Ayushphy Cosmological

One of the coolest things I heard from Shiraz Minwalla about how he actually learned to think like a theoretical physicist: In college, he felt completely lost when he started general relativity. "I remember going to my professor and asking him, I read that the distance between Andromeda Galaxy and our galaxy is whatever, two million light years. What does it mean? What does it mean given gendered relativity is so uncertain? What does it mean? And I felt really unsure. And then I started reading Landau Lifshitz The last part of Classical Theory of Fields is on general relativity. It was just so great." Much more in the full episode.

@SkyrootA Congratulations @SkyrootA team 🚀

Hello space, we have arrived! Vikram-1's Test Flight-1 has completed it's mission. The first ever Indian private sector launch has been successfully completed. #Vikram1 #MissionAagaman #OpeningSpaceForAll

Dear @DrJitendraSingh @GoenkaPk , last time Skyroot launched (successfully) at the post launch we saw both of you in what looked liked an attempt to take credit and putting founders behind i know the justification is you'll wanted them in frame, the intention was good, but the optics of the same were horrible, We all have grown up hearing stories how Satish Dhawan took all of the criticism and shielded Dr Kalam from media criticism , what we saw at sky pc is complete opposite, this is not ISRO culture If they succeed move away, let them have their limeliight, if they fail, shield them , take the credit, sit in the middle or whatever, i know both of youll have done a lot to make this happen, but then its your job, its why you're appointed/elected. a lot of young ones are looking at this, dont set a bad example

@phpandya28 Hell yeah 🔥

+1k pads +1k vias (Blind and Burried included) +1k track segment 8 layers My most complex PCB board is in final stage. It will be ready in day or two and will be shipped before end of week. Wish me luck!

The way science is done is changing faster than most people realize.

Susskind about the human side of physics: The whole business... it's a very human business. People don't agree. They disagree, they fight. They sometimes, even on the nasty side, not usually. And it's a very human business. The conflict of principle can sometimes turn out to be a conflict between people. It's like anything else in the world. Physicists are not immune from the human passions, shall we say. So [people] get the idea that physics is simple because it's either right or wrong. That may be true in the end of the day. In the end of the day there's a little kernel of truth which doesn't go away. Newton's laws are not gonna go away. But at the time when these things are being created, it's like anything else, any other human endeavor. There are all sorts of conflicts. There are all sorts of passions. There are angers. There's the opposite of angers.

All five gold. A few days ago, I recorded a conversation with @raghumahajan. After the cameras were off, we somehow drifted into talking about the Olympiad ecosystem in India -the teachers, mentors, problem setters, training camps, and the people who dedicate years to preparing these students. Nobody knows their names. They're not on anyone's radar. They just keep showing up and doing the work. Results like this don't appear out of nowhere. They're built quietly, over thousands of hours, by people who care deeply about physics and about teaching it well. This is what the future of physics in India looks like.

Shiraz Minwalla explains how confusion in the 1960s led to the birth of string theory. >Veneziano was not thinking about gravity. It was really born as an attempt to understand strong interactions. Shiraz Minwalla is a theoretical physicist and professor at the Tata Institute of Fundamental Research (TIFR), Mumbai. He works on string theory, quantum field theory, and the AdS/CFT correspondence, and co-discovered the fluid-gravity correspondence connecting Einstein's equations to relativistic hydrodynamics.

Feynman: >~< Schwinger: Really hard math Tomanaga: Super Many-Time Theory Dyson:

Landau and Lifshitz assume you're either a genius or you'll figure out you're not.

@AtharvDubey206 Would love to use it:) Congratulations

XY stage is just one of its application, the underlying tech has potential to make your phone's camera better, make your glasses better, make DNA related research accessible and the list goes on. We can see new types of devices being made which we were not possible before.

Whatever drama attaches to it now belongs to the forty eight years between the page and a half in 1964 and the July morning in 2012 when two detectors at CERN, independently, found the bump in the data that the wine bottle potential had promised all along.

