Nirmalya Kajuri
@kajunut.bsky.social
Assistant Professor of Physics at IIT Mandi and Science Writer. Writing a pop sci book about black hole information loss paradox.
Pinned
Nirmalya Kajuri
@kajunut.bsky.social
· Nov 9
The Spacetime Beat | Nirmalya Kajuri | Substack
All the cool fundamental physics you have been missing out on. Click to read The Spacetime Beat, by Nirmalya Kajuri, a Substack publication with hundreds of subscribers.
nirmalyakajuri.substack.com
How often do you find yourself wishing for a newsletter that covered fundamental physics in way that was accessible but not dumbed down? Pretty often, I am sure!
Well, here it is. My free newsletter--"The Spacetime Beat". Enjoy!
nirmalyakajuri.substack.com
⚛️🧪
Well, here it is. My free newsletter--"The Spacetime Beat". Enjoy!
nirmalyakajuri.substack.com
⚛️🧪
Can a black hole replace the Large Hadron Collider?
Rapidly rotating (Kerr) black holes can accelerate particles to enormously high energies., provided the particles have finetuned values of angular momentum. It can dwarf any accelerator on earth!
But..
1/3 ⚛️🧪
Rapidly rotating (Kerr) black holes can accelerate particles to enormously high energies., provided the particles have finetuned values of angular momentum. It can dwarf any accelerator on earth!
But..
1/3 ⚛️🧪
February 17, 2026 at 6:59 AM
Can a black hole replace the Large Hadron Collider?
Rapidly rotating (Kerr) black holes can accelerate particles to enormously high energies., provided the particles have finetuned values of angular momentum. It can dwarf any accelerator on earth!
But..
1/3 ⚛️🧪
Rapidly rotating (Kerr) black holes can accelerate particles to enormously high energies., provided the particles have finetuned values of angular momentum. It can dwarf any accelerator on earth!
But..
1/3 ⚛️🧪
An important skillset for physicists is the mastery of computational techniques. With the advent of AI, this particular skillset looks like the first to be replaced.
Wonder what this will mean for the the subset of physicists for whom this was the primary skillset.
🧪⚛️
Wonder what this will mean for the the subset of physicists for whom this was the primary skillset.
🧪⚛️
February 14, 2026 at 9:00 AM
An important skillset for physicists is the mastery of computational techniques. With the advent of AI, this particular skillset looks like the first to be replaced.
Wonder what this will mean for the the subset of physicists for whom this was the primary skillset.
🧪⚛️
Wonder what this will mean for the the subset of physicists for whom this was the primary skillset.
🧪⚛️
Very cool! The field of scattering amplitudes involves working with massive algebraic expressions and finding patterns in them. Which is exactly the sort of thing AI is great at. Expect AI to become indispensable to this field.
⚛️🧪
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GPT-5.2 derived a new result in theoretical physics.
We’re releasing the result in a preprint with researchers from @the_IAS, @VanderbiltU, @Cambridge_Uni, and @Harvard. It shows that a gluon interaction many physicists expected would not occur can arise under specific conditions. (1/2)
We’re releasing the result in a preprint with researchers from @the_IAS, @VanderbiltU, @Cambridge_Uni, and @Harvard. It shows that a gluon interaction many physicists expected would not occur can arise under specific conditions. (1/2)
February 14, 2026 at 4:31 AM
Very cool! The field of scattering amplitudes involves working with massive algebraic expressions and finding patterns in them. Which is exactly the sort of thing AI is great at. Expect AI to become indispensable to this field.
⚛️🧪
⚛️🧪
You may have heard that spacetime is geometry, but what if I told you that even Newton’s laws are geometric?
Newton’s laws say: if you tell me position and momentum of a system now, I can figure what they will be at any future point by solving equations given by Newton’s laws..
1/4
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Newton’s laws say: if you tell me position and momentum of a system now, I can figure what they will be at any future point by solving equations given by Newton’s laws..
