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Author: T. Henningsen
Publisher:
ISBN:
Category :
Languages : en
Pages : 85
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Book Description
The Optical Transistor and Switch, for which concepts and designs were developed under this program, is a device in which a radiation beam of one wavelength is controlled by a beam of a second wavelength. In contrast to other optical transistors and switches, this arrangement keeps the requirements for control and signal independent and thus adds another dimension to design. The basic device provides simply an optical path through a medium which consists of of free three-energy level atoms such as sodium vapor at very low pressures. It provides, with relatively low optical powers, satisfactory switching action and transistor saturation gains of 3-10. A subsequent concept is that of Multistate Optical Transistors based on spectroscopically complementary materials. Very high transistor gains can be achieved with two variations of this concept. However, the higher optical power demand and the stringent requirement of double resonance between two materials are important drawbacks. The third concept is the Quantum Transition Etalon which consists of a Fabry-Perot cavity enclosing the three-level medium. The QTE appears to have substantially the advantages of the two former concepts, but none of their limitations.
Author: T. Henningsen
Publisher:
ISBN:
Category :
Languages : en
Pages : 85
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Book Description
The Optical Transistor and Switch, for which concepts and designs were developed under this program, is a device in which a radiation beam of one wavelength is controlled by a beam of a second wavelength. In contrast to other optical transistors and switches, this arrangement keeps the requirements for control and signal independent and thus adds another dimension to design. The basic device provides simply an optical path through a medium which consists of of free three-energy level atoms such as sodium vapor at very low pressures. It provides, with relatively low optical powers, satisfactory switching action and transistor saturation gains of 3-10. A subsequent concept is that of Multistate Optical Transistors based on spectroscopically complementary materials. Very high transistor gains can be achieved with two variations of this concept. However, the higher optical power demand and the stringent requirement of double resonance between two materials are important drawbacks. The third concept is the Quantum Transition Etalon which consists of a Fabry-Perot cavity enclosing the three-level medium. The QTE appears to have substantially the advantages of the two former concepts, but none of their limitations.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 804
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author: Gilbert Kalb
Publisher: IOS Press
ISBN: 9789051990973
Category : Computers
Languages : en
Pages : 220
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Book Description
A survey of products and research projects in the field of highly parallel, optical and neural computers in the USA. It covers operating systems, language projects and market analysis, as well as optical computing devices and optical connections of electronic parts.
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 508
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Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 492
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Author:
Publisher:
ISBN:
Category : Research
Languages : en
Pages : 966
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Book Description
Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Author:
Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 1164
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Book Description
Author: R. J. Litchford
Publisher:
ISBN:
Category : Detonation waves
Languages : en
Pages : 52
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Book Description
Author: Jonathan P. Dowling
Publisher: Taylor & Francis
ISBN: 1439896747
Category : Mathematics
Languages : en
Pages : 453
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Book Description
The race is on to construct the first quantum code breaker, as the winner will hold the key to the entire Internet. From international, multibillion-dollar financial transactions to top-secret government communications, all would be vulnerable to the secret-code-breaking ability of the quantum computer. Written by a renowned quantum physicist closely involved in the U.S. government’s development of quantum information science, Schrödinger’s Killer App: Race to Build the World’s First Quantum Computer presents an inside look at the government’s quest to build a quantum computer capable of solving complex mathematical problems and hacking the public-key encryption codes used to secure the Internet. The "killer application" refers to Shor’s quantum factoring algorithm, which would unveil the encrypted communications of the entire Internet if a quantum computer could be built to run the algorithm. Schrödinger’s notion of quantum entanglement—and his infamous cat—is at the heart of it all. The book develops the concept of entanglement in the historical context of Einstein’s 30-year battle with the physics community over the true meaning of quantum theory. It discusses the remedy to the threat posed by the quantum code breaker: quantum cryptography, which is unbreakable even by the quantum computer. The author also covers applications to other important areas, such as quantum physics simulators, synchronized clocks, quantum search engines, quantum sensors, and imaging devices. In addition, he takes readers on a philosophical journey that considers the future ramifications of quantum technologies. Interspersed with amusing and personal anecdotes, this book presents quantum computing and the closely connected foundations of quantum mechanics in an engaging manner accessible to non-specialists. Requiring no formal training in physics or advanced mathematics, it explains difficult topics, including quantum entanglement, Schrödinger’s cat, Bell’s inequality, and quantum computational complexity, using simple analogies.
Author: United States. Congress. Senate. Committee on Appropriations. Subcommittee on HUD-Independent Agencies
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 804
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Book Description
