quantum entanglement
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enQuantum physics really is strange
http://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="http://plus.maths.org/content/quantum-physics-strange" target="_blank">read more</a></p>http://plus.maths.org/content/quantum-physics-strange#commentsmathematical realitygeneral relativityparticle spinquantum entanglementquantum mechanicsquantum physicsrelativityspeed of lightThu, 15 Nov 2012 11:07:43 +0000mf3445808 at http://plus.maths.org/contentA Nobel Prize for quantum optics
http://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="http://plus.maths.org/content/nobel-prize-quantum-optics" target="_blank">read more</a></p>http://plus.maths.org/content/nobel-prize-quantum-optics#commentsNobel prizequantum computingquantum entanglementquantum mechanicsquantum physicsquantum superpositionTue, 09 Oct 2012 12:54:31 +0000mf3445788 at http://plus.maths.org/contentSpooky action found in gases
http://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="http://plus.maths.org/content/spooky-action-gas" target="_blank">read more</a></p>http://plus.maths.org/content/spooky-action-gas#commentsmathematical realityparticle spinquantum entanglementquantum mechanicsMon, 12 Dec 2011 09:15:33 +0000mf3445602 at http://plus.maths.org/contentRandom, but not by accident
http://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="http://plus.maths.org/content/os/latestnews/jan-apr10/quantum/index" target="_blank">read more</a></p>http://plus.maths.org/content/os/latestnews/jan-apr10/quantum/index#commentsquantum cryptographyquantum entanglementrandomnessMon, 19 Apr 2010 23:00:00 +0000plusadmin5213 at http://plus.maths.org/contentCracking codes, part II
http://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="http://plus.maths.org/content/cracking-codes-part-ii" target="_blank">read more</a></p>http://plus.maths.org/content/cracking-codes-part-ii#comments35action at a distancecipherlocal realismquantum cryptographyquantum entanglementSat, 30 Apr 2005 23:00:00 +0000plusadmin2267 at http://plus.maths.org/contentWhy God plays dice
http://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="http://plus.maths.org/content/why-god-plays-dice" target="_blank">read more</a></p>http://plus.maths.org/content/why-god-plays-dice#commentsparticle spinprobabilityquantum entanglementMon, 31 Aug 1998 23:00:00 +0000plusadmin2696 at http://plus.maths.org/content