The Danish media reported that it has the explosive potential of a first generation nuke.

Solid matter physics would be a more straightforward name - it’s just the physics of matter that isn’t liquid or gas, which usually means crystals.

How is that?

From its own cover,

It is written by experimental physicists and aimed to provide the interested amateur with a bridge from undergraduate physics to quantum field theory. The imagined reader is a gifted amateur possessing a curious and adaptable mind looking to be told an entertaining and intellectually stimulating story, but who will not feel patronized if a few mathematical niceties are spelled out in detail.

This might sound pretty casual, but it gets into all the math of it, with an aim at practical use.

The book “Quantum field theory for the gifted amateur” is really good. It’s helped me understand quantum fields a lot better, and I work with quantum mechanics every day.

What a horrifying disaster.

Not sure I understand, who is being called names?

And sure, laws like these are always a compromise, with no objectively true answer.

Corrected.

The point of having an age of consent (in this case 16 in the UK) is not popularity, and not just parental awareness or protection from people in positions of power.

It’s a decision by society that kids below this age are incapable of grasping the full consequences of their consent.

Of course the limit is going to be somewhat arbitrary, and you can definitely argue that age of consent laws are bad without being a creep, but you’d have to argue that a 15 year old understands the ramifications of consent.

The UN is more a place to talk with your enemies than with your friends, and getting the chance to sit at a table with people you disagree with rather than fighting each other is great.

If there are any Palestinians left to disagree with.

Sorry about your issues, I never meant to diminish them. I was genuinely curious about how one can become so limited in ones protein intake, but clearly worded my question poorly.

Thanks, I’ll try to be mindful of that! English isn’t my first language, so there is surely some nuance to be learned.

Thanks, hadn’t heard about that before.

Sorry, I was trying to ask a genuine question, I didn’t mean to come across in a negative way.

I’d still be very interested in the answer.

I’m not able to obtain enough protein without meat

How does that work? Isn’t egg white pure protein? Surely eating a pile of boiled eggs would give you the same amount of protein as a steak, not counting stuff like cheese and legumes.

Original from Perry Bible Fellowship: https://pbfcomics.com/comics/one-more-day/

Weird that the text was re-written, I wonder if the comic was somehow translated and translated back to English?

The “message” does not have any local effect on reality - when you measure your particle, you have no way of figuring out if its partner was already measured elsewhere. The effect it does have is on the global state, maintaining the correlation that was encoded from the start.

If you write up the density matrix for the system before and after measurement of one of the particles, you can see that while the density matrix changes, it does not change in a way one can measure.

What I will concede is that before the first measurement the global state is |00>+|11>, afterwards it is |00> or |11>. This projection appears to happen instantaneously, no matter the distance, which is indeed faster than light.

But calling the wave function collapse a signal or a message or a transfer of information is misleading, I would say. In your example, we know that the initial state is |00>+|11>, and that the result of the first measurement is then, say, 1. Then no further information is required to know that the other measurement will result in 1. No messages required, no hidden variables, simply the process of elimination.

I would like to say that this is indeed a confusing subject, but that the math is clear, and that I am arguing what is my impression of the mainstream view in the field.

I fully understand the concept of entanglement and the experiments you mention, but I’m still to understand what you mean when you say “something” is being transmitted between the particles.

As you say, this “something” cannot contain information, and it also cannot influence the particle physically, since there is no way to distinguish the physical state of the particle before and after it receives this “something”. So the signal contains nothing, and has no effect on physical reality. That sounds a lot like “nothing” rather than “something”.

I completely get the argument that somehow the two particles must agree on what result to give, but in the theory this is just a consequence of how entanglement and measurements work. No transmission required.

Indeed. I’m not completely sure what point you are trying to make, but my point is not a hidden variable point. The states can be in a perfectly correlated superposition without any hidden variables, and still not “share anything” upon collapse into an eigenstate.

I will concede that it looks a lot like one particle somehow tells the other “hey, I just collapsed into the |1> state, so now you need to as well”, but at a closer look this seems to happen on its own without any such message being shared. In particular, while the collapse of one state causes the collapse of the other, there is no physical way to distinguish between a state that was collapsed due to entanglement, and one that wasn’t. At least not until you send a sub-FTL signal to explain what happened.

So if physically, the state of particle 1 before and after particle 2 was measured is indistinguishable, how can we say that “something” was shared from particle 2 to particle 1?

I’m not sure what you mean. If something is “shared”, but this something contains no information, how can we know that it was shared? In what sense does this something even exist?

The perfect correlation of entangled particles is well established, and very cool, but perfect correlation does not require sharing of “something”. The perfect correlation is baked into the system from the start, from local interactions only.