visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2020-11-20 16:00 
일시 Nov. 20 (Fri.), 04:00 PM 
장소 Online 
연사 Dr. Dohun Kim 

 

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 장소 제목
519 2017-03-21 16:00  Seminar Room 1323  Spring 2017: Physics Seminar Serises file
518 2017-12-14 15:00  Seminar Room (C303), Creation Hall (3F), KAIST Munji Campus  Exploring the Universe via GWs in the era of multi-messenger astronomy
517 2018-07-02 15:00  Seminar Room (C303), Creation Hall (3F), KAIST Munji Campus  High Precision Magnetic Field Measurement for the Muon g-2 Experiment file
516 2016-06-14 16:00  Seminar Room (#2502, 2nd fl.)  Photonic quantum network based on multimode squeezed vacuums and single-photon subtraction
515 2016-11-01 14:30  Seminar Room #1323(E6-2)  Search for dark sector particles in the B-factory experiments
514 2019-09-18 16:00  Seminar Room #1323  Fall 2019: Physics Seminar Serises file
513 2018-07-13 14:00  Room 5318, KAIST Natural Sciences Lecture Hall(E6).  Loop Induced Single Top Partner Production and Decay at the LHC
512 2018-07-27 15:00  Room 5318, KAIST Natural Sciences Lecture Hall(E6).  Muon g-2 in the 2HDM and MSSM: comprehensive numerical analysis and absolute maxima file
511 2018-07-27 15:00  Room 5318, KAIST Natural Sciences Lecture Hall(E6).  Muon g-2 in the 2HDM and MSSM: comprehensive numerical analysis and absolute maxima file
510 2018-07-26 14:00  Room 5318, KAIST Natural Sciences Lecture Hall(E6).  Inflation in String Theory and Backreaction file
509 2018-07-26 14:00  Room 5318, KAIST Natural Sciences Lecture Hall(E6).  Inflation in String Theory and Backreaction file
508 2018-07-12 17:00  Room 5318, KAIST Natural Sciences Lecture Hall(E6)  The MilliQan Experiment: Search for Milli-Charged Particles at the LHC
507 2023-04-04 16:00  Room 2501, KAIST Natural Sciences Lecture Hall(E6)  Chiral Magnetism: A Geometric Perspective
506 2023-02-20 16:00  Room 1323, KAIST Natural Sciences Lecture Hall(E6)  Physics of ferromagnet/superconductor junctions
505 2015-06-03 12:00  Room 101, E11  The First Wednesday Multidisciplinary Forum file
504 2017-04-05 12:00  Room 101, Creative Learning Bldg.(E11)  2017년 4월 첫수 융합포럼 개최 안내(물리학과 & 원자력 및 양자공학과 공동 개최)/The First Wednesday Multidisciplinary Forum in April 2017 organized by Dept. of Physics & Dept. of Nuclear & Quantum Engineering file
503 2019-01-23 16:00  Rm. C303, Creation Hall (3F), Munji Campus  Ultrasensitive Microwave Bolometer: Opportunity for Axion Detectors file
502 2019-02-25 16:00  Rm. 1501 (E6)  Spring 2019: Physics Colloquium file
501 2019-03-21 16:00  RM. 1323, E6-2  Spring 2019: Physics Seminar Serises file
500 2019-08-14 16:00  Rm. 1323, E6  Quantum Optics, at the heart of quantum metrology and quantum information file