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 2018-12-07 14:30  E6-2. 1st fl. #1323  Spin generation from heat and light in metals file
365 2018-12-07 16:00  E6-2. 1st fl. #1323  Novel probes of interacting electrons in 2D systems file
364 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
363 2018-12-16 16:00  E6-2. 1st fl. #1323  Lectures on 2d Conformal Field Theory file
362 2018-12-26 16:00  E6-1. 3rd fl. #3434  Informal Workshop on Topology and Correlation file
361 2018-12-26 16:00  E6-2. 1st fl. #1323  Brane-like defect in 3D toric code file
360 2018-12-27 16:00  E6-2. 1st fl. #1323  Quantum Innovation (QuIN) Laboratory file
359 2019-01-07 15:00  E6-2. 2st fl. #2501  Many-Body Invariants for Multipoles in Higher-Order Topological Insulators file
358 2019-01-09 16:00  E6-2. 2nd fl. #2501  Molecular Mott state in the deficient spinel GaV4S8 file
357 2019-01-23 16:00  Rm. C303, Creation Hall (3F), Munji Campus  Ultrasensitive Microwave Bolometer: Opportunity for Axion Detectors file
356 2019-02-21 16:00  #5313, E6-2  B-meson charged current anomalies - Theoretical status file
355 2019-02-25 16:00  Rm. 1501 (E6)  Spring 2019: Physics Colloquium file
354 2019-03-21 16:00  RM. 1323, E6-2  Spring 2019: Physics Seminar Serises file
353 2019-03-26 15:00  E6-2. 2st fl. #2501  Consideration of thermal Hall effect in frustrated and un-frustrated quantum magnets file
352 2019-03-29 14:30  E6-2. 1st fl. #1323  Epitaxial Multifunctional Oxide Thin Films for Novel Electronics file
351 2019-03-29 16:00  E6-2. 1st fl. #1323  Coherent Quantum Control and Magnetism on atoms – Trapped ion and ESR STM file
350 2019-04-04 16:00  #1323, E6-2  Chiral spin-photon interaction at nanoscale file
349 2019-04-11 16:00  #1323, E6-2  Massive screening for cathode active materials using deep neural network file
348 2019-04-19 11:00  #1323, E6-2  First-principles studies of semiconductors for solar cell applications file
347 2019-04-19 14:30  E6-2. 1st fl. #1323  A family of finite-temperature electronic phase transitions in graphene multilayers file