Rotating curved spacetime signatures from a giant quantum vortex

[MamboDervish]

This kind of thing makes me wish I spoke mathematics, the true language of reality.

But then I see this and wonder how many decades of study it'd take to get there....

x n + 1 = r x n ( x n − 1 )

Looks simple enough, no?

It's a fundamental formula for chaos.

 

[bomberfox]

This kind of thing makes me wish I spoke mathematics, the true language of reality.

But then I see this and wonder how many decades of study it'd take to get there....

View attachment 67504081

Looks like theres a good bit of integral calculus i learned in college but yeah its beyond calc 3

 

[bomberfox]

Can nobody still tell me what multiply quantized vortices are?

 

[NWRatCon]

Just when you thought it was safe to go back to the lab...

Scientists created a black hole in lab to test a theory, then it started glowing extremely bright (Good)​

 

[Lisa]

If you're fluent in this stuff you're way above my head.
Seriously...my father was a world renowned nuclear physicist and yet, when I try to parse any of what you just put down, I might as well try to translate Klingon into Ancient Sanskrit.

Ive read it 4 times and I a still just as confused. This is far above my knowledge and understanding of physics. Quantum physics is too weird for me.

 

[bomberfox]

Just when you thought it was safe to go back to the lab...

Scientists created a black hole in lab to test a theory, then it started glowing extremely bright (Good)​

Cool but ahhhh can ya tell us what multiply quantized vortices are?

 

[NWRatCon]

Cool but ahhhh can ya tell us what multiply quantized vortices are?

Oh, you mean like in Bose-Einstein condensates? If so, then no.

(But I am reading about them now.)

 

[NWRatCon]

"A striking property of quantum fluids (superfluid helium, atomic Bose-Einstein condensates, polariton condensates, etc.) is that the circulation of the velocity v around a closed path C is quantized [1] in units of κ = 2πh¯/M,Cv · dr = κ, (1) where M is the boson’s mass, ¯h is the reduced Planck’s constant, and the integer is called the winding number. In most regions of fluid the circulation will be zero, but there maybe points [two-dimensional (2D)] or lines [three-dimensional(3D)] where the wave function vanishes; hence, its phase is not defined, and = 0. Such topological defects (singularities), normally surrounded by circular (2D) or tubular(3D) regions of depleted density, are called quantum vortices. The topological nature of these vortices deeply affects the possible flow patterns (vortex lattices, turbulence, etc.[2–4]).
...." Sorry, some of the characters don't translate...

Dang, my Greek is just not up to snuff.

But, a true story: I went to a lecture about Bose-Einstein condensates with my elder son (who is truly a genius and loves physics). The speaker was explaining the process they used to bring the temperature down to near absolute zero by manipulating atoms with lasers, so as to create the condensate state (which is essentially a super-solid). My son, who was at the time about 12, piped up and asked a question in the middle of the lecture - 12-year-olds do that kinda thing, no filter - that blew both me and the lecturer away. What was great was how the lecturer (whose name I cannot now recall), wasn't phased at all, but genuinely excited that he was not only following along, but understood it well enough to pose the question, and then he came down afterward to explain the process to him personally. It is still one of my favorite memories of his childhood.

 

[NWRatCon]

Can nobody still tell me what multiply quantized vortices are?

Here's a good question for people: How many known states of matter are there?

 

[MamboDervish]

Here's a good question for people: How many known states of matter are there?

5
I have worked with 4.

 

[Gaius46]

Rotating curved spacetime signatures from a giant quantum vortex (Nature)​

If the title alone doesn't make your head explode, read on.

"Gravity simulators1 are laboratory systems in which small excitations such as sound2 or surface waves3,4 behave as fields propagating on a curved spacetime geometry. The analogy between gravity and fluids requires vanishing viscosity2,3,4, a feature naturally realized in superfluids such as liquid helium or cold atomic clouds5,6,7,8. Such systems have been successful in verifying key predictions of quantum field theory in curved spacetime7,8,9,10,11. In particular, quantum simulations of rotating curved spacetimes indicative of astrophysical black holes require the realization of an extensive vortex flow12 in superfluid systems. Here we demonstrate that, despite the inherent instability of multiply quantized vortices13,14, a stationary giant quantum vortex can be stabilized in superfluid 4He."

As if I needed a ****ing headache this early on a Sunday morning.

