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Putting a spin on the Josephson effect

2022.09.22 15:50

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날짜 2022-09-30 14:30 
일시 Sep. 30 (Fri.), 02:30 PM 
장소 E6-2. 1st fl. #1323 & Zoom 
연사 Dr. Sunghun Park (IBS-PCS) 

SRC Seminar

 

 

“Putting a spin on the Josephson effect”

 

Dr. Sunghun Park

Center for Theoretical Physics of Complex Systems, IBS-PCS

 

Sep. 30 (Fri.), 02:30 PM

E6-2. 1st fl. #1323

https://kaist.zoom.us/j/83179561572
회의 ID: 831 7956 1572
암호: 216531

 

 

 

Abstract:

Finding qubit with long coherence times and high controllability is a long-standing goal in quantum information science and condensed matter physics. Spin degree of freedom confined by a superconducting gap has been considered as a new resource for such qubits. In this talk, I will present our recent theoretical and experimental studies on spin-split Andreev states in a semiconducting nanowire Josephson junction performed in collaboration with an experimental group. I provide a theoretical model for the junction which takes into account Rashba spin-orbit coupling in the nanowire containing several transverse subbands, identifying the spin-orbit splitting of Andreev states. The theory allows us to understand the response of the microwave resonator coupled to the junction observed in circuit quantum electrodynamics experiments. Finally, I discuss the possible uses of the Andreev spin states as a new superconducting qubit.

 

 

Contact: SunYoung Choi, (sun.0@kaist.ac.kr)

Center for Quantum Coherence in Condensed Matter, KAIST

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