1/4
⚛️🧪
February 13, 2026 at 9:00 PM
You may have heard that spacetime is geometry, but what if I told you that even Newton’s laws are geometric?
Newton’s laws say: if you tell me position and momentum of a system now, I can figure what they will be at any future point by solving equations given by Newton’s laws..
1/4
⚛️🧪
Newton’s laws say: if you tell me position and momentum of a system now, I can figure what they will be at any future point by solving equations given by Newton’s laws..
1/4
⚛️🧪
Physicist Ivette Fuentes turned down Epstein money:
"The dream of my life is to build a gravitational-wave detector..So, if someone were to say to me, ‘I'll give you the money to make your dream come true,' it would be very tempting to say yes. But then you have your ethical standards."
⚛️🧪
"The dream of my life is to build a gravitational-wave detector..So, if someone were to say to me, ‘I'll give you the money to make your dream come true,' it would be very tempting to say yes. But then you have your ethical standards."
⚛️🧪
February 1, 2026 at 11:02 PM
Physicist Ivette Fuentes turned down Epstein money:
"The dream of my life is to build a gravitational-wave detector..So, if someone were to say to me, ‘I'll give you the money to make your dream come true,' it would be very tempting to say yes. But then you have your ethical standards."
⚛️🧪
"The dream of my life is to build a gravitational-wave detector..So, if someone were to say to me, ‘I'll give you the money to make your dream come true,' it would be very tempting to say yes. But then you have your ethical standards."
⚛️🧪
Average PhD in Amplitudes ⚛️
January 29, 2026 at 5:25 PM
Average PhD in Amplitudes ⚛️
Ed Witten, the journalist?
⚛️🧪
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January 28, 2026 at 6:55 PM
Ed Witten, the journalist?
⚛️🧪
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Campus looking good these days (photo by Munna Kumar)
January 27, 2026 at 6:35 PM
Campus looking good these days (photo by Munna Kumar)
Is that particle physics in your pocket or are you just happy to see me
🧪⚛️
🧪⚛️
January 27, 2026 at 4:42 PM
Is that particle physics in your pocket or are you just happy to see me
🧪⚛️
🧪⚛️
User: *teep kicks chatgpt*
chatgpt: you are right to push back
chatgpt: you are right to push back
January 22, 2026 at 9:37 PM
User: *teep kicks chatgpt*
chatgpt: you are right to push back
chatgpt: you are right to push back
As an ADHD-haver, AI helps me reduce the activation cost of starting tasks.
Say I need to check for mistakes in a long computation. I let AI have a look, then check its report. After a bit of back and forth, I know where the mistakes might be. At that point I'm ready to dive in.
⚛️🧪
Say I need to check for mistakes in a long computation. I let AI have a look, then check its report. After a bit of back and forth, I know where the mistakes might be. At that point I'm ready to dive in.
⚛️🧪
January 21, 2026 at 10:55 PM
As an ADHD-haver, AI helps me reduce the activation cost of starting tasks.
Say I need to check for mistakes in a long computation. I let AI have a look, then check its report. After a bit of back and forth, I know where the mistakes might be. At that point I'm ready to dive in.
⚛️🧪
Say I need to check for mistakes in a long computation. I let AI have a look, then check its report. After a bit of back and forth, I know where the mistakes might be. At that point I'm ready to dive in.
⚛️🧪
Reposted by Nirmalya Kajuri
Anyway, like all the best physics analogies, you can express Nambu's illustration of spontaneous symmetry breaking via emoji.
