Bhavay Tyagi
@bhavaytyagi.bsky.social
Theoretical Physicist. Thought Experimentalist.
Cohost: The Knowmads Podcast
Cohost: The Knowmads Podcast
Reposted by Bhavay Tyagi
"Boltzmann Brains" is a fanciful name for a dead-serious idea. I'm beginning to wonder whether the name hasn't caused the physics community to not spend nearly enough time thinking carefully about the problems that they pose.
We have Boltzmann Brain Blindness.
Long 🧵 coming. ⚛️ #cosmology
(1/n)
We have Boltzmann Brain Blindness.
Long 🧵 coming. ⚛️ #cosmology
(1/n)
July 10, 2026 at 12:20 PM
"Boltzmann Brains" is a fanciful name for a dead-serious idea. I'm beginning to wonder whether the name hasn't caused the physics community to not spend nearly enough time thinking carefully about the problems that they pose.
We have Boltzmann Brain Blindness.
Long 🧵 coming. ⚛️ #cosmology
(1/n)
We have Boltzmann Brain Blindness.
Long 🧵 coming. ⚛️ #cosmology
(1/n)
Math proofs online, physics research accelerating—as much as could be said about any period in history, this really does feel like a pivotal moment for humanity.
I’m just glad to be alive.
I’m just glad to be alive.
July 21, 2026 at 3:05 PM
Math proofs online, physics research accelerating—as much as could be said about any period in history, this really does feel like a pivotal moment for humanity.
I’m just glad to be alive.
I’m just glad to be alive.
Reposted by Bhavay Tyagi
I'm sad to report that Mark Wise, theoretical physicist at Caltech, has passed away. He was my friend and collaborator, a giant of theoretical physics, and just one of my favorite people. RIP.
www.pma.caltech.edu/people/mark-...
www.pma.caltech.edu/people/mark-...
Mark B. Wise
-
Division of Physics, Mathematics and Astronomy
www.pma.caltech.edu
July 12, 2026 at 3:12 PM
I'm sad to report that Mark Wise, theoretical physicist at Caltech, has passed away. He was my friend and collaborator, a giant of theoretical physics, and just one of my favorite people. RIP.
www.pma.caltech.edu/people/mark-...
www.pma.caltech.edu/people/mark-...
Reposted by Bhavay Tyagi
Mindscape 358 | Solo: Vacuum Energy and the Cosmological Constant. I start talking about why the universe is accelerating -- but there was too much to say, so next week we'll have a follow-up episode. #MindscapePodcast
www.preposterousuniverse.com/podcast/2026...
www.preposterousuniverse.com/podcast/2026...
June 22, 2026 at 10:21 AM
Mindscape 358 | Solo: Vacuum Energy and the Cosmological Constant. I start talking about why the universe is accelerating -- but there was too much to say, so next week we'll have a follow-up episode. #MindscapePodcast
www.preposterousuniverse.com/podcast/2026...
www.preposterousuniverse.com/podcast/2026...
An old fable for Dualities in Physics:
Once, a group of blind men were asked to describe an elephant. As they reached out to touch it, the one who felt the trunk said it was a snake. Another touched the body and said it was a wall. But in reality, they were all trying to describe the same thing.
Once, a group of blind men were asked to describe an elephant. As they reached out to touch it, the one who felt the trunk said it was a snake. Another touched the body and said it was a wall. But in reality, they were all trying to describe the same thing.
May 25, 2026 at 4:58 AM
An old fable for Dualities in Physics:
Once, a group of blind men were asked to describe an elephant. As they reached out to touch it, the one who felt the trunk said it was a snake. Another touched the body and said it was a wall. But in reality, they were all trying to describe the same thing.
Once, a group of blind men were asked to describe an elephant. As they reached out to touch it, the one who felt the trunk said it was a snake. Another touched the body and said it was a wall. But in reality, they were all trying to describe the same thing.
Episode 26 with Ashmeet Singh is now the most watched video of the Knowmads podcast. Check it out on YouTube if you missed it. Link in the previous post.
May 7, 2026 at 5:45 PM
Episode 26 with Ashmeet Singh is now the most watched video of the Knowmads podcast. Check it out on YouTube if you missed it. Link in the previous post.
Reposted by Bhavay Tyagi
One in a million will actually discover treasure and everyone will express admiration for that one’s visionary spirit
just overheard a 4th grader telling her friend, "if you ever need to distract some boys, literally just draw an X in the dirt. they'll stop to dig it up, they can't help it" which is the only gender metric I'll be using, moving forward
May 2, 2026 at 1:33 AM
One in a million will actually discover treasure and everyone will express admiration for that one’s visionary spirit
5 things I do as a PhD student so I don’t lose myself.
