INSIDE the Laboratory

Information Devices Division

Quantum-Optical Information Technology Laboratory

Keiichi Edamatsu, Professor
Yasuyoshi Mitsumori, Associate Professor
Mark Sadgrove, Associate Professor
Nobuyuki Matsumoto, Assistant Professor (Frontier Research Institute for Interdisciplinary Science)

Current information and communication technology utilizes macroscopic and classical quantities, such as electric voltage and light intensity. This classical technology will reach the limit of information density and processing speed in the near future. The quantum-mechanical counterpart, “quantum information and communication technology (QICT) ”, in which information is associated with microscopic quantum-mechanical quantities such as a single electron spin and a single photon polarization, is expected to outstrip classical information processing. Our goal is to develop such quantum information devices using light and matter, as well as to gain a deep understanding of their physics. Our on-going projects include:

  1. Novel techniques for the generation and detection of single photons and photon entanglement,
  2. Techniques for extreme quantum measurements and uncertainty relations,
  3. Coherent optical control and quantum optics in semiconductor quantum dots and microcavities,
  4. Use of optical nanofibers and nanophotonic devices to produce novel single photon sources,
  5. Quantum optomechanics of macroscopic mechanical oscillators.

In FY2015, we have 17 group members (staff: 6, students: 11) including five from overseas: Mark Sadgrove (Associate Professor) from New Zealand, Cao Bo (Ph.D student) from China, Pierre Vidil (M.C. student) from France, Seth Cataño Lopez (M.C. student) from Mexico, and Jacob Vikoren (visiting undergraduate student) from USA.

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