visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2016-06-16 16:00 
연사  
장소 #1323(E6-2, 1st fl.) 

“Quantum information processing using quantum dots and photonic crystal cavities”

 

Jun. 16 (Thu) 4PM, #1323(E6-2, 1st fl.)
Hyochul Kim, Samsung Advanced Institute of Technology

 

The ability to interface light with solid-state quantum bits (qubits) is essential for future development of scalable and compact quantum information systems that operate on ultra-fast timescales. Photons act as ideal carriers of quantum information and can serve as an efficient quantum link between matter qubits. Quantum dots (QDs) provide a promising implementation of a matter qubit, which can store quantum information in both excitonic states and highly stable spin states, providing an atom-like system in a semiconductor platform. By coupling these QDs to optical nano-cavities it becomes possible to achieve the strong coupling regime where a QD can modify the cavity spectral response, providing an efficient light-matter interface.
In this talk, I will explain that the qubit state of a photon can be controlled by a single solid-state qubit composed of a QD strongly coupled to a photonic crystal cavity.  The QD acts as a coherently controllable qubit system that conditionally flips the polarization of a photon reflected from the cavity on picosecond timescales, which implements a controlled NOT logic gate between the QD and the incident photon. Furthermore, the spin of a single electron or hole trapped in a charged QD can be used as a solid-state qubit with long coherence time. I will discuss our recent experimental realization of a quantum phase switch using a solid-state spin confined in a QD strongly coupled to a photonic crystal cavity, where the switch applies a spin-dependent phase shift on a photon.


Contact: Yoonsoo Kim (T.2599)

번호 날짜 연사 제목
317 2019-09-27 14:30    Spin-charge conversion in topological insulators for spintronic applications file
316 2019-09-27 16:00    0D/1D/2D/3D III-V materials grown by MBE for Optelectronics file
315 2019-10-15 16:00    Moiré superlattices and graphene quasicrystal file
314 2019-10-16 16:00    Emergent black holes and monopoles from quantum fields file
313 2019-10-17 16:00    Top down manipulation of Waves : From Metamaterials, Correlated Disorder, Quantum Analogy, to Digital Processing file
312 2019-10-25 15:00    Physics Seminar file
311 2019-10-29 10:00    Unconventional Spin Transport in Quantum Materials file
310 2019-10-29 14:30    Quantum sensing file
309 2019-10-29 16:00    Particles and Gravity via String Geometry file
308 2019-10-31 10:00    Kondo meets Hubbard: Impurity physics for correlated lattices file
307 2019-11-01 14:30    Squeezing the best out of 2D materials file
306 2019-11-01 16:00    Electron transport through weak-bonded contact metal with low dimensional nano-material file
305 2019-11-05 16:00    Study on nanomaterials by the development of ultrahigh resolution laser-photoelectron microscopy (PEEM) file
304 2019-11-07 16:00    Integrated quantum photonics with solid-state quantum emitters file
303 2019-11-14 16:00    Semi-classical model of polariton propagation file
302 2019-11-20 16:00    Correlation between superconducting transition temperature and critical current density in irradiated iron-based superconductors file
301 2019-11-28 16:00    Generation of coherent EUV emissions using ultrashort laser pulses file
300 2019-12-03 16:00    Toward Quantum Materials with Correlated Oxides file
299 2019-12-05 16:00    Subwavelenth Photonic Devices: From Single Photon Sources to Solar Cell file
298 2019-12-13 13:00    Computational Material Designs: Current Status and Future Directions file