ac-driven quantum spins: Resonant enhancement of transverse dc magnetization

被引：7

作者：

Flach, S ^{[1
]}

Miroshnichenko, AE ^{[1
]}

Ovchinnikov, AA ^{[1
]}

机构：

[1] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.65.104438

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We consider s=1/2 spins in the presence of a constant magnetic field in the z direction and an ac magnetic field in the x-z plane. A nonzero dc magnetization component in the y direction is a result of broken symmetries. A pairwise interaction between two spins is shown to resonantly increase the induced magnetization by one order of magnitude. We discuss the mechanism of this enhancement, which is due to additional avoided crossings in the level structure of the system.

引用

页码：1 / 6

页数：6

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