{"id":89429,"date":"2018-11-09T17:51:34","date_gmt":"2018-11-09T22:51:34","guid":{"rendered":"http:\/\/rbach.net\/blog\/index.php\/"},"modified":"2021-02-05T15:44:07","modified_gmt":"2021-02-05T20:44:07","slug":"whats-superposition-and-entanglement","status":"publish","type":"post","link":"https:\/\/rbach.net\/index.php\/whats-superposition-and-entanglement\/","title":{"rendered":"What’s Superposition and Entanglement?"},"content":{"rendered":"

\"What's<\/a>Quantum computers<\/strong> can achieve\u00a0performance orders of magnitude faster<\/strong> than even today’s largest super computers<\/strong><\/a>.\u00a0Quantum computers<\/a> can outperform classical computers by exploiting the quantum mechanical principles of superposition<\/a><\/strong> and entanglement<\/strong><\/a>.<\/p>\n

It\u2019s only when you look at the tiniest quantum particles<\/a><\/strong> \u2013 atoms, electrons, photons and the like \u2013 that you’ve seen\u00a0these befuddling phenomena.\u00a0They are perplexing because we don\u2019t experience superposition and entanglement, in our day-to-day lives. They even challenged some of the greatest minds of the 20th century. Nobel prize-winning physicist Richard Feynman<\/a> said<\/a>, \u201cNobody understands quantum mechanics.<\/em>\u201d\u00a0Einstein<\/a> described quantum entanglement as \u201cspooky action at a distance.<\/em>\u201d<\/p>\n

Superposition and entanglement allow quantum computers to perform unprecedented amounts of parallelism<\/a>. <\/strong>They do not need the multiple replication of hardware\u00a0 required in a classical computer to do the same work.<\/p>\n

Quantum superposition<\/strong><\/span><\/h4>\n

\"Quantum<\/a>Quantum superposition is the phenomenon where a qubit<\/a> <\/strong>can exist in multiple states<\/strong> or places at the exact same time. <\/strong>Something can be \u201chere\u201d and \u201cthere,\u201d or \u201cup\u201d and \u201cdown\u201d at the same time.\u00a0The quantum superposition \u201cup\u201d and \u201cdown\u201d is lost<\/a> after a measurement. We are left with a particle in one known state. This doesn\u2019t make intuitive sense but it\u2019s one of the weird realities of quantum physics<\/a>.<\/p>\n

Quantum entanglement<\/strong> <\/span><\/h4>\n

\"Quantum<\/a>Quantum entanglement<\/strong> is an extremely strong correlation between quantum particles. <\/strong>It is so strong that actions performed on one affect the other, even if placed at opposite ends of the universe<\/strong>. This seemingly impossible connection inspired Einstein to describe entanglement as \u201cspooky action at a distance.<\/em>\u201d<\/p>\n

The transfer of state between quantum particles takes place at a speed of at least 10,000 times<\/a> the speed of light, possibly even instantaneously, regardless of distance.<\/p>\n

\"Live<\/a>
\nSource:LiveScience<\/a><\/p>\n

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