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The three candidate cities were Tokyo, Istanbul, and Madrid.The applicant cities of Baku and Doha were not promoted to candidate status. A bid from Rome was withdrawn. Host city selection The International Olympic Committee (IOC) voted to select the host city of the 2020 Summer Olympics on 7 September 2013, at the 125th IOC Session in Buenos Aires, Argentina, using an exhaustive ballot system.
Theodor Herzl was the founder of the modern Zionist movement. In his 1896 pamphlet Der Judenstaat, he envisioned the founding of a future independent Jewish state during the 20th century. Zionism (/ ˈ z aɪ. ə n ɪ z əm / ZY-ə-niz-əm; Hebrew: צ י ו נו ת, romanized: Ṣīyyonūt, IPA:; derived from Zion) is a nationalist movement that emerged in Europe in the late 19th century aiming ...
Hummingbirds are birds native to the Americas and comprise the biological family Trochilidae. With approximately 366 species and 113 genera, [1] they occur from Alaska to Tierra del Fuego, but most species are found in Central and South America. [2] As of 2024, 21 hummingbird species are listed as endangered or critically endangered, with ...
- Origin and Motivation
- Thought Experiment
- Analysis
- Interpretations
- Applications and Tests
- Extensions
- Further Reading
- External Links
Schrödinger intended his thought experiment as a discussion of the EPR article—named after its authors Einstein, Podolsky, and Rosen—in 1935. The EPR article highlighted the counterintuitive nature of quantum superpositions, in which a quantum system for two particles does not separate: 150 even when the particles are detected far from their last p...
Schrödinger wrote: Schrödinger developed his famous thought experiment in correspondence with Einstein. He suggested this 'quite ridiculous case' to illustrate his conclusion that the wave function cannot represent reality.: 153 The wave function description of the complete cat system implies that the reality of the cat mixes the living and dead ca...
In modern terms Schrodinger's hypothetical cat experiment describes the measurement problem: quantum theory describes the cat system as a combination of two possible outcomes but only one outcome is ever observed.: 57 : 1269 The experiment poses the question, "when does a quantum system stop existing as a superposition of states and become one or t...
Since Schrödinger's time, other interpretations of quantum mechanics have been proposed that give different answers to the questions posed by Schrödinger's cat of how long superpositions last and when (or whether) they collapse.
The experiment as described is a purely theoretical one, and the machine proposed is not known to have been constructed. However, successful experiments involving similar principles, e.g. superpositions of relatively large (by the standards of quantum physics) objects have been performed.[better source needed] These experiments do not show that a c...
In August 2020, physicists presented studies involving interpretations of quantum mechanics that are related to the Schrödinger's cat and Wigner's friend paradoxes, resulting in conclusions that challenge seemingly established assumptions about reality.
Einstein, Albert; Podolsky, Boris; Rosen, Nathan (15 May 1935). "Can Quantum-Mechanical Description of Physical Reality Be Considered Complete?". Physical Review. 47 (10): 777–780. Bibcode:1935PhRv...Leggett, Tony (August 2000). "New Life for Schrödinger's Cat" (PDF). Physics World. pp. 23–24. Retrieved 28 February 2020.An article on experiments with "cat state" superpositions in superconductin...Trimmer, John D. (1980). "The Present Situation in Quantum Mechanics: A Translation of Schrödinger's "Cat Paradox" Paper". Proceedings of the American Philosophical Society. 124 (5): 323–338. JSTOR...Yam, Phillip (October 9, 2012). "Bringing Schrödinger's Cat to Life". Scientific American. Retrieved 28 February 2020. A description of investigations of quantum "cat states" and wave function coll...Schrödinger's Cat - Sixty Symbols - a video published by the University of Nottingham.Jack Roosevelt Robinson (January 31, 1919 – October 24, 1972) was an American professional baseball player who became the first African American to play in Major League Baseball (MLB) in the modern era. Robinson broke the color line when he started at first base for the Brooklyn Dodgers on April 15, 1947. The Dodgers signing Robinson heralded ...
Damage. $1 billion. The 1992 Los Angeles riots (also called the South Central riots, Rodney King riots or the 1992 Los Angeles uprising [4] [5]) were a series of riots and civil disturbances that occurred in Los Angeles County, California, United States, during April and May 1992. Unrest began in South Central Los Angeles on April 29, after a ...
