Rathindra Nath Das

PhD researcher focused on quantum information, holography, and condensed matter physics. If Schrödinger’s cat needs a babysitter, I’m your go-to person! 🐈🔬

[Rathindra Nath Das @rathindra_phy]

@NatRevPhys 3/3

What I find particularly interesting is how this relatively simple construction connects to broader questions in quantum chaos, random matrix theory, and black-hole dynamics.

I tried to give a short introduction to these ideas in the article.

[Rathindra Nath Das @rathindra_phy]

1/3

Happy to share a short Journal Club I wrote for @NatRevPhys on spread complexity: Complexity from minimal state spreading

How much of the spreading of a quantum state is actually generated by the dynamics, rather than by our choice of basis?

https://t.co/QJQUbRNJwG

[Rathindra Nath Das @rathindra_phy]

@NatRevPhys 2/3

Spread complexity answers this by looking for the basis in which the state spreads as little as possible during its evolution. For a time-independent Hamiltonian, this turns out to pick out the Krylov basis.

[Rathindra Nath Das @rathindra_phy]

Huge thanks to my collaborator @QFTlover and everyone who provided feedback during this journey! Would love to hear thoughts from the community on these results.

#QuantumInformation #QuantumComplexity #TheoreticalPhysics #Holography #QuantumGravity #BlackHoles

[Rathindra Nath Das @rathindra_phy]

🎉 Our work on "Krylov Complexity of Purification" just got published in Physical Review Letters! (1) @APSphysics @Uni_WUE
🔗 https://t.co/YauSq5QBMj

[Rathindra Nath Das @rathindra_phy]

We also showed that Krylov complexity obeys a Lloyd-like bound and exhibits subadditivity through mutual complexity measures, which actually enables us to compare with holographic volume complexity predictions. (5)

[Rathindra Nath Das @rathindra_phy]

I'm grateful and fortunate to be conducting my joint postdoctoral research at two of the top 6 institutes in the world: MIT(#1) and the Weizmann Institute of Science(#6). It's a special feeling to see this ranking.

[Weizmann Institute @WeizmannScience]

We're proud to share that the Weizmann Institute of Science has been ranked 6th in the world in the 2025 @cwtsleiden Ranking - a jump of four places from the 2024 ranking and our highest position since the ranking was introduced some two decades ago >> https://t.co/YNbQnHGe0S

[Rathindra Nath Das @rathindra_phy]

@siddharthb_ @puch_ai PhD in theoretical physics, working on quantum complexity, chaos & scalable algorithms. I’d bring my information theory and computational experience to help build interpretable and efficient AI for a billion+ people. Always curious, eager to learn, and ready for new challenges.

[Rathindra Nath Das @rathindra_phy]

Received the Best Poster Award @ct_qmat conference in Dresden for my work on Chaos & Integrability in Triangular Billiards! 🌟 Huge thanks to Prof. Dr. Johanna Erdmenger, Prof. Dr. Vijay Balasubramaniam & Dr. Zhuo-yu Xian for this amazing collaboration.
https://t.co/jxGXGbCJCe

[Francesca Vidotto @francesvidotto.bsky.social @FrancesVidotto]

It's really annoying when people who pretend to do proper dissemination actually spread fake news. And notoriously fake news get a lot of clicks. I really do not understand: it's so simple to at least ask to an actual expert of the field, as in this video.
https://t.co/gRYvC3318K

[Burak Oğuz @QFT_oguz]

Take a look at my short presentation on Rational Conformal Field Theory and Verlinde Operators as part of the DRP Türkiye program. I had a lot of fun and learned a lot, huge thanks to the organizers and my mentor Batuhan Acar.

https://t.co/RmN2OoG5Tu

[MIT CSAIL @MIT_CSAIL]

MIT professor Peter Shor gives advice to aspiring computer science researchers.

Full video: https://t.co/CdQsbmZJLD

[High Energy Physics - Theory Papers @TheoryPapers]

Glauber-Sudarshan States, Wave Functional of the Universe and the Wheeler-De Witt equation. https://t.co/TwJtpba1O4

[Takato Mori @QFTlover]

[2407.19387] BPS Chaos https://t.co/jfp7D6BbiY

[Rathindra Nath Das @rathindra_phy]

Today is a day of light, a celebration of knowledge, and a tribute to those who spread it—our teachers. On this Indian Teacher's Day, I bow to all of them with deep respect and gratitude! #teachersday2024 #teachersdaycelebration

[High Energy Physics - Theory Papers @TheoryPapers]

Emergence of Time from Unitary Equivalence. https://t.co/SqJrjJKXna