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Krylov Complexity and Quantum Many-body Scars in Non-Hermitian Kinetically Constrained Models
Arkaprava Sil, Rudraksh Kaushik, Souvik Kundu +2
Thermalization in closed quantum systems and its breakdown are central to understanding the emergence of statistical behavior in isolated many-body systems. Kinetic constraints can…
Confinement-deconfinement transitions in the dimer-loop models on two-dimensional non-bipartite lattices
Jay Pandey, Souvik Kundu, Kedar Damle
Recent work [Kundu, Damle, Phys. Rev. X 15, 011018 (2025)] has demonstrated that a class of kagome lattice antiferromagnets with competing anisotropies can exhibit unusual lo…
Vacancy-induced local moments in quantum paramagnetic phases: An SU() designer Hamiltonian study
Md Zahid Ansari, Souvik Kundu, Kedar Damle
We explore the effects of non-magnetic impurities (vacancy disorder) on the quantum paramagnetic phases stabilized by SU() designer Hamiltonians on bipartite lattices. Using the…
Arrested Relaxation in a Disorder-Free Coulomb Spin Liquid
Souvik Kundu, Arnab Seth, Sthitadhi Roy +2
We investigate Coulomb spin liquids in classical spin-3/2 ice and show that the enlarged on-site Hilbert space gives rise to a qualitatively new class of such phases. Beyond the co…
confined and deconfined Coulomb liquids in pyrochlore magnets
Jay Pandey, Souvik Kundu, Kedar Damle
We identify an interesting regime in the physics of pyrochlore magnets in which spin-orbit and crystal field effects lead to {\em two} low-lying magnetic doublets that can be model…