In the autumn of 1964, a physicist at the University of Edinburgh named Peter Higgs submitted a short paper to Physics Letters. It was rejected. Not for being wrong, the reviewers do not seem to have found an error in it, but for being, in their judgment, of no obvious relevance to physics. Higgs added two sentences pointing out a consequence the referees had apparently missed, and sent the revised paper instead to Physical Review Letters, where it appeared under the title "Broken Symmetries and the Masses of Gauge Bosons." It ran to a page and a half. It would take the better part of half a century, a machine twenty seven kilometers in circumference, and several thousand physicists to confirm what those two sentences were pointing at. The problem the paper addressed is easy to state and was, at the time, close to a scandal. Gauge theories were beautiful. They explained electromagnetism with a symmetry so rigid that it seemed to leave no freedom for tinkering, and physicists wanted the same rigor to describe the forces that operate inside the nucleus. But there was an obstacle that looked, on the face of it, fatal. The mathematics of gauge invariance insists that the force carrying particles be massless, like the photon. The particles known to carry the weak force were not. Nature, evidently, had already broken the rule the theorists wanted to enforce. Higgs's move, and it is worth saying that Robert Brout and François Englert had arrived independently at much the same idea only weeks earlier, with Gerald Guralnik, C.R. Hagen, and Tom Kibble close behind, was not to abandon the symmetry but to hide it. He introduced a scalar field filling all of space, governed by a potential shaped less like a bowl than like the bottom of a wine bottle, a hump at the center, a trough running around it. A field sitting at the top of the hump respects the full symmetry of the theory. A field that has rolled down into the trough does not, even though the underlying law still does. The vacuum itself, the emptiest possible state, becomes the thing that breaks the symmetry, quietly, without anyone having to break it by hand. What happens next is the part that had gone unnoticed, or been dismissed as a technical curiosity, in earlier work on spontaneous symmetry breaking. Goldstone's theorem said that breaking a continuous symmetry should produce a massless, spinless particle, a promise that seemed to litter the theory with unwanted new particles no one had ever seen. Higgs's contribution was to show that when the broken symmetry is a local gauge symmetry, rather than a global one, the Goldstone boson does not survive as an independent particle at all. It is absorbed, physicists still use the slightly whimsical verb "eaten," by the gauge boson, which promptly acquires the longitudinal polarization state that a massless particle is forbidden to have and a massive one requires. The bill for that transaction is paid in mass, proportional to the vacuum expectation value of the field and to the strength of the coupling. The gauge boson gets heavy. The symmetry survives, encoded rather than displayed. And there is a remainder, an excitation of the field around its new resting point, a genuine, massive, scalar particle, which is what everyone means when they now say "the Higgs." Higgs seems to have understood, in a way his critics initially did not, that this was the whole point, not a footnote about vacuum structure, but a mechanism sturdy enough to carry the electroweak theory that Weinberg and Salam would build on it a few years later, and renormalizable enough, as 't Hooft would later prove, to be trusted with actual calculations rather than treated as a formal trick. The paper does not linger on any of this. It states the mechanism, notes the consequence its referee had missed, and stops.

I found recordings of Strings 2026 on YouTube, and the sound quality is good. I'll probably repost Strings 2026 again. Here are the event playlists. youtube.com/playlist?list=…

The generation that got the most out of these schemes is now sitting as full professors. Maybe they never had to think about affordability once they got in. Maybe calling out DST funding decisions is just not worth the career risk. Either way, the silence says a lot. Institutions don't collapse because they run out of money. They collapse when the people who should've spoken up... don't.

When IISERs first started, they used to pay scholarships to every student. Then those scholarships ceased, but students who earned KVPY or DST Inspire fellowships received financial support. Then KVPY was stopped. Now it appears that DST Inspire is gone too👇 Meanwhile the fees have continued to go up. Now it’s close to 60K per semester. Slowly but surely IISERs are being put beyond the reach of financially weak but talented Indian students. We have barely heard a word of protest from Indian academics on this.

I haven't marked even a single dot in any page of any book (the library of my future generations)

@star_stufff 🥵

probably the most based linkedin profile

One of Amal Kumar Raychaudhuri's quiet turning points came in 1957. A letter from Germany, from a friend, saying two physicists (Pascual Jordan, a founder of quantum mechanics himself, and Otto Heckmann) had cited his paper. Not a prize. Not a job offer. Just a citation.

@phpandya28 Yes 💯 Delhi me bhi

I want this in India Which area in BLR should have this ? Indiranagar, HSR layout, Koramangala have bunch of AI bros...were are all hardware people?

The documentary was produced jointly by Vigyan Prasar and Inter-University Centre for Astronomy and Astrophysics (IUCAA), Pune.

Amal Kumar Raychaudhuri wanted mathematics. He was already working through an algebra book on his own, before the class had even gotten there, just because he liked solving the problems. "I went over to physics rather than mathematics. The reason was very practical. My father told me that although I got a first class in mathematics, I was not a success in practical life, so think about studying some other subject rather than mathematics. And that is why I switched over to physics." A father worried about practicality ended up redirecting one of the more impractical, beautiful pieces of theoretical physics of the century.