Quantum Entanglement inside & outside Event Horizon

[stglyde]

It is said nothing can escape the Event Horizon, not even light. How about an entangled pair that is inside the event horizon and outside it. Would they still be entangled such that they still form correlations?

 

[e.bar.goum]

30 Seconds of googling gives me

http://prl.aps.org/pdf/PRL/v95/i12/e120404
http://pra.aps.org/abstract/PRA/v81/i3/e032320
http://arxiv.org/ftp/quant-ph/papers/0604/0604007.pdf
http://prd.aps.org/abstract/PRD/v52/i8/p4512_1

I could go on.

Either way, you cannot get information out of a EPR type experiment anyway.

 

[tom.stoer]

yes, they are entangled, but there's no way to find out whether they are entangled or not based on experiments outside the horizon only; detecting entanglement requires non-local experiments, i.e. measuring both 'particles' and exchanging information regarding the results; this exchange is not possible in the presence of the event horizon, therefore we are not able to learn about the presence of a second particle inside the event horizon and whether the two 'particles' are entangled or not

an idea would be to try to understand this from the perspecive of an observer inside the event horizon; for this observer entanglement should be verifiable / falsifiable b/c he can receive information from the outside

 

[Demystifier]

yes, they are entangled, but there's no way to find out whether they are entangled or not;

Actually, there is. First measure the outside particle, and then jump into to black hole to measure the inside one. Of course, after the measurement you will crash into the black-hole singularity (or whatever sits in the black-hole center), but at least you will die happy knowing that the horizon does not destroy the correlations.

 

[tom.stoer]

Actually, there is. First measure the outside particle, and then jump into to black hole to measure the inside one. Of course, after the measurement you will crash into the black-hole singularity (or whatever sits in the black-hole center), but at least you will die happy knowing that the horizon does not destroy the correlations.

You are right; this is what I mean by

an idea would be to try to understand this from the perspecive of an observer inside the event horizon; for this observer entanglement should be verifiable / falsifiable b/c he can receive information from the outside

I corrected my post above

 

[Dale]

Actually, there is. First measure the outside particle, and then jump into to black hole to measure the inside one. Of course, after the measurement you will crash into the black-hole singularity (or whatever sits in the black-hole center), but at least you will die happy knowing that the horizon does not destroy the correlations.

I imagine that the impact factor of the resulting manuscript would be rather low, even if you took some peer-reviewers along with you.

 

[tom.stoer]

I imagine that the impact factor of the resulting manuscript would be rather low, even if you took some peer-reviewers along with you.

In order to get the paper written and peer-reviewed before spaghettification the black hole has to be rather large

 

[Demystifier]

I imagine that the impact factor of the resulting manuscript would be rather low, even if you took some peer-reviewers along with you.

Unless you use superluminal neutrinos to send information OUT of the black hole.

 

[Demystifier]

In order to get the paper written and peer-reviewed before spaghettification the black hole has to be rather large

I believe the black hole in the center of our galaxy would be large enough.

 

[tom.stoer]

I have to check the formulas for free-fall starting at the event horizon; peer review could be OK but 'publication' becomes rather obscure ;-)

 

[Randomguy]

In order to get the paper written and peer-reviewed before spaghettification the black hole has to be rather large

And even still, I hear the tidal forces inside will tear you apart pretty rapidly.

That said, don't take my word for it, my mate told me. Presumably he went there over the summer or something.EDIT: Wait, they'd probably squish you actually, wouldn't they?