arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0902.2512quant-ph
收藏

纳米力学QED效应的探讨

Probing Nano-Mechanical QED Effects

Y. B. Gao, S. Yang, Yu-xi Liu, C. P. Sun, Franco Nori

摘要:

我们提出并研究了一种“本征探测”的方法,在不引入任何外部探测器的情况下,在量子位纳米机械谐振器系统中模拟腔QED效应。这种金属纳米机械谐振器在微弱的驱动电流作用下,可以作为本征探测器,既作为谐振腔又作为探测器。纳米机械谐振器两端电动势的相关谱表明了腔QED效应。利用量子回归定理和微扰理论,我们解析地计算了相关谱。在弱驱动极限下,我们研究了驱动强度以及电荷量子比特与纳米机械谐振器之间的频率失谐对真空拉比分裂的影响。数值计算证实了我们的内在探测方法的有效性。

英文摘要:

We propose and study an "intrinsic probing" approach, without introducing any external detector, to mimic cavity QED effects in a qubit-nanomechanical resonator system. This metallic nanomechanical resonator can act as an intrinsic detector when a weak driving current passes through it. The nanomechanical resonator acts as both the cavity and the detector. A cavity QED-like effect is demonstrated by the correlation spectrum of the electromotive force between the two ends of the nanomechanical resonator. Using the quantum regression theorem and perturbation theory, we analytically calculate the correlation spectrum. In the weak driving limit, we study the effect on the vacuum Rabi splitting of both the strength of the driving as well as the frequency-detuning between the charge qubit and the nanomechanical resonator. Numerical calculations confirm the validity of our intrinsic probing approach.

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。

↑