0/5
0/5
May 2, 2026 at 5:38 AM
5 things I do as a PhD student so I don’t lose myself.
0/5
0/5
The paradoxical nature of our world has led to many discoveries and here’s one that’s still unresolved:
The laws of quantum mechanics are perfectly reversible, yet the world we experience is irreversible.
0/7
The laws of quantum mechanics are perfectly reversible, yet the world we experience is irreversible.
0/7
April 29, 2026 at 12:53 AM
The paradoxical nature of our world has led to many discoveries and here’s one that’s still unresolved:
The laws of quantum mechanics are perfectly reversible, yet the world we experience is irreversible.
0/7
The laws of quantum mechanics are perfectly reversible, yet the world we experience is irreversible.
0/7
As I near 5th yr of PhD in Physics, I reflect on lessons beyond eqns, papers & prob-solving.
It has taught me patience, humility, resilience & comfort with uncertainty.
If you’re considering PhD in fundamental science, I hope this aids honest entry with less fear. 0/5
It has taught me patience, humility, resilience & comfort with uncertainty.
If you’re considering PhD in fundamental science, I hope this aids honest entry with less fear. 0/5
April 26, 2026 at 2:03 AM
As I near 5th yr of PhD in Physics, I reflect on lessons beyond eqns, papers & prob-solving.
It has taught me patience, humility, resilience & comfort with uncertainty.
If you’re considering PhD in fundamental science, I hope this aids honest entry with less fear. 0/5
It has taught me patience, humility, resilience & comfort with uncertainty.
If you’re considering PhD in fundamental science, I hope this aids honest entry with less fear. 0/5
Reposted by Bhavay Tyagi
We have created a world with previously unimagined material abundance, and yet we have organized society such that many people struggle with loneliness and alienation. Now we're offering tools that enhance delusion and paranoia.
www.404media.co/delusion-usi...
www.404media.co/delusion-usi...
Researchers Simulated a Delusional User to Test Chatbot Safety
Grok and Gemini encouraged delusions and isolated users, while the newer ChatGPT model and Claude hit the emotional brakes.
www.404media.co
April 23, 2026 at 6:21 PM
We have created a world with previously unimagined material abundance, and yet we have organized society such that many people struggle with loneliness and alienation. Now we're offering tools that enhance delusion and paranoia.
www.404media.co/delusion-usi...
www.404media.co/delusion-usi...
Remembering the innocent lives lost in the Pahalgam terror attack one year ago today. We stand with the families who continue to carry this loss. As a nation, we remain united against terror, unwavering in our resolve.
April 22, 2026 at 11:13 PM
Remembering the innocent lives lost in the Pahalgam terror attack one year ago today. We stand with the families who continue to carry this loss. As a nation, we remain united against terror, unwavering in our resolve.
Full house at @pattersonparkhtx tonight. I had so much fun talking about: Are we living in a Matrix!
A big thank you to @after5society for the invite and organising this and a bigger thanks to each and everyone who showed up. Cheers 🥂
A big thank you to @after5society for the invite and organising this and a bigger thanks to each and everyone who showed up. Cheers 🥂
April 22, 2026 at 4:44 AM
Full house at @pattersonparkhtx tonight. I had so much fun talking about: Are we living in a Matrix!
A big thank you to @after5society for the invite and organising this and a bigger thanks to each and everyone who showed up. Cheers 🥂
A big thank you to @after5society for the invite and organising this and a bigger thanks to each and everyone who showed up. Cheers 🥂
Reposted by Bhavay Tyagi
Episode 26 | Ashmeet Singh on a Quantum-First Approach to Space, Time, Gravity, and Cosmology.
Ashmeet is a theoretical physicist who completed his PhD at Caltech under @seanmcarroll.bsky.social .
He is now a professor of physics at IIT Delhi.
@prachigarella.bsky.social
youtu.be/guzfjpGh2wY?...
Ashmeet is a theoretical physicist who completed his PhD at Caltech under @seanmcarroll.bsky.social .
He is now a professor of physics at IIT Delhi.
@prachigarella.bsky.social
youtu.be/guzfjpGh2wY?...
Ashmeet Singh on a Quantum-First Approach to Space, Time, Gravity, and Cosmology
YouTube video by The Knowmads Podcast
youtu.be
April 21, 2026 at 3:47 AM
Episode 26 | Ashmeet Singh on a Quantum-First Approach to Space, Time, Gravity, and Cosmology.
Ashmeet is a theoretical physicist who completed his PhD at Caltech under @seanmcarroll.bsky.social .
He is now a professor of physics at IIT Delhi.
@prachigarella.bsky.social
youtu.be/guzfjpGh2wY?...
Ashmeet is a theoretical physicist who completed his PhD at Caltech under @seanmcarroll.bsky.social .
He is now a professor of physics at IIT Delhi.
