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-Make it simple, elegant
and practical-
A. GaAs QDs B. Single
InAs QD post-microcavity (First generation) C. (Second generation) D. (Third generation) E. Single InAs QD photonic crystal
cavity F. GaAs MQW microcavity G. Single walled carbon nanotube H. Spectrum of donor bound
magneto-excitons
Intotroduction You have reached the homepage of Quantum Information
Science group at Stanford University, lead by Professor Yoshihisa Yamamoto.
The group conducts the basic research on quantum optics, semiconductor
mesoscopic physics, nuclear and electron spin resonance, with emphasis on
quantum information system applications. The research of the group is supported by ARO, DTO, DARPA, NSF, Japan Science and Technology Agency (JST), Ministry of Education, Science and Technology (MEXT), National Institute of Informatics (NII) and Communication Technologies (NICT), Japan Society for the Promotion of Science (JSPS), Nippon Telegraph and Telephone Corporation (NTT), and Hamamatsu Photonics Corporation.
What’s A single semiconductor
spin is completely controlled by ultrashort optical pulses."Complete quantum control of a
single quantum dot spin using ultrafast optical pulses“ Nature
456, 218 (November 2008) Entanglement based QKD
was implemented over 100km optical fiber. "Long-distance entanglement-based
quantum key distribution over optical fiber“ Optics
Express 16, 19119 (November 2008) An ensemble of donor
bound electron spins is controlled by ultrashort optical pulses. "Ultrafast control of donor-bound
electron spins with single detuned optical pulses“ Nature
Physics 4, 780 (September, 2008) First evidence for the
exciton-polariton superfluidity is established. "Observation of Bogoliubov excitations
in exciton-polariton condensates“ Nature
Physics 4, 700 (September, 2008) Superfluid zero-state and pi-state are observed in a 1D exciton
polariton condensate array. "Coherent zero-state and pi-state
in an exciton-polariton condensate array“ Nature,
450, 529 (2007) Strong coupling between a single InAs quantum dot and monolithic post
DBR microcavity was realized. “Photon
Antibunching from a Single Quantum-Dot-Microcavity System in the Strong Coupling
Regime” Phys.
Rev. Lett. 98, 117402 (2007) Very fast (100GHz clock frequency) quantum computation based on semiconductor
electron spins controlled by coherent state optical pulses is proposed. “Quantum
Computers Based on Electron Spins Controlled by Ultrafast Off-Resonant Single
Optical Pulses” Phys.
Rev. Lett. 99, 040501 (2007) A DPS-QKD system with 10GHz clock frequency and 200km fiber
transmission line is demonstrated using superconducting single photon
detectors. “Quantum key distribution over a 40-dB channel loss using
superconducting single-photon detectors”
Nature
Photonics 1, 343 (2007) Off-diagonal long range order is observed in the exciton polariton
condensate by using the Young's double slit interferometer. “Spatial
Coherence of a Polariton Condensate” Phys.
Rev. Lett. 99, 126403 (2007) Solid-state physical system to investigate a quantum fermionic Hubbard
model is proposed using surface acoustic waves. “Quantum
simulator for the Hubbard model with long-range Coulomb interactions using
surface acoustic wavers” Phys.
Rev. Lett. 99, 016405 (2007) A collective behavior of electrons in a single-walled carbon nanotube
is revealed via shot noise and conductance. “Tomonaga-Luttinger
Liquid Features in Ballistic Single-Walled Carbon Nanotubes: Conductance and
Shot Noise” Phys.
Rev. Lett. 99, 036802 (2007)
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Update: Feb 17, 2008