⬅️↘️⬆️↖️⬇️
↘️↖️⬆️⬅️↖️
⬅️⬆️↙️↘️↖️
↗️⬆️↘️➡️↖️
↙️⬇️➡️↖️⬆️
vs
➡️➡️➡️➡️➡️
➡️➡️➡️➡️➡️
➡️➡️➡️➡️➡️
➡️➡️➡️➡️➡️
➡️➡️➡️➡️➡️
(8/8)
⬅️↘️⬆️↖️⬇️
↘️↖️⬆️⬅️↖️
⬅️⬆️↙️↘️↖️
↗️⬆️↘️➡️↖️
↙️⬇️➡️↖️⬆️
vs
➡️➡️➡️➡️➡️
➡️➡️➡️➡️➡️
➡️➡️➡️➡️➡️
➡️➡️➡️➡️➡️
➡️➡️➡️➡️➡️
(8/8)
January 18, 2025 at 4:51 PM
Anyway, like all the best physics analogies, you can express Nambu's illustration of spontaneous symmetry breaking via emoji.
⬅️↘️⬆️↖️⬇️
↘️↖️⬆️⬅️↖️
⬅️⬆️↙️↘️↖️
↗️⬆️↘️➡️↖️
↙️⬇️➡️↖️⬆️
vs
➡️➡️➡️➡️➡️
➡️➡️➡️➡️➡️
➡️➡️➡️➡️➡️
➡️➡️➡️➡️➡️
➡️➡️➡️➡️➡️
(8/8)
⬅️↘️⬆️↖️⬇️
↘️↖️⬆️⬅️↖️
⬅️⬆️↙️↘️↖️
↗️⬆️↘️➡️↖️
↙️⬇️➡️↖️⬆️
vs
➡️➡️➡️➡️➡️
➡️➡️➡️➡️➡️
➡️➡️➡️➡️➡️
➡️➡️➡️➡️➡️
➡️➡️➡️➡️➡️
(8/8)
Reposted by Nirmalya Kajuri
My top five "more people should look into that" topics in my field (theoretical high energy physics):
1. String duals of gauge theories
2. Stochastic quantization of gauge theories
3. Phase space methods in QFT
4. String field theory
5. Schwinger's action principle
What is your list?
⚛️🧪
1. String duals of gauge theories
2. Stochastic quantization of gauge theories
3. Phase space methods in QFT
4. String field theory
5. Schwinger's action principle
What is your list?
⚛️🧪
January 5, 2026 at 12:14 AM
My top five "more people should look into that" topics in my field (theoretical high energy physics):
1. String duals of gauge theories
2. Stochastic quantization of gauge theories
3. Phase space methods in QFT
4. String field theory
5. Schwinger's action principle
What is your list?
⚛️🧪
1. String duals of gauge theories
2. Stochastic quantization of gauge theories
3. Phase space methods in QFT
4. String field theory
5. Schwinger's action principle
What is your list?
⚛️🧪
My top five "more people should look into that" topics in my field (theoretical high energy physics):
1. String duals of gauge theories
2. Stochastic quantization of gauge theories
3. Phase space methods in QFT
4. String field theory
5. Schwinger's action principle
What is your list?
⚛️🧪
1. String duals of gauge theories
2. Stochastic quantization of gauge theories
3. Phase space methods in QFT
4. String field theory
5. Schwinger's action principle
What is your list?
⚛️🧪
January 5, 2026 at 12:14 AM
My top five "more people should look into that" topics in my field (theoretical high energy physics):
1. String duals of gauge theories
2. Stochastic quantization of gauge theories
3. Phase space methods in QFT
4. String field theory
5. Schwinger's action principle
What is your list?
⚛️🧪
1. String duals of gauge theories
2. Stochastic quantization of gauge theories
3. Phase space methods in QFT
4. String field theory
5. Schwinger's action principle
What is your list?
⚛️🧪
Physicists be like
⚛️🧪
⚛️🧪
January 4, 2026 at 12:21 PM
Physicists be like
⚛️🧪
⚛️🧪
What was the most interesting development this year in your research area?
In holography, my vote would go for this and (even more) the subsequent baby universe debate.
www.quantamagazine.org/cosmic-parad...
