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关于10月10日Panagiotis Kotetes报告的通知

编辑:phyjd 时间:2019年09月30日 访问次数:160

题目:Synthetic Weyl Points and Chiral Anomaly in Majorana Devices

报告人:Panagiotis Kotetes, Institute of Theoretical Physics, Chinese Academy of Sciences Beijing

地点: 教十二-201

时间: 1010日,周四,14:00-14:55

 

摘要:

In this talk, I will demonstrate how to design various nonstandard types of Andreev-bound-state (ABS) dispersions, via a composite construction [1, 2] relying on Majorana bound states (MBSs). Here, the MBSs appear at the interface of a Josephson junction consisting of two topological superconductors. Each topological superconductor harbors multiple MBSs per edge by virtue of a chiral or a unitary symmetry. My collaborators and I have found [1, 2] that, while the ABS dispersions are 2π-periodic, they still contain multiple crossings which are protected by the conservation of fermion parity. Our findings open perspectives for topological band structures with nodes or Weyl points in synthetic dimensions, the realization of chiral anomaly and, finally, the possibility for fermion-parity pumping with a cycle set by the ABS-dispersion details. The successful experimental demonstration of ABS engineering in these devices, further promises to unveil new paths for the indirect detection of MBSs.

 

[1] P. Kotetes, M. T. Mercaldo and M. Cuoco, Phys. Rev. Lett. 123, 126802 (2019).

[2] M. T. Mercaldo, P. Kotetes and M. Cuoco, Phys. Rev. B 100, 104519 (2019).

 

个人简介:

Panagiotis Kotetes embarked last January on his five-year faculty appointment at the Institute of Theoretical Physics of the Chinese Academy of Sciences in Beijing.  During 2015-2018 he was a postdoctoral researcher at the Niels Bohr Institute of the University of Copenhagen. His first postdoctoral appointment was at the Karlsruhe Institute of Technology, where he worked for five years. Panagiotis carried out his Diploma, Masters and  Ph.D. studies at the National Technical University of Athens in Greece. His research interests and activity cover the topics of topological systems, unconventional superconductivity, exotic magnetism, and quantum computing.

 

欢迎老师和同学参加!