Quantum gravity: The most exciting discovery in physics could come about thanks to telecoms satellit

aeon ^ | 11/11/14 | Sidney Perkowitz

[gorush]

There are only 10 types of people in this world...those who understand binary and those who don't.

[Wuli]

too many science writers know nothing of how to cut down some of the forest so the tree can be seen

sometimes too much explanation is not better “science” it’s just failure to get straight to the point

[brothers4thID]

marking for later.

[Springfield Reformer]

Ping for later

[RandallFlagg]

Entanglement has been tested up to a distance of 143 km, by Anton Zeilinger at the University of Vienna.
In 2012, Zeilinger’s former student Jian-Wei Pan, who heads the USTC quantum satellite effort, achieved entanglement over distances nearly as large.
And then, in an important ‘proof of principle’ demonstration in 2013, he managed to transmit photon qubits 800 km from a ground station to an orbiting German satellite and back.
Results like these start to make quantum research in space look very doable.

Yeah, sure.

Then, the next thing you know....

We'll have THESE guys taking over our planet!!

[Bratch]

[Chainmail]

Physics ping.

[etl lll]

What we don’t yet know is what happens to quantum phenomena over long distances. In short, we haven’t tried to do quantum experiments where relativity gets in the way. Yet.

What about the quantum phenomenon of what Einstein mockingly called "spooky action at a distance?" aka, EPR Paradox, Belles Theorem, non-locality, where a measurement on one particle of an entangled pair affects the other instaneously over artibitrarily long distances of space, in theory, across billions of light years.

[brothers4thID]

marking for later.

[etl lll]

Oops. Posted before reading entire article.

[Tijeras_Slim]

That’s a time honored FR tradition.

[Billthedrill]

Everything is binary.

Well, either everything is binary...or it isn't.

[etl lll]

0 it is, 1 it isn’t.

[MHGinTN]

“Nothing can be shorter than the Planck length.” So, his math cut a very short planck ... measure twice cut once. {No thing shorter because of dimension space restriction ... without time events do not occur and without space things do not exist.}

[ForYourChildren]

This references two of the most important events in quantum physics. And now, you too, can get your copies of these events.

1. Einstein, A; B Podolsky; N Rosen (1935-05-15). "Can Quantum-Mechanical Description of Physical Reality be Considered Complete?". Physical Review 47 (10): 777–780. Bibcode:1935PhRv...47..777E. doi:10.1103/PhysRev.47.777. 

2. Bell, John. On the Einstein–Poldolsky–Rosen paradox, Physics 1 3, 195-200, Nov. 1964

[SunkenCiv]

Thanks left that other site.

---

---

· List topics · post a topic · subscribe · Google ·

---

[SunkenCiv]

String Theory and Loop Quantum Gravity
By Andrew Zimmerman Jones and Daniel Robbins from String Theory For Dummies
http://www.dummies.com/how-to/content/string-theory-and-loop-quantum-gravity.html

[M Kehoe]

Wax on, wax off. 😊 5.56mm

[M Kehoe]

Welcome to FR.

5.56mm

[etl lll]

Thanks, but I’ve been here before.