RIKEN, NEC, and JST Successfully Demonstrate Laser Emission From Artificial Atom/Superconducting Qubit.Tokyo, Japan, Oct 4, 2007 - (JCN JCN Japan Corporate News JCN Journal of Cognitive Neuroscience JCN Journal of Cardiovascular Nursing JCN Journal of Christian Nursing JCN Job Control Number JCN Journal of Child Neurology JCN joint communications network (US DoD) Newswire) - RIKEN RIKEN Rikagaku Kenkyusho (Institute of Physical and Chemical Research, Japan) , NEC (NEC Corporation, Tokyo, www.nec.com, www.necus.com) An electronics conglomerate known in the U.S. for its monitors. In Japan, it had the lion's share of the PC market until the late 1990s (see PC 98). NEC was founded in Tokyo in 1899 as Nippon Electric Company, Ltd. Corporation, and JST JST Japan Science and Technology Agency JST Japan Standard Time (GMT+0900) JST Jubilee Sailing Trust (UK) JST Joseph Smith Translation JST JWFC (Joint Warfighting Center) ("Japan Science and Technology Agency") have successfully demonstrated a laser emission from one artificial atom The term Artificial atom is commonly used to describe objects that have bound, discrete electronic states, as is the case with naturally occurring atoms. Semiconductor quantum dots are the most common example of artificial atoms. by coupling superconducting quantum bits ("qubits") to a resonator resonator /res·o·na·tor/ (rez´o-na?ter) 1. an instrument used to intensify sounds. 2. an electric circuit in which oscillations of a certain frequency are set up by oscillations of the same frequency in another . 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 (QUantum BIT) A data bit in quantum computing. Such an entity can hold more than two values. See quantum computing. 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 (computer) quantum computer - A type of computer which uses the ability of quantum systems, such as a collection of atoms, to be in many different states at once. In theory, such superpositions allow the computer to perform many different computations simultaneously. . 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 macroscopic /mac·ro·scop·ic/ (mak?ro-skop´ik) gross (2). mac·ro·scop·ic or mac·ro·scop·i·cal adj. 1. Large enough to be perceived or examined by the unaided eye. 2. 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 Corporation NEC Corporation (TSE See Tokyo Stock Exchange. TSE 1. See Tokyo Stock Exchange (TSE). 2. See Toronto Stock Exchange (TSE). : 6701; NASDAQ NASDAQ in full National Association of Securities Dealers Automated Quotations U.S. market for over-the-counter securities. Established in 1971 by the National Association of Securities Dealers (NASD), NASDAQ is an automated quotation system that reports on : 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 RIKEN The 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 An Independent Administrative Institution (独立行政法人, Dokuritsu gyōsei hōjin, IAI) is a newly designed type of legal body for Japanese governmental organizations regulated by the 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 JST The Japan Science and Technology Agency (JST) mission is to promote science and technology in Japan Japan is a much renowned country for its automotive and electronics industries, and Japanese electronic products account for a very large share in the world market, compared to a majority of other countries and also their automotive industries. 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 Corporation Contact: 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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