@prachigarella.bsky.social
youtu.be/guzfjpGh2wY?...
Mathematicians call prime numbers the building blocks, analogous to atoms. I find this weird. In physics, building blocks have a smaller scale associated with them, while prime numbers are at the same “scale” as all other numbers. How do you think about this?
April 21, 2026 at 4:52 PM
Mathematicians call prime numbers the building blocks, analogous to atoms. I find this weird. In physics, building blocks have a smaller scale associated with them, while prime numbers are at the same “scale” as all other numbers. How do you think about this?
Episode 26 | Ashmeet Singh on a Quantum-First Approach to Space, Time, Gravity, and Cosmology.
Ashmeet is a theoretical physicist who completed his PhD at Caltech under @seanmcarroll.bsky.social .
He is now a professor of physics at IIT Delhi.
@prachigarella.bsky.social
youtu.be/guzfjpGh2wY?...
Ashmeet is a theoretical physicist who completed his PhD at Caltech under @seanmcarroll.bsky.social .
He is now a professor of physics at IIT Delhi.
@prachigarella.bsky.social
youtu.be/guzfjpGh2wY?...
Ashmeet Singh on a Quantum-First Approach to Space, Time, Gravity, and Cosmology
YouTube video by The Knowmads Podcast
youtu.be
April 21, 2026 at 3:47 AM
Episode 26 | Ashmeet Singh on a Quantum-First Approach to Space, Time, Gravity, and Cosmology.
Ashmeet is a theoretical physicist who completed his PhD at Caltech under @seanmcarroll.bsky.social .
He is now a professor of physics at IIT Delhi.
@prachigarella.bsky.social
youtu.be/guzfjpGh2wY?...
Ashmeet is a theoretical physicist who completed his PhD at Caltech under @seanmcarroll.bsky.social .
He is now a professor of physics at IIT Delhi.
@prachigarella.bsky.social
youtu.be/guzfjpGh2wY?...
Reposted by Bhavay Tyagi
This person on Twitter is taking my threads and posts and presenting them verbatim as his own.
April 20, 2026 at 10:41 PM
This person on Twitter is taking my threads and posts and presenting them verbatim as his own.
Alright, will try to finish this masterpiece this winter.
November 29, 2025 at 6:44 PM
Alright, will try to finish this masterpiece this winter.
Can’t wait to share this incredible conversation with y’all.
Recorded a podcast with @danielwhiteson.bsky.social and we talked about his New Book “Do Aliens speak Physics?” (Available November 4th)
Stay tuned for a great conversation!
@bhavaytyagi.bsky.social
Stay tuned for a great conversation!
@bhavaytyagi.bsky.social
October 9, 2025 at 4:57 PM
Can’t wait to share this incredible conversation with y’all.
Reposted by Bhavay Tyagi
New episode with @evevavagiakis.bsky.social is out now on the Knowmads Podcast @bhavaytyagi.bsky.social
m.youtube.com/watch
m.youtube.com/watch
September 30, 2025 at 4:02 PM
New episode with @evevavagiakis.bsky.social is out now on the Knowmads Podcast @bhavaytyagi.bsky.social
m.youtube.com/watch
m.youtube.com/watch
Reposted by Bhavay Tyagi
Recorded a new podcast episode with @nikosarcevic.com
Had so much fun and what a scintillating conversation! Can’t wait to share with y’all!
@bhavaytyagi.bsky.social
Had so much fun and what a scintillating conversation! Can’t wait to share with y’all!
@bhavaytyagi.bsky.social
August 30, 2025 at 12:31 AM
Recorded a new podcast episode with @nikosarcevic.com
Had so much fun and what a scintillating conversation! Can’t wait to share with y’all!
@bhavaytyagi.bsky.social
Had so much fun and what a scintillating conversation! Can’t wait to share with y’all!
@bhavaytyagi.bsky.social
Reposted by Bhavay Tyagi
Recorded an episode of The Knowmads Podcast with Eve Vavagiakis @evevavagiakis.bsky.social , Experimental Cosmologist from Duke University.
It was one of the most refreshing conversations ever!
We (@bhavaytyagi.bsky.social and I) can’t wait to share it with y’all.
It was one of the most refreshing conversations ever!
We (@bhavaytyagi.bsky.social and I) can’t wait to share it with y’all.
August 26, 2025 at 5:25 AM
Recorded an episode of The Knowmads Podcast with Eve Vavagiakis @evevavagiakis.bsky.social , Experimental Cosmologist from Duke University.
It was one of the most refreshing conversations ever!
We (@bhavaytyagi.bsky.social and I) can’t wait to share it with y’all.
It was one of the most refreshing conversations ever!
We (@bhavaytyagi.bsky.social and I) can’t wait to share it with y’all.