visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2018-06-14 10:00 
일시 June 14 (THU), 10:00 AM 
장소 E6-2, 2nd fl. #2502 
연사 Prof. Kenji Toyoda 

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 장소 제목
366 2022-08-18 10:00  E6-1 #1323  Disorder-driven phase transition in the second-order non-Hermitian skin effect
365 2018-08-01 11:00  양분순 빌딩 (E16-1) 207호  Future of AI: Is the brain a computer? file
364 2019-08-27 16:00  Rm. 1323, E6  Critical current properties of Fe-based superconductors file
363 2023-08-29 16:00  E6-2, #2502  [High Energy Theory Seminar] Towards string loop corrections in Calabi-Yau orientifold compactifications.
362 2019-08-14 16:00  Rm. 1323, E6  Quantum Optics, at the heart of quantum metrology and quantum information file
361 2019-08-16 14:00  E6 Room(#1323)  Multiferroic and Magnetoelectric Effects by Tailoring Interfacial Chemistry and Physics in Correlated Oxides file
360 2019-08-01 14:00  E6 Room(#1323)  Low-density Superconductivity in SrTiO3 Probed by Planar Tunneling Spectroscopy file
359 2019-08-06 16:00  E6 Room(#1323)  Visualization of in-plane piezoresponse vector fields file
358 2023-12-19 16:00  E6-2, #1323  [High Energy Theory Seminar] Non-invertible symmetries, leptons, quarks, and why multiple generations
357 2019-12-27 15:00  #5318, E6-2  The superconducting order parameter puzzle of Sr2RuO4 file
356 2023-12-08 10:30  E6-2, Rm#2502  Novel transport phenomena in insulators
355 2020-12-11 14:30  online  Antisymmetric interlayer exchange coupling in magnetic multilayers
354 2020-12-11 16:00  online  Atomic and electronic reconstruction at van der Waals interface in twisted 2D materials
353 2018-12-11 16:00  E6-2. 1st fl. #1323  Natural compact representation of Matsubara Green’s functions: applications to analytic continuation and quantum many-body simulations file
352 2016-12-12 13:30  1:30p.m. #1323(E6-2. 1st fl.)  “Possible symmetry in the phase diagrams of electron- & hole-doped cuprate high-Tc superconductors”
351 2022-12-13 11:00  E6-2 #1322  Art of thin film engineering toward topological quantum computation file
350 2017-12-13 13:30  자연과학동 대형강의실 (1501호)  KAIST-KIAS Joint Workshop in Theoretical Sciences 개최 file
349 2017-12-15 09:20  E6-2, Lecture Room #1323  Workshop on Magnetism in Unconventional Superconductors 개최 file
348 2018-12-16 16:00  E6-2. 1st fl. #1323  Lectures on 2d Conformal Field Theory file
347 2022-12-20 16:00  E6-2. #2501  Getting into Biology and Medicine as Physicist