Rapid and Robust Spin State Amplification

被引：8

作者：

Close, Tom ^{[1
]}

Fadugba, Femi ^{[1
]}

Benjamin, Simon C. ^{[1
,2
]}

Fitzsimons, Joseph ^{[2
]}

Lovett, Brendon W. ^{[1
,3
]}

机构：

[1] Univ Oxford, Dept Mat, Oxford OX1 3PH, England

[2] Natl Univ Singapore, Ctr Quantum Technol, Singapore 117543, Singapore

[3] Heriot Watt Univ, Sch Engn & Phys Sci, Edinburgh EH14 4AS, Midlothian, Scotland

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 16期

基金：

新加坡国家研究基金会; 英国工程与自然科学研究理事会;

关键词：

SINGLE-SHOT READOUT; ELECTRON-SPIN; QUANTUM;

D O I：

10.1103/PhysRevLett.106.167204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Electron and nuclear spins have been employed in many of the early demonstrations of quantum technology. However, applications in real world quantum technology are limited by the difficulty of measuring single spins. Here we show that it is possible to rapidly and robustly amplify a spin state using a lattice of ancillary spins. The model we employ corresponds to an extremely simple experimental system: a homogenous Ising-coupled spin lattice in one, two, or three dimensions, driven by a continuous microwave field. We establish that the process can operate at finite temperature (imperfect initial polarization) and under the effects of various forms of decoherence.

引用

页数：4

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