How To Make a Black Hole

Wouldn’t it be cool to have a little black hole in your office? You know, maybe as a trash bin. Or to move around the furniture. Or just as a kind of nerdy gimmick. Why can we not make black holes? Or can we? If we could, what could we do with them? And what’s a black hole laser? That’s what we’ll talk about today.

The Press and Teukolsky paper about the black hole bomb is here:

The paper about black hole lasers by Corey and Jacobson is here:

The paper about the observation of black hole lasing in an analogue black hole is here:

0:00 Intro
0:38 Why is making black holes difficult?
2:41 What would it take to make a black hole?
4:55 What could we do with a black hole?
7:07 Black hole bombs
8:31 Black hole lasers
11:21 Sponsor Message

[johnholly]

I watch a lot of science YouTubers, and you are my favorite Sabine for your no nonsense type of attitude.

[StefanLopuszanski]

Would love a video on why you think Planck Length isn't the smallest.

[DrBrianKeating]

Love this video Sabine! And thanks for promoting my channel. One cool related effect involves so-called “sonic black holes “, sometimes called a dumb hole or acoustic black hole, is a phenomenon in which phonons ... first theorized to be by William Unruh in 1981. In these BH phonons (sound perturbations) are unable to escape from a region of a fluid that is flowing more quickly than the local speed of sound. In 2010, some experimentalists even made one in the lab that rotated like most astrophysical black holes!

[ZFlyingVLover]

Thank you for clearing away all the misinformation and disinformation surrounding black hole news articles written by people who don't know wtf they're talking about and only use the headlines to add to everyone's stress. They're entitled to their own opinions just not their own facts.

[msromike]

Thank you Dr. Hossenfelder! I love science and physics and am so glad that I found someone who can present these concepts at a level I can understand.

"If you can't explain it simply, you don't understand it well enough."

[AngadSingh-bvvn]

@2:05 I would absolutely love to hear your take on the planck lenght Dr.Hossenfelder and all other units planck sized, what really is the mystery about it and why does quantum mechanics not have a description of it?

[MeDjezze]

3:50 Toasty! I never expected to see a Mortal Kombat reference here. 😂

[razvanciuca]

Actually manipulating the blackhole might be easier than expected, you just have to throw stuff in it to change its momentum. So if you surround a black hole with particle accelerators then you can push a black hole around pretty easily by varying the momentum of the particles you're dumping in it.

[ReynaSingh]

Lex Fridman should have you on his podcast

[mcarston]

Black Hole Lasers will be the name of my new band. Thanks for the inspiration!

[thepom]

There is a Black Hole in my washing machine, it keeps eating my socks!!!

[FlyingTurtleLP]

3:50 ... A mortal kombat ref? ... damn, I am actually impressed.

[dskrvk]

Artificial black holes (made using “grasers”), black hole drives, and using natural BHs for acceleration were all featured in Peter Watts’ Sunflower cycle.

[TyMoore]

Thank you, Sabine, for another "Hole-in-one!" 😉
You always have a wonderful, matter of fact explaination that most people can actually understand. Keep up the great work!

[quantumtacos]

It's hard to walk away from an idea you've spent half your life working on, but in 2022 Hossenfelder and Keating showed that it's possible to have a sponsor message that I actually want to hear.

[wotireckon]

Wow 🤯 I hadn't appreciated that gravity changes with radius 🙄. See: you are teaching everyone - even thickos like me!!! Thank you very much Sabine. Always a pleasure to watch and try to understand!

[DennisWronka]

As a fan of both Einstein and Mortal Kombat, I really loved the Einstein Toasty.
Also, do I interpret your objection to the Planck length being the minimal possible length correctly as you seeing space as continuous as opposed to quantized?

[The_Horse-leafs_Cabbage]

Your side comment on the Planck length interests me... I'm guessing that it has to do with many folk interpreting it as the universal "pixel size, " when it's really the size at which our current models tend to break down.
It'd be weird to think that the universe simply stops at that size, considering how far we've already gotten into viewing the quantum world.
Especially when we are fairly certain that there's no size limit in the opposite direction (in regards to space, temperature, and time... Things that all have a Planck length).

Well... Temperature is a bit different, due to the measurable Absolute Zero point.

[rofflestomp]

Thanks for another video close to my heart, especially this one, since I majored in Electro-Optics. I remember talking with one of my instructors about building one shot lasers back in college and asked if a certain element would laze, and his reply changed the way I understood lasers from then on. He said "Anything could be made to laze at least once, provided you could pump it with enough energy." Not sure just where on The Kardashev scale ones civilization needs to be at to produce Hawking radiation lazers, but it is cool to think about.

[alansmithee]

8:25
If the energy increases exponentially, does that mean that theoretically you could "kill" a black hole if you built an infinitely strong mirror around it? Or does it only take rotational energy rather than mass from the black hole?