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)
385 2019-04-11 16:00    Massive screening for cathode active materials using deep neural network file
384 2018-09-20 16:00    Toward Cancer Treatment Using Terahertz Radiation: Demethylation of Cancer DNA file
383 2018-09-20 16:00    Toward Cancer Treatment Using Terahertz Radiation: Demethylation of Cancer DNA file
382 2018-10-18 16:00    Applications of nonlinear optics for condensed matter researches file
381 2018-05-09 16:00    Recent advances in thermoelectric bulk composites file
380 2017-01-09 16:00    Topological Defects and Phase Transitions" file
379 2016-07-28 16:00    Low Dimensional Electrons: On the Road to Hybrid Quantum Systems
378 2019-04-23 16:00    From Mott physics to high-temperature superconductivity file
377 2022-07-21 16:00    Quintessential axions file
376 2019-11-14 16:00    Semi-classical model of polariton propagation file
375 2017-12-15 09:20    Workshop on Magnetism in Unconventional Superconductors 개최 file
374 2024-05-01 16:00    [High Energy Theory Seminar] Across the Mass Spectrum: Utilizing Small-Scale Structures to Probe Dark Matters
373 2019-11-07 16:00    Integrated quantum photonics with solid-state quantum emitters file
372 2018-05-29 16:00    Investigation on metal nanostructure/semiconductor junction and its applications file
371 2020-10-23 14:00    Plasmon spectroscopy of low-dimensional superconductors in fluctuating regime file
370 2025-02-25 14:00  Prof. Igor Di Marco  Dynamical mean-field theory for strongly correlated materials file
369 2024-05-16 16:00    [High Energy Theory Seminar] Conformal Collider Physics
368 2018-07-13 14:00    Loop Induced Single Top Partner Production and Decay at the LHC
367 2018-12-11 16:00    Natural compact representation of Matsubara Green’s functions: applications to analytic continuation and quantum many-body simulations file
366 2017-08-31 14:00    “Berry phase and nonlinear response: photocurrent in noncentrosymmetric insulators and Weyl semimetals” file