⚛️🧪
In holography, my vote would go for this and (even more) the subsequent baby universe debate.
www.quantamagazine.org/cosmic-parad...
⚛️🧪
Cosmic Paradox Reveals the Awful Consequence of an Observer-Free Universe | Quanta Magazine
Encouraged by successes in understanding black holes, theoretical physicists are applying what they’ve learned to whole universes. What they’re finding has them questioning fundamental assumptions abo...
www.quantamagazine.org
January 1, 2026 at 1:05 PM
What was the most interesting development this year in your research area?
In holography, my vote would go for this and (even more) the subsequent baby universe debate.
www.quantamagazine.org/cosmic-parad...
⚛️🧪
In holography, my vote would go for this and (even more) the subsequent baby universe debate.
www.quantamagazine.org/cosmic-parad...
⚛️🧪
Steve Hsu predicts that in the next 15 years, AI will take Ed Witten's place as the oracle figure
⚛️🧪
⚛️🧪
December 19, 2025 at 8:07 AM
Steve Hsu predicts that in the next 15 years, AI will take Ed Witten's place as the oracle figure
⚛️🧪
⚛️🧪
What are the prospects of AI in physics? Will it generate more progress, or more noise?
I sat down with two physicists, Stephen Hsu and Jonathan Oppenheim.
Steve is an optimist while Jonathan is 'curmudgeonly' about AI.
The discussion was fascinating! ⚛️🧪
www.youtube.com/watch?v=BRuD...
I sat down with two physicists, Stephen Hsu and Jonathan Oppenheim.
Steve is an optimist while Jonathan is 'curmudgeonly' about AI.
The discussion was fascinating! ⚛️🧪
www.youtube.com/watch?v=BRuD...
Can AI Crack Quantum Physics? (w/ Stephen Hsu and Jonathan Oppenheim)
YouTube video by Nirmalya Kajuri
www.youtube.com
December 18, 2025 at 6:17 AM
What are the prospects of AI in physics? Will it generate more progress, or more noise?
I sat down with two physicists, Stephen Hsu and Jonathan Oppenheim.
Steve is an optimist while Jonathan is 'curmudgeonly' about AI.
The discussion was fascinating! ⚛️🧪
www.youtube.com/watch?v=BRuD...
I sat down with two physicists, Stephen Hsu and Jonathan Oppenheim.
Steve is an optimist while Jonathan is 'curmudgeonly' about AI.
The discussion was fascinating! ⚛️🧪
www.youtube.com/watch?v=BRuD...
Reposted by Nirmalya Kajuri
Recently, a physics paper whose central idea came from AI was published in a peer reviewed journal. How good is AI as a physicist? Is it time for us to hang up our boots already?
I got in the absolute weeds to find out
⚛️🧪
nirmalyakajuri.substack.com/p/ais-first-...
I got in the absolute weeds to find out
⚛️🧪
nirmalyakajuri.substack.com/p/ais-first-...
AI's First Physics Paper: Slop or Banger?
In the last few months, several mathematicians have about how AI assistance is helping them solve problems.
nirmalyakajuri.substack.com
December 8, 2025 at 1:46 PM
Recently, a physics paper whose central idea came from AI was published in a peer reviewed journal. How good is AI as a physicist? Is it time for us to hang up our boots already?
I got in the absolute weeds to find out
⚛️🧪
nirmalyakajuri.substack.com/p/ais-first-...
I got in the absolute weeds to find out
⚛️🧪
nirmalyakajuri.substack.com/p/ais-first-...
Recently, a physics paper whose central idea came from AI was published in a peer reviewed journal. How good is AI as a physicist? Is it time for us to hang up our boots already?
I got in the absolute weeds to find out
⚛️🧪
nirmalyakajuri.substack.com/p/ais-first-...
I got in the absolute weeds to find out
⚛️🧪
nirmalyakajuri.substack.com/p/ais-first-...
