visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2020-11-20 16:00 
연사  
장소 Online 

 

SRC Seminar

 

 

 

 

 

Coherent control of field gradient induced quantum dot spin qubits

 

 

 

Dr. Dohun Kim

 

Department of Physics and Astronomy, and Institute of Applied Physics, Seoul National University

 

 

 

Nov. 20 (Fri.), 04:00 PM

 

Online seminar

 

https://kaist.zoom.us/j/82243139535
회의 ID: 822 4313 9535
암호: 151742

 

 

 

 

 

 

 

Abstract:

 

The electron spin degree of freedom in solids form natural basis for constructing quantum two level systems, or qubits. The electron spin qubit offers a route for fast manipulation of spins using magnetic resonance or field gradient induced electric control, but generally suffers from dephasing due to strong coupling to the environment, especially nuclear spin bath, where decoherence dynamics is often non-Markovian and quasi-static. This talk will review experimental progress of fast GaAs based spin qubits and efforts to mitigate or even control the environment nuclear spin bath using hyperfine interaction. Starting from discussing general introduction to quantum transport measurements in quantum dots, circuit design, and need for high-throughput measurement methods for developing highly coherent and scalable qubit platform, I will focus on implementations of advanced quantum measurement and control protocols of singlet-triplet qubits including high fidelity singlet-shot measurements, Bayesian estimation-based adoptive control, and sequential Monte-Carlo method. In particular, we show that clever quantum control using FPGA-based hardware programming enables real time Hamiltonian parameter estimation actively suppressing quasi-static noise.

 

 

 

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

Center for Quantum Coherence in Condensed Matter, KAIST

번호 날짜 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
605 2010-02-14 16:00    Physics Colloquium - 2011 Spring file
604 2023-04-14 12:00    (응집물리 세미나)Exotic quantum phenomena in two-dimensional materials file
603 2023-05-12 11:00    (응집물리 세미나)Interlayer conductivity and plasmon in weakly coupled layered systems
602 2022-05-26 16:00    (광학분야 특별세미나)Topological photonic devices
601 2023-06-01 16:00    (광학분야 세미나)Quantum sensing using a squeezed light from hot Rb vapor
600 2015-03-09 16:00    Physics Colloquium : 2015 Spring file
599 2022-03-31 16:00    (광학분야 특별세미나)Ultrafast time-resolved spectroscopy in topological materials
598 2023-03-30 16:00    (광학분야 세미나)Scalable quantum entanglement in trapped-ions based quantum computer
597 2022-08-17 11:00    Robust Hamiltonian Engineering of Large Quantum Systems (큰 양자시스템의 견고한 해밀토니안 엔지니어링)
596 2010-02-08 16:00    Physics Ciolloquium : 2010 Spring file
595 2009-10-21 16:00    Interdimensional Universality of Dynamic Interfaces
594 2025-05-23 11:00  천상모 교수(한양대학교)  Superconductivity in Topological Materials file
593 2025-04-28 16:00  지명국 (연세대 천문우주학과)  Galaxy Cluster Collisions as Cosmic Laboratories for Dark Matter file
592 2010-09-06 16:00    Physics Colloquium : 2010 Fall file
591 2025-04-11 11:00  조상연 박사(Wellman Center for Photomedicine)  Semiconductor Nanolaser Particles: The Building Blocks of Next-Generation, Highly Multiplexed Photonic Systems file
590 2017-03-21 16:00    Spring 2017: Physics Seminar Serises file
589 2025-04-04 12:00  조길영 교수(KAIST)  Theoretical Kaleidoscope of Quantum Material Research: From Quantum Field Theory and Quantum Information to Future Devices file
588 2022-05-16 16:00    Design synthetic topological matter with atoms and lights
587 2020-10-15 16:00    Towards resource-efficient and fault-tolerant quantum computation with nonclassical light
586 2022-04-25 16:00    Ultrafast electron beam, a tool to explore the nanoscopic world of materials(우리말강의)