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
공지 2023-02-27 12:00  E6-1 #1501  2023 봄학기 콜로키움 전체 일정
공지 2023-03-16 16:00  E6-2 #1323  2023 봄학기 광학분야 및 응집물리 특별세미나 전체 일정
239 2022-01-25 15:00  E6 #1501/online  Emulating twisted double bilayer graphene with a multiorbital optical lattice file
238 2019-09-10 15:00  #2502, E6-2  (2+1) D Duality Web from 3D Euclidean Lattice file
237 2022-01-12 11:00  Zoom and E6 #1323  Spectroscopic study of trapped ions towards probing dark matter and new physics file
236 2022-05-19 15:00  online  (광학분야 특별세미나)Development of a multimodal optical system for improved disease diagnosis
235 2022-05-19 15:00  online  (광학분야 특별세미나)Development of a multimodal optical system for improved disease diagnosis
234 2019-08-16 14:00  E6 Room(#1323)  Multiferroic and Magnetoelectric Effects by Tailoring Interfacial Chemistry and Physics in Correlated Oxides file
233 2021-05-17 17:00  Zoom webinar  Spin current generation and detection in uniaxial antiferromagnets file
232 2019-05-08 16:00  E6 Room(#1323)  Imaging valley dependent electron transport in 2D semiconductors file
231 2019-05-08 16:00  E6 Room(#1323)  Imaging valley dependent electron transport in 2D semiconductors file
230 2019-06-27 14:00  #2502, E6-2  Gapless Kitaev Spin Liquid to Loop and String Gases file
229 2016-06-16 16:00  #1323(E6-2, 1st fl.)  Quantum information processing using quantum dots and photonic crystal cavities
228 2020-12-11 16:00  online  Atomic and electronic reconstruction at van der Waals interface in twisted 2D materials
227 2019-08-01 14:00  E6 Room(#1323)  Low-density Superconductivity in SrTiO3 Probed by Planar Tunneling Spectroscopy file
226 2019-08-27 16:00  Rm. 1323, E6  Critical current properties of Fe-based superconductors file
225 2020-01-17 16:00  #1323, E6-2  Symmetry Breaking and Topology in Superfluid 3He file
224 2019-09-26 16:00  #1323, E6-2  Entanglement Swapping with Autonomous Polarization-Entangled Photon-Pairs from Warm Atomic Ensemble file
223 2019-12-27 15:00  E6-2,#5318  The superconducting order parameter puzzle of Sr2RuO4 file
222 2019-12-27 15:00  #5318, E6-2  The superconducting order parameter puzzle of Sr2RuO4 file
221 2022-05-12 16:00  E6-2. #1323 & Zoom  New frontiers of electroweak physics at the LHC
220 2022-05-19 16:00  E6-2. #1323 & Zoom  Chasing Long Standing Neutrino Anomalies with MicroBooNE