AI's First Physics Paper: Slop or Banger?
In the last few months, several mathematicians have about how AI assistance is helping them solve problems.
nirmalyakajuri.substack.com
December 8, 2025 at 1:46 PM
Recently, a physics paper whose central idea came from AI was published in a peer reviewed journal. How good is AI as a physicist? Is it time for us to hang up our boots already?
I got in the absolute weeds to find out
⚛️🧪
nirmalyakajuri.substack.com/p/ais-first-...
I got in the absolute weeds to find out
⚛️🧪
nirmalyakajuri.substack.com/p/ais-first-...
New Post!
Multiverse is the one physics idea that broke confinement and exploded into popular consciousness.
But if you only know of the multiverse from Marvel movies, it will come as a surprise that there isn’t just one multiverse in physics, but three..
⚛️🧪
open.substack.com/pub/nirmalya...
Multiverse is the one physics idea that broke confinement and exploded into popular consciousness.
But if you only know of the multiverse from Marvel movies, it will come as a surprise that there isn’t just one multiverse in physics, but three..
⚛️🧪
open.substack.com/pub/nirmalya...
Meet the Multiverses
Three distinct ideas of a multiverse appear in physics. What do they mean?
open.substack.com
December 1, 2025 at 3:54 PM
New Post!
Multiverse is the one physics idea that broke confinement and exploded into popular consciousness.
But if you only know of the multiverse from Marvel movies, it will come as a surprise that there isn’t just one multiverse in physics, but three..
⚛️🧪
open.substack.com/pub/nirmalya...
Multiverse is the one physics idea that broke confinement and exploded into popular consciousness.
But if you only know of the multiverse from Marvel movies, it will come as a surprise that there isn’t just one multiverse in physics, but three..
⚛️🧪
open.substack.com/pub/nirmalya...
Gave Chatgpt some tedious physics computations to do. It returned the right answer but complained just like a real student:
"This is straightforward but tedious."
"I grinded through the algebra."
AGI confirmed
"This is straightforward but tedious."
"I grinded through the algebra."
AGI confirmed
November 17, 2025 at 5:25 PM
Gave Chatgpt some tedious physics computations to do. It returned the right answer but complained just like a real student:
"This is straightforward but tedious."
"I grinded through the algebra."
AGI confirmed
"This is straightforward but tedious."
"I grinded through the algebra."
AGI confirmed
I tried looking back at the good old days, but all I saw was lockdowns and sourdough breads.
I guess hindsight really is 2020.
I guess hindsight really is 2020.
November 11, 2025 at 3:16 PM
I tried looking back at the good old days, but all I saw was lockdowns and sourdough breads.
I guess hindsight really is 2020.
I guess hindsight really is 2020.
How often do you find yourself wishing for a newsletter that covered fundamental physics in way that was accessible but not dumbed down? Pretty often, I am sure!
Well, here it is. My free newsletter--"The Spacetime Beat". Enjoy!
nirmalyakajuri.substack.com
⚛️🧪
Well, here it is. My free newsletter--"The Spacetime Beat". Enjoy!
nirmalyakajuri.substack.com
⚛️🧪
The Spacetime Beat | Nirmalya Kajuri | Substack
All the cool fundamental physics you have been missing out on. Click to read The Spacetime Beat, by Nirmalya Kajuri, a Substack publication with hundreds of subscribers.
nirmalyakajuri.substack.com
November 9, 2025 at 5:21 PM
How often do you find yourself wishing for a newsletter that covered fundamental physics in way that was accessible but not dumbed down? Pretty often, I am sure!
Well, here it is. My free newsletter--"The Spacetime Beat". Enjoy!
nirmalyakajuri.substack.com
⚛️🧪
Well, here it is. My free newsletter--"The Spacetime Beat". Enjoy!
nirmalyakajuri.substack.com
⚛️🧪
November 5, 2025 at 7:33 PM