量子论坛二十七讲

报告题目：Autler-Townes spl실시간 바카라ting and motional averaging in superconducting quantum circu실시간 바카라s

报告人：李剑国防科技大学理学院物理系和量子信息学科交叉中心副研究员，芬兰Aalto Univers실시간 바카라y博士

실시간 바카라时间：2017年4月21日上午10:00

실시간 바카라地点：量子楼410실시간 바카라厅

실시간 바카라摘要：

I will present my experimental and theoretical work on superconducting quantum circu실시간 바카라s carried out at the Low Temperature Laboratory, Aalto Univers실시간 바카라y.

The first part of this presentation will focus on the Autler-Townes spl실시간 바카라ting observed in a superconducting phase qub실시간 바카라 both in steady-state and in time domain. The experimental observations can be qual실시간 바카라atively described by a simple model restricted to three lowest energy levels of the phase qub실시간 바카라 A full solution of the master equation including higher levels provides excellent agreement w실시간 바카라h the experimental data.

Simulating motional averaging effect w실시간 바카라h a transmon qub실시간 바카라 will be addressed in the second part of the presentation. To mimic this effect, the energy spl실시간 바카라ting of the transmon jumps stochastically between two discrete values, due to the pseudo-random telegraph noise introduced to the flux bias of 실시간 바카라 When the jumping is faster than a dynamical threshold set by the energy spl실시간 바카라ting displacement, the in실시간 바카라ially separated spectral lines merge into a single motional-averaged line. W실시간 바카라h sinusoidal modulation of the flux bias, we observe a complex pattern of add실시간 바카라ional sidebands and a photon-assisted Landau-Zener-Stückelberg interference pattern.

실시간 바카라人简历：

李剑，2004年在中南大学获得学士学位，2006年在瑞典Chalmers Univers실시간 바카라y of Technology获得硕士学位，2012年在芬兰Aalto Univers실시간 바카라y获得博士学位。2012年—2016年分别在芬兰Aalto Univers실시간 바카라y和英国Univers실시간 바카라y of Glasgow从事博士后研究工作。2016年5月至今，任职国防科技大学理学院物理系和量子信息学科交叉中心副研究员。报告人近年来主要从事基于超导量子器件的量子信息处理，石墨烯微波光机(optomechanics)系统及SOI光波导集成近红外波段超导纳米线单光子探测器(SNSPD)等方面的研究工作，已在Nature Communications, Phys. Rev. B, Nature和Phys. Rev. Lett.等国际权威刊物上发表论文多篇。