My daughter is a microbiologist and got an authorship on a paper as an undergrad. Had to do with something about cells in the flagella of some tiny organism and how said cells react to stuff in the environment. I asked for a copy so I could read it. That was a mistake. I had to look up every other word and eventually told her "tell me what this means in small words."

 

[NWRatCon]

5
I have worked with 4.

You're short a few. It blew my mind.

And yes, he's is literally speaking a different language....

 

[NWRatCon]

As if I needed a ****ing headache this early on a Sunday morning.

My daughter is a microbiologist and got an authorship on a paper as an undergrad. Had to do with something about cells in the flagella of some tiny organism and how said cells react to stuff in the environment. I asked for a copy so I could read it. That was a mistake. I had to look up every other word and eventually told her "tell me what this means in small words."

I feel this way often. Especially when someone is explaining quantum mechanics.

 

[NWRatCon]

You're short a few. It blew my mind.

This is actually the one I intended to link.

 

[NWRatCon]

"There are more things in Heaven and Earth, Horatio, than are dreamt of in your philosophy" - Hamlet.

This is how I feel whenever I explore something so far beyond my ken. I feel like I'm glimpsing it through a glass darkly. The concepts of quantum physics tend to break me, but I know enough to know that I don't know enough. That's why I enjoy sharing them. I don't speak Greek, but I enjoy hearing it spoken, and even better if someone translate it for me.

Neil Degrasse Tyson, like Carl Sagan and Bill Nye, is a great science science explainer. He does a series of podcasts that touch on these subjects.

 

[medi]

My introduction to physics was done in a kind of sneaky way when I was quite young and it was because of the influence of aviation, as we had a number of family folks in that business. And then I remember that my curiosity kicked in when I learned from a lecture from an uncle about gravity not being the same around the planet. I remember that for some reason that made no sense to me and I wanted to get a better grasp of why that was the case. And then the studying just kept right on going. Trouble was my active duty years brought all that to a screeching halt. Just staying alive can suddenly take a whole lot of effort, both physically and emotionally.

 

[Gaius46]

I feel this way often. Especially when someone is explaining quantum mechanics.

Richard Feynman is supposed to have said "If you think you understand quantum mechanics you don't understand quantum mechanics."

 

[NWRatCon]

Because I like sharing interesting things...

 

[soap box]

You're short a few. It blew my mind.

And yes, he's is literally speaking a different language....

Hey! He didn't include play-dough! And whatabout jello!!

 

[NWRatCon]

Richard Feynman is supposed to have said "If you think you understand quantum mechanics you don't understand quantum mechanics."

Have you read, "The Quark and the Jaguar" by Murray Gell-Mann? It really makes physicists human, even though it is a book about simplicity and complexity. What I really love is exploring the connections between disciplines - quantum physics, cosmology and biology, for example, none of which I really understand.

 

[NWRatCon]

Hey! He didn't include play-dough! And whatabout jello!!

That's one of my wife's favorite questions: "but how would that work in jello?"

 

[Gaius46]

Have you read, "The Quark and the Jaguar" by Murray Gell-Mann? It really makes physicists human, even though it is a book about simplicity and complexity. What I really love is exploring the connections between disciplines - quantum physics, cosmology and biology, for example, none of which I really understand.

Yes - years ago. A few years out of college I became enamored of physics. It started with reading Hawking's A Brief History of Time. Among a bunch of others I read Gell-Mann's book. It's been so long that I don't recall many of the specifics. I have it somewhere in my library, I should reread it.

I also found in the bargain bin at a bookstore a copy of Einstein's book on special and general relativity. He wrote it to explain the theories to the layman. It is a great read as well.

 

[soap box]

That's one of my wife's favorite questions: "but how would that work in jello?"

Yes, I might have said before, I'm a school teacher, and jello comes up every year when we cover states of matter. Their textbooks still say "there are 3 states of matter" but I leaned a few years ago to say, "many things can be grouped into either solids, liquids or gas"

This thread is interesting because I usually understand everything you post, LOL!

 

[MamboDervish]

You're short a few. It blew my mind.

And yes, he's is literally speaking a different language....

I managed to get through nearly 12 minutes of this before I gave up. It takes too much energy to identify when he is toggling between languages. If you've got an English version, I'll sit through it.

 

[bomberfox]

Here's a good question for people: How many known states of matter are there?

Is quantized a state of matter?