arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0705.2573cond-mat.mes-hall
收藏

交流激励下隧道结中量子噪声的动力学

Dynamics of Quantum Noise in a Tunnel Junction under ac Excitation

J. Gabelli, B. Reulet

摘要:

我们报告的第一次测量的散粒噪声(在频率$ω$测量)的隧道结的\emph{dynamical response}的交流激励频率$ω_0$。实验是在低温T= 35 mK和高频$ω_0/2π=6.2$ GHz的量子区$\hbarω\sim\hbarω_0\gg k_BT$进行的。我们观察到,噪声响应与激励同相,但不是同步的。结果是在一个新的电流-电流相关器的基础上的预测非常好的协议。

英文摘要:

We report the first measurement of the \emph{dynamical response} of shot noise (measured at frequency $ω$) of a tunnel junction to an ac excitation at frequency $ω_0$. The experiment is performed in the quantum regime, $\hbarω\sim\hbarω_0\gg k_BT$ at very low temperature T=35mK and high frequency $ω_0/2π=6.2$ GHz. We observe that the noise responds in phase with the excitation, but not adiabatically. The results are in very good agreement with a prediction based on a new current-current correlator.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