, upon which they certainly show the same (random) side up?
A revolving dice, unless stopped, you cannot know which side it will show up; what is said above seems to tells us that measurement can decide how the dice will stop and which side will show up. Aha! two relvoving dices, whether one measure them or not, will finally randomly stop and no way you can tell which sides they will turn out to be, regardless measurement.
Context:
Entangled States
According to the Austrian physicist Erwin Schrödinger, entanglement is the characteristic trait of quantum mechanics. In addition to its crucial role for the foundations of physics, entanglement is also a key resource for upcoming quantum information technologies such as quantum cryptography and quantum computation. Entangled particles exhibit correlations which are stronger and more intricate than those allowed by the laws of classical physics. If two particles are in an entangled quantum state, they have perfectly defined joint properties at the expense of losing their individual properties. This is like having two dice which have no orientation until they are subject to measurement, upon which they certainly show the same (random) side up. In contrast, so-called separable quantum states allow for a classical description, because every particle has well-defined properties on its own. Two dice, each one of them with its own well-defined orientation, are in a separable state. Now, one would think that at least the nature of the quantum state must be an objective fact of reality. Either the dice are entangled or not. Zeilinger's team has now demonstrated in an experiment that this is not always the case.
Top answer
NL888 This is like having two dice which have no orientation until they are subject to measurement, upon which they certainly show the same (random) side up. This is like having two dice ... = This is the same thing that would happen IF you had two dice with this (strange) property: which have no orientation ~ the dice have not yet landed on the table; they are still tossing about in the air in a random fashion until they are subject to measurement ~ but you can "measure" them by magically forcing them to land on the table any time you want upon which = and at that time ~ at the time you choose to "measure" them ~ at the time they land (by your command) they certainly show the same (random) side up ~ both dice show the same number, and a different number (1 - 6) comes up (as if randomly selected) every time you try this experiment.
- NL888 This is like having two dice which have no orientation until they are subject to measurement, upon which they certainly show the same (random) side up.
- This is like having two dice ...
- = This is the same thing that would happen IF you had two dice with this (strange) property: which have no orientation ~ the dice have not yet landed on the table; they are still tossing about in the air in a random fashion until they are subject to measurement ~ but you can "measure" them by magically forcing them to land on the table any time you want upon which = and at that time ~ at the time you choose to "measure" them ~ at the time they land (by your command) they certainly show the same (random) side up ~ both dice show the same number, and a different number (1 - 6) comes up (as if randomly selected) every time you try this experiment.
- ________________ The sentence is meant to illustrate that "entanglement" is such a strange phenomena in the world of the atomic particles of quantum physics, that if you had to describe it as something in the real world, you would need to describe something so magical that it seems impossible that it could happen.
- NL888 Aha!
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NL888This is like having two dice which have no orientation until they are subject to measurement, upon which they certainly show the same (random) side up.This is like having two dice ... = This is the same thing that would happen IF you had two dice with this (strange) property:
which have no orientation ~ the dice have not yet
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