Tokyo, Japan, Oct 4, 2007 - (JCN Newswire) - RIKEN, NEC
Corporation, and JST ("Japan Science and Technology Agency") have successfully demonstrated a
laser emission from one artificial atom by coupling superconducting quantum bits ("qubits") to
a resonator. The lasing effect was achieved by an extremely simple system - a single "atom"
coupled to a resonator - and represents a world first in the use of a superconducting qubit as
an artificial atom to generate lasing photons. The laser emission system leverages several
features of the superconducting qubit - the basic circuits of a quantum computer. For example,
the qubit can be easily used as a mediator in the resonator, and also allows easy control of
the circuit parameters by varying the gate potential and the local magnetic field.Application
of a nano-ampere current to the superconducting qubit enabled the resonator to emit a photon
every 0.5 nanoseconds, and a laser with a frequency of approximately 10 GHz (in the microwave
range) was detected. Shooting a microwave at the system from an external source increased the
power almost three fold, aligning the waves to demonstrate the emission to be a laser.The
emission system is expected to contribute to both fundamental and applied research on lasers.In particular, it may facilitate the development of an information system for converting
electronic information to microwaves, the compact microwave source that is necessary to control
and read qubits, and the quantum code that will be essential for absolutely secure information
management.This research was carried out as part of "Developing a superconducting qubit
system", under JST's CREST project "Creation of New Technology Aiming for the Realization of
Quantum Information Processing Systems", and was led by Dr. J. S. Tsai, Team Leader of RIKEN's
Macroscopic Quantum Coherence Laboratory and Chief Researcher at NEC's Nano Electronics
Research Laboratories. Further details of this research were published on October 4 by Nature
journal of science.About NEC CorporationNEC Corporation (TSE: 6701; NASDAQ: NIPNY) is one of
the world's leading providers of Internet, broadband network and enterprise business solutions
dedicated to meeting the specialized needs of its diverse and global base of customers. NEC
delivers tailored solutions in the key fields of computer, networking and electron devices, by
integrating its technical strengths in IT and Networks, and by providing advanced semiconductor
solutions through NEC Electronics Corporation. The NEC Group employs more than 150,000 people
worldwide. For additional information, please visit the NEC home page at: http://www.nec.com
About RIKENThe Riken Institute was first founded in 1917 as a private research foundation known
as 'RIKEN'. In 2003, it was reorganized as an Independent Administrative Institution under the
Ministry of Education, Culture, Sports, Science and Technology, since when it has engaged in
wide-ranging research activities that span basic to applied science. The objectives of RIKEN
are to conduct comprehensive research in science and technology (excluding only humanities and
social sciences) under the 'Riken Law', and to disseminate the results of its scientific
research and technological developments. Riken carries out high-level experimental and research
work in a wide range of fields, including physics, chemistry, medical science, biology and
engineering extending from basic research to practical application. For more information,
please visit www.riken.jp/About JSTThe Japan Science and Technology Agency (JST) mission is to
promote science and technology in Japan by conducting a broad range of activities, including
promotion of consistent research and development from basic research to commercialization with
particular emphasis on the creation of new technological seeds, and upgrading the
infrastructure for the promotion of science and technology, including dissemination of
scientific and technological information. Under the independent administrative institution
system, the realization of voluntary and self-reliant operation of activities, and the pursuit
of operations more effective than those of the past is required. For more information, please
visit www.jst.go.jp/EN/Source: NEC CorporationContact:RIKEN
Public Relations Office
+81-48-467-9272
NEC
Japan
Diane Foley
d-foley@ax.jp.nec.com
+81-3-3798-6511
Asia Pacific
Masako Hirano
m-hirano@bccs.nec.com.sg
+65-63792570
Europe America
Chris Shimizu
chris.shimizu@uk.neceur.com
+44-20-8752-2794
Kazuko Andersen
Kazuko.Andersen@necam.com
+1- 212-326-2502
JST
Mikiko FUKUSHIMA
Public Relations Division
Japan Science and Technology Agency
+81-3-5214-8404 Japan Corporate News Network. All rights reserved.
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