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
271 2019-11-01 14:30  E6-2. 1st fl. #1323  Squeezing the best out of 2D materials file
270 2019-10-31 10:00  #1323 (E6-2, 1st fl.)  Kondo meets Hubbard: Impurity physics for correlated lattices file
269 2019-10-29 16:00  #1323 (E6-2, 1st fl.)  Particles and Gravity via String Geometry file
268 2019-10-29 14:30  #1323, E6-2  Quantum sensing file
267 2019-10-29 10:00  #1323 (E6-2, 1st fl.)  Unconventional Spin Transport in Quantum Materials file
266 2019-10-25 15:00  #1323, E6-2  Physics Seminar file
265 2019-10-17 16:00  #1323, E6-2  Top down manipulation of Waves : From Metamaterials, Correlated Disorder, Quantum Analogy, to Digital Processing file
264 2019-10-16 16:00  #1323 (E6-2, 1st fl.)  Emergent black holes and monopoles from quantum fields file
263 2019-10-15 16:00  #1323, E6-2  Moiré superlattices and graphene quasicrystal file
262 2019-09-27 16:00  E6-2. 1st fl. #1323  0D/1D/2D/3D III-V materials grown by MBE for Optelectronics file
261 2019-09-27 14:30  E6-2. 1st fl. #1323  Spin-charge conversion in topological insulators for spintronic applications file
260 2019-09-26 16:00  #1323, E6-2  Entanglement Swapping with Autonomous Polarization-Entangled Photon-Pairs from Warm Atomic Ensemble file
259 2019-09-18 16:00  #1323, E6-2  Exploring Synthetic Quantum Matter in Superconducting Circuits file
258 2019-09-18 16:00  Seminar Room #1323  Fall 2019: Physics Seminar Serises file
257 2019-09-10 15:00  E6-2. 1st fl. #1323  Two-Stage Kondo Effect file
256 2019-09-10 15:00  #2502, E6-2  (2+1) D Duality Web from 3D Euclidean Lattice file
255 2019-09-02 16:00  Seminar Room 1501  Fall 2019: Physics Colloquium file
254 2019-08-27 16:00  Rm. 1323, E6  Critical current properties of Fe-based superconductors file
253 2019-08-22 16:00  #1323, E6-2  Physics and Applications in Nanoelectronics and Nonomechanics file
252 2019-08-19 10:00  Rm. 1322, E6-2  Tutorials on Multimode Quantum Optics in the Continuous Variable Regime file