A New Chapter of my PhD Has Begun 

First!

@@johnchessant3012 "First"

@Andrew Dotson have you seen this: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE--v6QXZOJYpo.html Would you consider working on fusion? Is that something that interests you?

Have you seen this: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-rbfFt2uNEyQ.html Stephen Wolfram says that we are almost at a "Fundamental Theory of Physics" Could you cover this on your channel and explain it in layman terms?

I did work on JETs at cern, didn't understand at all

Man time really flies

Better late than never, i always say.

@@AndrewDotsonvideos Can you please explain his rapid aging using a relativity argument?

And I woulda got away with it too

Lol

@@AndrewDotsonvideos haha got em good

🤣🤣🤣

Thanks so much!

Love seeing y’all make it happen, just as exciting for me to read about where y’all have taken your studies

distantcoder

waiting for papa flammy to say "haha engineer"

Heyy, I'm an electronics and telecommunication engineer as well!!

We stan such a supportive mama!

awww

It warms my heart to see a mom support their son so much. You watch all his videos too. Makes me jealous but happy to see there are good people out there.

@@cheetah219 - I have to say, that was very kind. You are here for a reason. Keep following your dreams! You can find support in some of the most amazing places. We’re all here for you too! Love, Andrew’s Mom 💕

@@maureendotson4634 “keep following your dreams” is such cliche advice but only now after I’ve developed the mental apparatus with which I approach life I realised how important it is. If we don’t follow our goals then we will just waste our lives in stagnation and probably regret.

Agreed.

🙌🏻it’s been great to here about all of y’all’s progress through the years as well

His videos helped me get into grad school. This guy is a legend.

Definitely

no offense but please speak for yourself. unless "we" refers to you and a group of people you know

QCD sometimes gives you that feeling like when youre in calculus 1 and read something about advanced differential geometry haha

Congrats on your hard work!

Yeah going to conferences and other places is (supposed to be) one of the few perks of gradschool, definitely feels more worth now that that part of gradschool is more viable again.

Best of luck with the rest of your schooling 🙌🏻

Congratulations at getting into Saturday Night Live as a physicist!

@@bruhmoment1835 it was a rigorous audition process

Andrew's an inspiration to me! I moved to New Mexico at the beginning of the year and started aa a freshman in EE and Astrophysics at UNM this year, my goal is to get an internship at COSMIAC, or Sandia or Los Alamos Lab. When I started following Andrew this year I had no idea he went to NMSU and worked at LANL, it's amazing to be able to get advice from him

Ah just right up the road !

I like that

@Amoeba bruh

😂😂

That’s awesome that you’re starting QFT, I feel like non-abelian gauge theories will come much more natural for you with your GR background than for most people who first encounter it. Same math, different group. Christoffel symbols -> gauge fields, parallel propagator -> Wilson lines, curvature tensor -> field strength tensor etc. it be interesting to talk with you about other parallels you notice along the way

@@AndrewDotsonvideos Yeah, I've noticed some of those parallels already. It seems in GR, you study curvature on "Riemannian manifolds", but in QFT you study curvature in "Principle Fiber Bundles". Unfortunately I haven't been able to find a good intro to fiber bundles that isn't just a mess of symbols and definitions, but it looks like most QFT texts don't bother talking about them anyway. I guess it's something only the pure mathematical physicists worry about.

@eigenchris you might want to try Mark J. D. Hamilton's book "Mathematical Gauge Theory". It is perfect for self study or studying in small groups. Also, gravity/GR can also be thought of as a gauge theory on a fibre bundle. More specifically it is a gauge theory formulated on a manifold's affine frame bundle or even its affine spin bundle. These are bundles that are as closely tied to the manifold's structure as its tangent bundle is.

Thanks a lot!

Thanks a lot! Always cool to see when people from outside of physics still find the videos enjoyable!

Be proud of your progress, keep it up!

Damn bro ur awesome!! I'll be in undergrad next year too!

Hey ,on what part of theoretical cosmology are u working on?

Thanks a lot!

Wow so cool to hear, thanks for sharing! Congrats on the masters program!

Although I am from a different field, I've been watching your videos for years! They're very entertaining!

They're pretty spot on, yeah I did a poor job taking care of myself the first couple of years of gradschool

The kids are all grown🥲

Congrats! Starting real strong!

Thanks a lot!

Yeah idk what happened with the audio the first several minutes, couldn’t tell from the cameras playback. Sorry about that

Interesting...Where do u study ?

Wow that's awesome! And if you're talking around the 11:08 mark, the J's are actually "Jet Functions". They describe the perturbative evolution of the struck quark into the jet. Bessel functions still show up in QFT calculations though. Mostly because you can do a fourier transform from momentum to position space, and the e^{i k dot x) is a 4-dimensional dot product, so there's angular dependence. You can do a partial wave expansion, reducing the 3-dimensional part of the fourier transform into an integral of a legendre polynomial (the angular integral) and a bessel function (the radial integral). Bastards can actually be pretty challenging to integrate numerically due to the oscillations of the bessel function.