to route entanglement between multiple distant sites. We observe that the key features of the entanglement dynamics of the composite spin chain are well described by a simple model of two singlets, each formed by two spins. The proposed routing mechanism is a footprint of the emergence of a Kondo cloud in a Kondo system and can be engineered and observed in varied physical settings.

引用

页数：4

共 26 条

[21] Long-distance entanglement in spin systems [J].

Venuti, L. Campos ;

Boschi, C. Degli Esposti ;

Roncaglia, M. .

PHYSICAL REVIEW LETTERS, 2006, 96 (24)

[22] Real-time evolution using the density matrix renormalization group [J].

White, SR ;

Feiguin, AE .

PHYSICAL REVIEW LETTERS, 2004, 93 (07) :076401-1

[23] Exploiting quench dynamics in spin chains for distant entanglement and quantum communication [J].

Wichterich, Hannu ;

Bose, Sougato .

PHYSICAL REVIEW A, 2009, 79 (06)

[24] Unmodulated spin chains as universal quantum wires -: art. no. 034303 [J].

Wójcik, A ;

Luczak, T ;

Kurzynski, P ;

Grudka, A ;

Gdala, T ;

Bednarska, M .

PHYSICAL REVIEW A, 2005, 72 (03)

[25] Entanglement of formation of an arbitrary state of two qubits [J].

Wootters, WK .

PHYSICAL REVIEW LETTERS, 1998, 80 (10) :2245-2248

[26] Quantum router based on ac control of qubit chains [J].

Zueco, David ;

Galve, Fernando ;

Kohler, Sigmund ;

Haenggi, Peter .

PHYSICAL REVIEW A, 2009, 80 (04)

← 1 2 3 →