Coherent control of field gradient induced quantum dot spin qubits
2020.11.17 14:03
장소 | Online |
---|---|
일시 | Nov. 20 (Fri.), 04:00 PM |
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
댓글 0
번호 | 일시 | 장소 | 연사 | 제목 |
---|---|---|---|---|
48 | Sep. 22 (Fri.), 01:00 PM | E6-2. 1st fl. #1323 | Dr. EunSeong Kim / Department of Physics, KAIST |
Superconductor-metal-insulator transition in thin Tantalum films
![]() |
47 | Jul. 07 (Thu.) 2PM | #1323(E6-2. 1st fl.) | Dr. Eun Ah Kim, CORNELL UNIV. | Let there be topological superconductors |
46 | 2015/08/04, 11PM | B501, Room Red, KI bldg. 5nd fl. | Dr. Eric Jin Ser Lee(Univ. of Manitoba, Canada) | Propagation of ultrasound through two- and three-dimensional strongly scattering media |
45 | July 2, 2020 (Thursday) | Zoom Video Conference Seminar | Dr. Emmanuel Flurin (CEA Saclay) |
An irreversible qubit-photon coupling for the detection of itinerant microwave photons
![]() |
44 | October 18 (Thu.), 10:00 AM | #1323, E6-2 | Dr. Duyoung Min |
Understanding membrane protein folding using single-molecule force techniques
![]() |
43 | May. 25th (Wed), 14:00 | E6 Room(#2501) | Dr. Duk-Hyun Choe(Samsung Advanced Institute of Technology) |
Atomic-level insights into ferroelectric switching and preferred orientation of ultrathin hafnia
![]() |
42 | #1323(E6-2. 1st fl.) | Jul. 10th (Mon), 4pm | Dr. Duk Young Kim Los Alamos National Laboratory |
“Intertwined Orders in a Heavy-fermion metal”
![]() |
41 | Nov. 20 (Fri.), 02:30 PM | Online | Dr. Doohee Cho | Lumpy Cooper pairs in an iron-based superconductor |
40 | Nov. 9 (Fri.), 04:00 PM | E6-2. 1st fl. #1323 | Dr. Donghun Lee |
Quantum sensing and imaging with diamond defect centers for nano-scale spin physics
![]() |
39 | Jan. 17(Mon) - 21 (Fri), 2-4pm | E6-2 Room 2502 | Dr. Donghui Jeong (Penn State University) |
Five Lectures on Observational Probes of Dark Energy
![]() |
38 | Nov. 04 (Fri), 3:00 PM | E6-2. #1323(1st fl.) | Dr. Dohun Kim, Department of Physics and Astronomy, SNU | Quantum information experiments using few electron spins in semiconductors |
» | Nov. 20 (Fri.), 04:00 PM | Online | Dr. Dohun Kim | Coherent control of field gradient induced quantum dot spin qubits |
36 | Mar 2 (Tue.), 16:00 | Online | Dr. Dmitry Svintsov |
Sensitive terahertz detection with graphene-based transistors
![]() |
35 | March 18(Fri.) 11:00 | Online seminar | Dr. Dirk Wulferding (IBS-Center for Correlated Electron Systems, Seoul National University, Seoul) |
(응집물리 세미나) Illuminating exotic states of matter: Raman spectroscopy as an experimental tool to characterize quantum spin liquids
![]() |
34 | September 5 (Wed.), 16:00 PM | #1323, E6-2 | Dr. Dirk Wulferding |
Shining a light on fractional excitations
![]() |
33 | June 22 (Fri.), 04:00 PM | #1323, E6-2 | Dr. Daniel Sando |
Tuning functional properties of BiFeO3 films using strain and growth chemistry
![]() |
32 | June 22 (Fri.), 04:00 PM | #1323, E6-2 | Dr. Daniel Sando |
Tuning functional properties of BiFeO3 films using strain and growth chemistry
![]() |
31 | Oct. 12 (Fri.), 02:30 PM | E6-2. 1st fl. #1323 | Dr. Daniel Kyungdeock Park |
Quantum Advantage in Learning Parity with Noise
![]() |
30 | May 16, 2016 (Mon) 4PM | #1323(E6-2, 1st Fl.) | Dr. Daniel Bowring , Fermi National Accelerator Laboratory | Tuning microwave cavities with biased nonlinear dielectrics for axion searches |
29 | 2015/11/19, 4PM | E6-2, #1323 | Dr. Daesu Lee (University of Wisconsin-Madison) | Emergent Collective Phenomena and Functions at Reduced Dimensions |