On May 16, 1960, American physicist Theodore Maiman presents the world's first operating laser at Hughes Research Laboratories, Malibu, California. Today, lasers are present everywhere, ranging from common consumer devices such as DVD players, laser printers, and barcode scanners to professional laser devices for surgery and various other skin treatments, or in industry for cutting and welding materials. Actually, it was Albert Einstein, who has laid the theoretical foundations for the laser in his 1917 paper Zur Quantentheorie der Strahlung (On the Quantum Theory of Radiation).
The import of the free will theorem is that it is notonly current quantum theory, but the world itself that is non-deterministic, so that no future theory can return us to a clockwork universe.
The Quantum Chemistry Literature DataBase (QCLDB) is a database of those papers published after 1978 which treat ab initio calculations of atomic and molecular electronic structure. From about thirty core journals they are collected, surveyed, and given proper tags revealing the content and essence of the paper by the group of young Japanese quantum chemists. Those theoretical works even without reporting any computational results are also collected which are judged to have significant relevance to ab initio calculations, while no semi-empirical calculations are included. QCLDB is finally edited and copyrighted by Quantum Chemistry DataBase Group (QCDBG).
Quantum computers would be able to process information in ways that standard computers cannot by tapping the unusual properties of quantum mechanics, but an analysis suggests that quantum computers would outclass conventional machines only by a slight degree for most computing problems, writes MIT professor Scott Aaronson. Evidence now indicates that quantum machines would be susceptible to many of the same algorithmic restrictions as classical computers, and these restrictions are totally independent of the practical problems of constructing quantum computers. A solid quantum computer algorithm would guarantee that computational paths leading to an incorrect answer neutralize while paths reading to a right answer reinforce, Aaronson says. The discovery of an efficient quantum algorithm to solve NP-complete problems remains elusive despite much effort, but one definite finding is that such an algorithm would have to efficiently take advantage of the problems' structure in a manner that is outside the capabilities of present-day methods. Aaronson points out that physicists have yet to come up with a final theory of physics, which gives rise to the possibility that a physical way to efficiently solve NP-complete problems may one day be revealed by a future theory. "People speculate about yet more powerful kinds of computers, some of which would make quantum computers look as pedestrian as vending machines," he notes. "All of them, however, would rely on speculative changes to the laws of physics." Aaronson projects that the difficulty of NP-complete problems will someday be perceived as a basic principle that describes part of the universe's fundamental nature.
G. Mark, P. Vancso, L. Biro, D. Kvashnin, L. Chernozatonskii, A. Chaves, K. Rakhimov, and P. Lambin. FUNDAMENTAL AND APPLIED NANO-ELECTROMAGNETICS, page 89-102. PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS, CREATE Consortium; Belarusian State Univ, Inst Nucl Problems, SPRINGER, (2016)Workshop on Fundamental and Applied Nanoelectromagnetics, Minsk,
BYELARUS, MAY 25-27, 2015.
D. Patel, and M. Wilde. (2023)cite arxiv:2307.14932Comment: 29 pages, 7 figures, published in the journal special issue dedicated to the memory of Göran Lindblad.