14 papers
Geometry of Noisy Quantum Many-Body Dynamics with Continuous Symmetries: Entanglement and Correlations
Marco Lastres, Sanjay Moudgalya
We study unitary quantum dynamics in noisy Brownian models with global continuous symmetries, such as and , focusing on Rényi entanglement entropies and hydrodynamic…
Absence of hidden analytic conserved quantities in harmonically confined rods
Sahil Kumar Singh, Abhishek Dhar, Sanjay Moudgalya
Systems of hard rods of equal length in a one-dimensional harmonic trap have been observed to exhibit peculiar non-ergodic behavior that might suggest the existence of a novel hidd…
Geometry of Free Fermion Commutants
Marco Lastres, Sanjay Moudgalya
Understanding the structure of operators that commute with identical replicas of unitary ensembles, also known as their -commutants, is an important problem in quantum many-…
Distinct Types of Parent Hamiltonians for Quantum States: Insights from the State as a Quantum Many-Body Scar
Lei Gioia, Sanjay Moudgalya, Olexei I. Motrunich
The construction of parent Hamiltonians that possess a given state as their ground state is a well-studied problem. In this work, we generalize this notion by considering simple qu…
Strong Zero Modes via Commutant Algebras
Sanjay Moudgalya, Olexei I. Motrunich
Strong Zero Modes (SZMs) are (approximately) conserved quantities that result in (approximate) double degeneracies in the entire spectra of certain Hamiltonians, with the Majorana…
Additional quantum many-body scars of the spin- model with Fock-space cages and commutant algebras
Sashikanta Mohapatra, Sanjay Moudgalya, Ajit C. Balram
Quantum many-body scars (QMBS) represent a mechanism for weak ergodicity breaking, characterized by the coexistence of atypical non-thermal eigenstates within an otherwise thermali…