19 citations · 45 across the 6 of their papers we have counts for
6 papers
Emergent criticality in a constrained boson model
Anirudha Menon, Anwesha Chattopadhyay, K. Sengupta +1
We show, via explicit computation on a constrained bosonic model, that the presence of subsystem symmetries can lead to a quantum phase transition (QPT) where the critical point ex…
Strong Hilbert space fragmentation via emergent quantum drums in two dimensions
Anwesha Chattopadhyay, Bhaskar Mukherjee, K. Sengupta +1
We introduce a disorder-free model of spins on the square lattice in a constrained Hilbert space where two up-spins are not allowed simultaneously on any two neighboring si…
Interplay of mass imbalance and frustration in correlated band insulators
Anwesha Chattopadhyay
We report the emergence or broadening of exotic magnetic metallic phases upon explicit breaking of symmetry by introduction of mass imbalance in a variant of Hubbard model,…
Unconventional superconductivity in a strongly correlated band-insulator without doping
Anwesha Chattopadhyay, H. R. Krishnamurthy, Arti Garg
We present a novel route for attaining unconventional superconductivity (SC) in a strongly correlated system without doping. In a simple model of a correlated band insulator (BI) a…
Gutzwiller projection for exclusion of holes: Application to strongly correlated Ionic Hubbard Model and Binary Alloys
Anwesha Chattopadhyay, Arti Garg
We consider strongly correlated limit of variants of the Hubbard model (HM) in which on parts of the system it is energetically favourable to project out doublons from the low ener…
Is there a superconducting phase in the half-filled ionic Hubbard model ?
Anwesha Chattopadhyay, Soumen Bag, H. R. Krishnamurthy +1
We investigate the ionic Hubbard model (IHM) at half-filling in the limit of strong correlations and large ionic potential. The low energy effective Hamiltonian in this limit, obta…