visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2018-06-14 10:00 
연사  
장소 E6-2, 2nd fl. #2502 

Physics Seminar

 

 

Phonons and polariton-like particles in trapped ions for quantum computation and quantum simulation”

 

Prof. Kenji Toyoda

Osaka University

 

June 14 (THU), 10:00 AM

E6-2, 2nd fl. #2502

 

Phonons are ubiquitous quantum-mechanical excitations representing the quantized energies of vibrational modes.  They are becoming more and more actively controled and used in such areas as phonon engineering and optomechanical systems. In the study of trapped ions for quantum information processing, as well, phonons has taken essential roles. They have been traditionally used to mediate information between internal-state qubits to realize quantum gates. On the other hand, they have certain useful properties, in their own right, for use as independent degrees of freedom. Phonons obey the Bose-Einstein statistics, and by adjusting trap parameters they can take global as well as local characteristics. These properties can be utilized for such areas as quantum computation and quantum simulation.

  In this talk, I would like to present three topics related to phonons and characteristic motions in trapped ions. The first one is experiments on two-phonon interference (the Hong-Ou-Mandel effect) and prospects toward realization of phonon-based quantum computing using the interference of multiple phonons. The second topic is the quantum simulation of interacting particles in solid-state materials based on phonon-based quasiparticles. When ions are illuminated with optical pulses resonant to vibrational sidebands, quasiparticles called phonon-polaritons are formed, which can be used for quantum simulation that catches the basic characteristics of interacting electrons in solids. The last topic is the study of a ''quantum rotor'' made from a three-ion crystal in a triangular shape. The superpositions of optically distiguishable two orientations of the crystal are realized by cooling its rotational mode to the ground state. Furthermore, their dependence to an applied static magnetic field, due to the Aharonov-Bohm effect, is observed.

 

Contact: EunJung Jo, Physics Dept., (jojo@kaist.ac.kr)

 

Department of Physics, 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)
426 2020-12-02 10:00    Recent progress in Axion Dark Matter eXperiment (ADMX) technology file
425 2020-11-17 12:00    Quantum- & Nano-Photonics" 세미나 시리즈 file
424 2023-05-15 16:00    Role of dark Higgs boson in DM physics and cosmology file
423 2019-10-15 16:00    Moiré superlattices and graphene quasicrystal file
422 2024-07-22 14:00    Nonthermal electronic orders in photo-doped Mott insulators
421 2017-08-16 16:00    Phonon-driven spin-Floquet valleytro-magnetism file
420 2025-02-03 14:00  Prof. Nobuyuki Yoshioka  Towards early fault-tolerant quantum computing file
419 2023-07-14 11:00    Interfaces engineering of thin film oxides
418 2024-07-25 16:00    Generation and Certification of Optical Quantum States for Information Processing file
417 2019-08-14 16:00    Quantum Optics, at the heart of quantum metrology and quantum information file
416 2019-10-17 16:00    Top down manipulation of Waves : From Metamaterials, Correlated Disorder, Quantum Analogy, to Digital Processing file
415 2018-12-27 16:00    Quantum Innovation (QuIN) Laboratory file
414 2025-03-07 11:00  Prof. Myunglae Jo  A tunable Mach-Zehnder interferometer in quantum hall graphene file
413 2023-09-27 16:00    Chiral Magnets: Domain-Wall Skyrmions and String Theory Realization
412 2019-06-04 17:00    Stochastic nature of bacterial eradication using antibiotics file
411 2015-06-03 12:00    The First Wednesday Multidisciplinary Forum file
410 2016-11-10 16:00    Low Dimensional Active Plasmonics and Electron Optics in Graphene
409 2023-07-20 16:00    [CAPP Seminar] Cosmoparticle Physics of Dark Universe file
408 2018-09-07 15:00    Recent developments in density functional theory: From new functionals to the nature of the chemical bond file
407 2021-04-09 10:00    Integrated Lithium Niobate Photonics file