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(Lunch Seminar) Manifestation of Chiral Anomaly in Majorana-Josephson Devices
04/09
2019
- Title (Lunch Seminar) Manifestation of Chiral Anomaly in Majorana-Josephson Devices
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Abstract
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CAS Key Laboratory of Theoretical Physics | |||
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Institute of Theoretical Physics | |||
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Chinese Academy of Sciences | |||
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Lunch Seminar | |||
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Title 题目 |
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Speaker 报告人 |
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Affiliation 所在单位 |
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Date 日期 |
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Venue 地点 |
理论所主楼322报告厅 | ||
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Abstract 摘要 |
In this talk, I will demonstrate how to design various nonstandard types of Andreev-bound-state (ABS) dispersions in Josephson junctions consisting of topological superconductors. Here, the ABSs constitute composite quasiparticles, constructed from zero-energy Majorana bound states. As I will discuss, while the resulting ABS dispersions are mainly 2π-periodic, they still feature multiple crossings which are protected by the conservation of fermion parity. This is a remarkable finding, since such crossings have been so far viewed as a unique feature of 4π-periodic dispersions. Even more, considering networks of coupled junctions of this type, opens the door for topological band structures with nodes or Weyl points in synthetic dimensions, as well as the realization of chiral anomaly. This also allows for fermion-parity pumping with a cycle set by the ABS-dispersion details. The possible experimental demonstration of ABS engineering in these devices, will further unveil new paths for the detection of chiral anomaly and the underlying Majorana quasiparticles. | ||
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Contact Person 所内联系人 |
Sen Zhou | ||