1.5k citations · 17.9k across the 190 of their papers we have counts for
191 papers
On Rare Nonresonant Regions and Subdiffusive Transport in an Interacting Disordered Quantum Chain
A. Scardicchio, S. L. Sondhi
We study rare nonresonant regions in a canonical one-dimensional disordered quantum spin chain by directly implementing the iterated Schrieffer-Wolff construction underlying the re…
Measuring Semantic Abstractness of SAE Features via Nonlocality
Chuqiao Lin, Shivaji Sondhi, Xiao-Liang Qi
Sparse autoencoders (SAEs) have helped uncover mechanistic explanations for LLM behaviours such as reasoning, jailbreaking etc., via understanding the corresponding task-relevant a…
Machian fractons, Hamiltonian attractors and non-equilibrium steady states
Abhishodh Prakash, Ylias Sadki, S. L. Sondhi
We study the fracton problem in classical mechanics, with fractons defined as point particles that conserve multipole moments up to a given order. We find that the nonlinear Ma…
Quantum tasks assisted by quantum noise
Chuqiao Lin, Vir B. Bulchandani, Shivaji L. Sondhi
We introduce a notion of expected utility for quantum tasks and discuss some general conditions under which this is increased by the presence of quantum noise in the underlying res…
Classical Non-Relativistic Fractons
Abhishodh Prakash, Alain Goriely, S. L. Sondhi
We initiate the study of the classical mechanics of non-relativistic fractons in its simplest setting - that of identical one dimensional particles with local Hamiltonians characte…
50 years of quantum spin liquids
Steven A. Kivelson, Shivaji Sondhi
In 1973, Philip Anderson published a paper introducing the resonating valence bond state, which can be recognized in retrospect as a topologically ordered phase of matter - one tha…