Effects of a quantum measurement on the electric conductivity: Application to graphene

被引：8

作者：

Bernad, J. Z. ^{[1
,2
]}

Jaaskelainen, M. ^{[1
,2
]}

Zulicke, U. ^{[1
,2
,3
]}

机构：

[1] Massey Univ, Inst Fundamental Sci, Palmerston North 4442, New Zealand

[2] Massey Univ, MacDiarmid Inst Adv Mat & Nanotechnol, Palmerston North 4442, New Zealand

[3] Massey Univ, Ctr Theoret Chem & Phys, Auckland 0745, New Zealand

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 07期

关键词：

COLLAPSE;

D O I：

10.1103/PhysRevB.81.073403

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We generalize the standard linear-response (Kubo) theory to obtain the conductivity of a system that is subject to a quantum measurement of the current. Our approach can be used to specifically elucidate how back-action inherent to quantum measurements affects electronic transport. To illustrate the utility of our general formalism, we calculate the frequency-dependent conductivity of graphene and discuss the effect of measurement-induced decoherence on its value in the dc limit. We are able to resolve an ambiguity related to the parametric dependence of the minimal conductivity.

引用

页数：4

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