We are making researches on Quantum Optics and Quantum Information Science at Department of Applied Physics, The University of Tokyo.

Prof.Furusawa received Medal with Purple Ribon!!

A. Furusawa

"Perspective on hybrid quantum information processing: A way for large-scale quantum information processing"

Journal of Optics 19, 070401-1-3 (2017)

"Perspective on hybrid quantum information processing: A way for large-scale quantum information processing"

Journal of Optics 19, 070401-1-3 (2017)

Chosen as "Paper of the Week"

The 13th Japan-US Joint Seminar on Quantum Electronics and Laser Spectroscopy@Kanazawa, Japan (Sep.2018)

Experimental proof of nonlocal wavefunction collapse

for a single particle using homodyne measurements

M. Fuwa et al., Nature Communications, 6, 6665 (2015)

Ultra-Large-Scale continuous-variable cluster states

multiplexed in the time domain

S. Yokoyama et al., Nature Photonics 7, 982-986 (2013).

Quantum-enhanced optical-phase tracking

S. Takeda et al., Nature 500, 315-318 (2013).

Article on the website "2 Physics"

Deterministic quantum teleportation of photonic qubits

by a hybrid technique

H. Yonezawa et al., Science 337, 1514-1517 (2012).

Teleportation of Schrodinger's cat wave-packets of light

N. Lee et al., Science 332, 330-333 (2011).

Research

We demonstrated deterministic quantum teleportation of photonic qubits for the first time. That is, photonic qubits are always teleported in each attempt, in contrary to the former probabilistic scheme.

Optical generation of non-classical states toward universal quantum computation

Based on the continuous wave scheme, we achieved generation of arbitrary superpositions of zero- to three-photon-number states with 80% high-efficiency. In the same scheme we also generated the state required for the cubic phase gate, whose non-classicality has been verified [8].

Loop-based photonic quantum computer

We proposed a new architecture for optical quantum computation which can efficiently perform arbitrarily large-scale quantum computation with minimal optical components.

Books