quantum entanglement
https://plus.maths.org/content/taxonomy/term/729
enA ridiculously short introduction to some very basic quantum mechanics
https://plus.maths.org/content/ridiculously-brief-introduction-quantum-mechanics
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Mariane Freiberger </div>
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<p>Some general ideas in very few words and without equations.</p>
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<div class="rightshoutout">"I think I can safely say that nobody understands quantum mechanics."</br>
Richard Feynman.</div>
<p>Quantum mechanics was developed in just two years, 1925 and
1926 (see <a href="https://plus.maths.org/content/why-quantum-mechanics">here</a> if you want to know why). There were initially two versions, one formulated by <a href="http://www-groups.dcs.st-and.ac.uk/~history/Biographies/Heisenberg.html">Werner
Heisenberg</a> and one by <a href="http://www-groups.dcs.st-and.ac.uk/~history/Biographies/Schrodinger.html">Erwin Schrödinger</a>. The two tuned out to be
equivalent.<p><a href="https://plus.maths.org/content/ridiculously-brief-introduction-quantum-mechanics" target="_blank">read more</a></p>https://plus.maths.org/content/ridiculously-brief-introduction-quantum-mechanics#commentsFP-belowquantum entanglementquantum mechanicsquantum physicsquantum superpositionquantum tunnelingSchrödinger equationThu, 19 May 2016 13:11:20 +0000mf3446567 at https://plus.maths.org/contentHow does quantum computing work?
https://plus.maths.org/content/how-does-quantum-commuting-work
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Marianne Freiberger </div>
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<p>Here's a brief introduction to the possible future of computing.</p>
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<p><em>This article is part of our <a href="https://plus.maths.org/content/information-about-information">Information about information project</a>, run <a href="https://plus.maths.org/content/information-about-information#fqxi">in collaboration with FQXi</a>. Click <a href="https://plus.maths.org/content/what-quantum-computing">here</a> to read other articles on quantum computing. </em></p><p><a href="https://plus.maths.org/content/how-does-quantum-commuting-work" target="_blank">read more</a></p>https://plus.maths.org/content/how-does-quantum-commuting-work#commentscomputer scienceinformation about informationquantum computingquantum entanglementquantum informationquantum mechanicsquantum superpositionUniversity of CambridgeThu, 01 Oct 2015 10:27:10 +0000mf3446387 at https://plus.maths.org/contentQuantum physics really is strange
https://plus.maths.org/content/quantum-physics-strange
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<p>A team of physicists have curbed the hope that quantum physics might be squared with common sense. At least if we want to hang on to Einstein's highly respected theory of relativity. Their result concerns what Einstein called "spooky action at a distance" and it may soon be possible to test their prediction in the lab.</p>
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A team of physicists have curbed the hope that quantum physics might be squared with common sense. At least if we want to hang on to Einstein's highly respected theory of relativity. Their result concerns what Einstein called "spooky action at a distance" and it may soon be possible to test their prediction in the lab. </p><p><a href="https://plus.maths.org/content/quantum-physics-strange" target="_blank">read more</a></p>https://plus.maths.org/content/quantum-physics-strange#commentsmathematical realitygeneral relativityparticle spinquantum entanglementquantum mechanicsquantum physicsrelativityspeed of lightThu, 15 Nov 2012 11:07:43 +0000mf3445808 at https://plus.maths.org/contentA Nobel Prize for quantum optics
https://plus.maths.org/content/nobel-prize-quantum-optics
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<p>The 2012 Nobel Prize for Physics has been awarded to Serge Haroche and David J. Wineland for ground-breaking work in quantum optics. By probing the world at the smallest scales they've shed light on some of the biggest mysteries of physics and paved the way for quantum computers and super accurate clocks.</p>
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<p>Quantum mechanics predicts the bizarrest things. Tiny particles
like electrons can simultaneously be in two
places, or, more generally, in two states that would seem mutually
exclusive in our everyday experience of physics. Similarly weirdly,
particles that have once interacted can remain <em>entangled</em> even
when they're moved far apart and then
influence each other instantaneously, something which Einstein called "spooky action
at a distance".<p><a href="https://plus.maths.org/content/nobel-prize-quantum-optics" target="_blank">read more</a></p>https://plus.maths.org/content/nobel-prize-quantum-optics#commentsNobel prizequantum computingquantum entanglementquantum mechanicsquantum physicsquantum superpositionTue, 09 Oct 2012 12:54:31 +0000mf3445788 at https://plus.maths.org/contentSpooky action found in gases
