{"page":"\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/resources-572d6a42.css\" /\u003e\n\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/lp_boclips_stylesheets-f4d0de30.css\" media=\"all\" /\u003e\n\u003cdiv data-title='Quantum Entanglement Explained: How It Really Works' data-url='/boclips/videos/689566f48b3f8d9d4df8e34b' data-video-url='/boclips/videos/689566f48b3f8d9d4df8e34b' id='bo_player_modal'\u003e\n\u003cdiv class='boclips-resource-page modal-dialog panel-container'\u003e\n\u003cdiv class='react-notifications-root'\u003e\u003c/div\u003e\n\u003cdiv class='rp-header'\u003e\n\u003cdiv class='rp-type'\u003e\n\u003ci aria-hidden='true' class='fai fa-regular fa-circle-play'\u003e\u003c/i\u003e\nVideo\n\u003c/div\u003e\n\u003ch1 class='rp-title' id='video-title'\u003e\nQuantum Entanglement Explained: How It Really Works\n\u003c/h1\u003e\n\u003cdiv class='rp-actions'\u003e\n\u003cdiv class='mr-1'\u003e\n\u003ca class=\"btn btn-success\" data-posthog-event=\"Signup: LP Signup Activity\" data-posthog-location=\"body_link_boclips\" data-remote=\"true\" href=\"/subscription/new\"\u003e\u003cspan\u003e\u003cspan\u003eGet Free Access\u003c/span\u003e\u003cspan class=\"\"\u003e for 10 Days\u003c/span\u003e\u003cspan\u003e!\u003c/span\u003e\u003c/span\u003e\u003c/a\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-body'\u003e\n\u003cdiv class='rp-info'\u003e\n\u003cdiv aria-label='Hide resource details' class='rp-hide-info' role='button' tabindex='0'\u003e\u0026times;\u003c/div\u003e\n\u003ci aria-label='Expand resource details' class='rp-expand-info fai fa-solid fa-up-right-and-down-left-from-center' role='button' tabindex='0'\u003e\u003c/i\u003e\n\u003ci aria-label='Compress resource details' class='rp-compress-info fai fa-solid fa-down-left-and-up-right-to-center' role='button' tabindex='0'\u003e\u003c/i\u003e\n\u003cdiv class='rp-rating'\u003e\n\u003cspan class='resource-pool'\u003e\n\u003cspan class='pool-label'\u003ePublisher:\u003c/span\u003e\n\u003cspan class='pool-name'\u003e\n\u003cspan class='text'\u003e\u003ca data-publisher-id=\"30356011\" href=\"/search?publisher_ids%5B%5D=30356011\"\u003eCurated Video\u003c/a\u003e\u003c/span\u003e\n\u003c/span\u003e\n\u003c/span\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-description'\u003e\n\u003cspan class='short-description'\u003eSummary:Albert Einstein described Entanglement as “spooky action at a distance,” where doing something to one of a But it's not spooky action at a distance, at all. So what is entanglement? Electrons have a quantum property called spin...\u003c/span\u003e\n\u003cspan class='full-description hide'\u003eSummary:\u003cbr/\u003eAlbert Einstein described Entanglement as “spooky action at a distance,” where doing something to one of a But it's not spooky action at a distance, at all. So what is entanglement? \u003cbr/\u003e\u003cbr/\u003eElectrons have a quantum property called spin that makes them act like little magnets. We’ll always measure it pointing in one direction or the opposite: up or down, say. If we entangle two electrons so that their spins are always pointing in opposite directions, the two spins are said to be correlated. If we entangle the two electrons in this way – and fire them in opposite directions, we don’t know which one of the pair is up and which one is down until we make a measurement. If we find that electron 1 is spin up. We know the spin of electron 2 must be down. \u003cbr/\u003e\u003cbr/\u003eWhy isn't this like a pair of gloves? The handedness of the gloves is there from the start. It never changes. With entangled particles that’s not the case. They are in a superposition. Prior to measurement, there is no definite answer.\u003cbr/\u003e\u003cbr/\u003eHow do we know superposition is real? The double slit experiment is good evidence. Entangled particles are stranger, because a measurement on one particle determines the outcome for both of them. \u003cbr/\u003e\u003cbr/\u003eAlbert Einstein thought up an experiment like this in 1935, in collaboration with two younger scientists, Boris Podolsky and Nathan Rosen. They are referred to as EPR for short. They believed superposition was impossible because information cannot travel instantaneously. So they thought there must be hidden variables. But Danish physicist Niels Bohr, said that Einstein was just wrong. \u003cbr/\u003e\u003cbr/\u003eScientists remained divided. in 1964, Irish physicist John Bell figured out how to set up an experiment, Bell's inequality, to determine who was right. Bell proved that quantum mechanics predicted stronger statistical correlations in the outcomes of  some measurements than any hidden variable theory could. \u003cbr/\u003e\u003cbr/\u003eWhen Bell’s experiment was first done in a lab in the 1970’s by physicists John Clauser and Stuart Freedman at the University of California Berkeley, it showed that there was no sign of hidden variables.\u003cbr/\u003e\u003cbr/\u003eHow are two particles entangled? You can entangle two photons from birth or you can bring two quantum objects very close together. \u003cbr/\u003e\u003cbr/\u003eOnce objects are entangled, they’re not separate. They are, really two parts of a single object. In quantum mechanics, objects are described by wave functions: mathematical expressions that encapsulate all that can be said about the object. This wave function can be spread out in space. This is why particles can act as if they are waves. But if we entangle two particles, they are then described by a single wave function. They are mathematically the same object. \u003cbr/\u003e\u003cbr/\u003eEntanglement tells us is that the quantum world has nonlocality: things at one place don’t depend just on what happens in the neighborhood of that place, as they do in the classical world. Quantum non locality is an alternative to spooky action at a distance. \u003cbr/\u003e#Entanglement\u003cbr/\u003e#quantumentanglement\u003cbr/\u003eIt will not let us communicate faster than light because only knowing how they are correlated can provide any meaningful information. This has to be transmitted at the speed of light. \u003cbr/\u003e\u003cbr/\u003eThe advantage to using entangled particles to send messages is you can encrypt the message in a way that it can never be intercepted and decrypted without that decryption being detected. 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