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Author Topic: Can entanglement be maintained at astronomical distances?  (Read 795 times)

Offline David Reichard

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If particles or groups of matter become entangled,with some of them being emitted at high speed into the universe,can that entanglement be maintained across thousands of light years?


 

Offline Atkhenaken

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Re: Can entanglement be maintained at astronomical distances?
« Reply #1 on: 11/09/2016 15:47:18 »
If particles or groups of matter become entangled,with some of them being emitted at high speed into the universe,can that entanglement be maintained across thousands of light years?

Entanglement and Quantum Non-locality Demystified

Marian Kupczynski

Quantum nonlocality is presented often as the most remarkable and inexplicable phenomenon known to modern science which was confirmed in the experiments proving the violation of Bell Inequalities (BI). It has been known already for a long time that the probabilistic models used to prove BI for spin polarization correlation experiments (SPCE) are incompatible with the experimental protocols of SPCE. In particular these models use a common probability space together with joint probability distributions for various incompatible coincidence experiments and/or conditional independence (Bell's locality). Strangely enough these results are not known or simply neglected. Therefore so called Bell's or quantum nonlocality has nothing to do with the common notion of the non-locality and it should be rather called quantum non-Kolmogorovness or quantum contextuality. We quickly explain the true meaning of various Bell's locality assumptions and show that if local variables describing the measuring instruments are correctly taken into consideration then BI can no longer be proven. In order to demystify even further the entanglement and quantum long range correlations we give an example of a macroscopic entangled "two qubit state". Namely we show that one can prepare two macroscopic systems in such a way that simple realizable local experiments on these systems violate BI. Of course we do not question the usefulness of the long range correlations characterizing the entangled physical systems in the domain of Quantum Information. However one should not forget that the anti-correlations cannot be perfect, that the wave function should not be treated as an attribute of the individual quantum system which can be change instantaneously and that the unperformed experiments have no results.
 

Offline tkadm30

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Re: Can entanglement be maintained at astronomical distances?
« Reply #2 on: 11/09/2016 19:52:43 »
Does the biological utilization of quantum nonlocality exist?

If so, I assume that humans have the capacity to transfer neural energy from one human brain to another using synaptic hypercomputation.

See: http://www.thenakedscientists.com/forum/index.php?topic=66015.0
 

Offline David Reichard

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Re: Can entanglement be maintained at astronomical distances?
« Reply #3 on: 12/09/2016 07:25:57 »
There are other reported instances of Biological systems' use of quantum phenomena,such as in photosynthesis.I intuit that the difficulty with demonstrating mind to mind influence is related to the problems commonly encountered in working with quantum systems.Collapse might occur,and different parts of the brain working at a particular time are not always evident.That is complicated by the fact that the things we are  aware of are almost always slightly in the past,not the present.I was basically asking,IF 2minds,or matter groups,were to become entangled,how far apart could that be maintained?
 

Offline David Reichard

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Re: Can entanglement be maintained at astronomical distances?
« Reply #4 on: 12/09/2016 07:46:38 »
Do individual experiences,apocryphal in nature,qualify for discussion in this forum?I mention one only in relation to my previous post concerning mind to mind(or brain to brain) contact.I am quite satisfied that while I was in an Alpha brain state,I purposely made someone stutter while they were reading out loud.This was done by exercising a brief mental intent,and the result followed immediately.To be verified,both brains would probably have to be undergoing sensing scans,and I don't know if that measurement would disturb the effect.Thus,I can offer no proof unless someone more knowledgeable can design a proper experiment.
 

Offline evan_au

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Re: Can entanglement be maintained at astronomical distances?
« Reply #5 on: 12/09/2016 12:15:09 »
Quote from: David Reichard
Can entanglement be maintained at astronomical distances?
In theory, yes.
In practice, very difficult - the smallest interaction with a grain of dust, a molecule of gas or random light or heat could disturb an entangled quantum state.

The Chinese recently launched a satellite that generates pairs of entangled photons, which could be used to support quantum encryption. But:
- the rate of generating entangled photons is low
- the entangled photons are mixed in with a lot of non-entangled photons
- the light beam spreads out enormously as it passes through the atmosphere, so it is hard to collect the pairs of entangled photons
- many of the entangled photons are disturbed while passing through 100km of atmosphere
- it is blocked by clouds, fog or rain (or the satellite being invisible, over the horizon)

See: http://www.nature.com/news/chinese-satellite-is-one-giant-step-for-the-quantum-internet-1.20329
 
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Re: Can entanglement be maintained at astronomical distances?
« Reply #5 on: 12/09/2016 12:15:09 »

 

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