https://plus.maths.org/content/spooky-action-gas
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Researchers in Germany have created a rare example
of a weird phenomenon predicted by quantum mechanics:
<em>quantum entanglement</em>, or as Einstein called it, "spooky action at a
distance". The idea, loosely speaking, is that particles which have
once interacted physically remain linked to each other even when they're
moved apart and seem to affect each other instantaneously. </div>
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<p>Researchers in Germany have created a rare example
of a weird phenomenon predicted by quantum mechanics:
<em>quantum entanglement</em>, or as Einstein called it, "spooky action at a
distance". The idea, loosely speaking, is that particles which have
once interacted physically remain linked to each other even when they're
moved apart and seem to affect each other instantaneously.</p><p><a href="https://plus.maths.org/content/spooky-action-gas" target="_blank">read more</a></p>https://plus.maths.org/content/spooky-action-gas#commentsmathematical realityparticle spinquantum entanglementquantum mechanicsMon, 12 Dec 2011 09:15:33 +0000mf3445602 at https://plus.maths.org/contentRandom, but not by accident
https://plus.maths.org/content/os/latestnews/jan-apr10/quantum/index
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<p>Researchers from the University of Maryland have devised a new kind of random number generator that is cryptographically secure, inherently private and — most importantly — certified random by the laws of physics. Randomness is important, particularly in the age of the Internet, because it guarantees security. Valuable data and messages can be encrypted using long strings of random numbers to act as "keys", which encode and decode the information. Randomness implies unpredictability, so if the key is truly random, it's next to impossible for an outsider to guess it.</p>
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<p>Researchers from the University of Maryland have devised a new kind of random number generator that is cryptographically secure, inherently private and — most importantly — certified random by the laws of physics.</p><p><a href="https://plus.maths.org/content/os/latestnews/jan-apr10/quantum/index" target="_blank">read more</a></p>https://plus.maths.org/content/os/latestnews/jan-apr10/quantum/index#commentsquantum cryptographyquantum entanglementrandomnessMon, 19 Apr 2010 23:00:00 +0000plusadmin5213 at https://plus.maths.org/contentCracking codes, part II
https://plus.maths.org/content/cracking-codes-part-ii
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Artur Eker </div>
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In the second of two articles, <b>Artur Ekert</b> visits the strange subatomic world and investigates the possibility of unbreakable quantum cryptography. </div>
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<div class="pub_date">May 2005</div>
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<p><i>In <a href="/issue34/features/ekert/index.html">Cracking codes, part I</a> in the previous issue of Plus, we saw how the desire to communicate secretly has inspired human ingenuity to create intricate ciphers - and how the desire to learn others' secrets led to those ciphers being broken. We now leave mathematics, and enter the world of quantum physics for an introduction to the
peculiar phenomenon of quantum correlation - a phenomenon that evades all common explanations.</i></p><p><a href="https://plus.maths.org/content/cracking-codes-part-ii" target="_blank">read more</a></p>https://plus.maths.org/content/cracking-codes-part-ii#comments35action at a distancecipherlocal realismquantum cryptographyquantum entanglementSat, 30 Apr 2005 23:00:00 +0000plusadmin2267 at https://plus.maths.org/contentWhy God plays dice
https://plus.maths.org/content/why-god-plays-dice
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<p>"<em>God does not play dice</em>" Albert Einstein once said. Since then the undisputable successes of the quantum theory have convinced all but a handful of contemporary physicists that God does indeed play dice. The question some are now asking is <em>why</em> does God play dice?</p>
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<div class="pub_date">September 1998</div>
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<p>"<em>God does not play dice</em>" Albert Einstein once said, expressing his contempt for the notion that the universe is governed by probability - an idea fundamental to quantum theory (see "<a href="/issue5/qm1/index.html">Quantum uncertainty</a>" in Issue No 5). Since then the undisputable successes of the quantum theory have convinced all but a handful of contemporary physicists
that God does indeed play dice.<p><a href="https://plus.maths.org/content/why-god-plays-dice" target="_blank">read more</a></p>https://plus.maths.org/content/why-god-plays-dice#commentsparticle spinprobabilityquantum entanglementMon, 31 Aug 1998 23:00:00 +0000plusadmin2696 at https://plus.maths.org/content