113 citations · 560 across the 40 of their papers we have counts for
41 papers
Eigenstate thermalization at the edge of the many-body spectrum
Arnav Pushkar, Pranay Patil, Soumya Bera +2
It is well-known that thermalization breaks down in presence of an extensive number of symmetries or conservation laws that are mutually compatible or commuting with each other. We…
Diodes and capacitors for the transport of monopoles in fragmented spin ice
Anoop Raj, Sumiran Pujari, Ludovic D. C. Jaubert
Spin-ice materials are famous for their quasi-particle excitations that behave like magnetic monopoles. Magnetricity is the concept that these monopoles can conduct an AC magnetic…
Critical SO(5) scaling of entanglement entropy at honeycomb lattice deconfined criticality
Sankalp Kumar, Jonathan D'Emidio, Sumiran Pujari
The deconfined quantum critical point (DQCP) in square lattice S=1/2 quantum antiferromagnets has been extensively studied with a large body of evidence pointing to a weakly first-…
Toric code made subsystem: a framework for topological subsystem codes using anticommuting quantum spin liquids
Vaibhav Sharma, Sumiran Pujari
We introduce a framework of constructing topological subsystem codes based on the class of anticommuting quantum spin liquids described in [Phys. Rev. B 113, 064402 (2026)]. A cano…
«Anticommuting» quantum spin liquids
Sumiran Pujari, Harsh Nigam
We discuss a class of lattice quantum Hamiltonians with bond-dependent Ising couplings and a mutually «anticommuting» algebra of extensively many local $\mathbb{Z}_…
Pseudocriticality in antiferromagnetic spin chains
Sankalp Kumar, Sumiran Pujari, Jonathan D'Emidio
Weak first-order pseudocriticality with approximate scale invariance has been observed in a variety of settings, including the intriguing case of deconfined criticality in 2+1 dime…
Rational Control of Magnonic and Electronic Band Splittings
Subhadeep Bandyopadhyay, Anoop Raj, Philippe Ghosez +2
We provide a theoretical demonstration of controllable non-relativistic spin splitting in both electronic and magnonic bands via targeted structural distortions tied to specific ph…
Tomonaga-Luttinger liquid and quantum criticality in spin-1/2 antiferromagnetic Heisenberg chain C14H18CuN4O10 via Wilson ratio
Sharath Kumar Channarayappa, Sankalp Kumar, N. S. Vidhyadhiraja +9
The ground state of a one-dimensional spin-1/2 uniform antiferromagnetic Heisenberg chain (AfHc) is a Tomonaga-Luttinger liquid which is quantum-critical with respect to applied ma…
Transverse resistance due to electronic inhomogeneities in superconductors
Shamashis Sengupta, Alireza Farhadizadeh, Joe Youssef +8
Phase transitions in many-body systems are often associated with the emergence of spatial inhomogeneities. Such features may develop at microscopic lengthscales and are not necessa…
A theorem on extensive ground state entropy, spin liquidity and some related models
Sumiran Pujari
An exact mechanism is written down to guarantee extensive residual ground state entropy and spin liquidity in spin-1/2 lattice models with bond-dependent couplings. It is based on…
A Class of Exactly Solvable Hamiltonians for S=1/2 Quantum Magnets with Spinless Fermionic Excitations in Higher Dimensions
Sumiran Pujari
This contribution summarizes the main results of a work on exactly solvable Hamiltonians for quantum magnets. A class of Hamiltonians which supports fractionalized spinless fermion…
A solvable embedding mechanism for one-dimensional spinless and Majorana fermions in higher-dimensional spin-1/2 magnets
Sumiran Pujari
We write down a class of two-dimensional quantum spin-1/2 Hamiltonians whose eigenspectra are exactly solvable via the Jordan-Wigner transformation. The general structure correspon…
(H,Li)RuO : a possible zero-field Ru-based Kitaev Quantum Spin Liquid
Sanjay Bachhar, M. Baenitz, Hubertus Luetkens +3
We report the synthesis and properties of (H,Li)RuO, which is shown to be a system made out of Ru moments in a honeycomb geome…
Deconfined pseudocriticality in a model spin-1 quantum antiferromagnet
Vikas Vijigiri, Sumiran Pujari, Nisheeta Desai
Berry phase interference arguments that underlie the theory of deconfined quantum criticality (DQC) for spin- antiferromagnets have also been invoked to allow for cont…
Notes on resummation-based quantum Monte Carlo vis-à-vis sign-problematic Heisenberg models on canonical geometrically frustrated lattices
Nisheeta Desai, Sumiran Pujari
We show here that a direct application of resummation-based quantum Monte Carlo (QMC) -- implemented recently for sign-problem-free SU(2)-symmetric Hamiltonians in the stochastic s…
Punctured-Chern topological invariants for semi-metallic bandstructures
Ankur Das, Eyal Cornfeld, Sumiran Pujari
Topological insulator-based methods underpin the topological classification of gapped bands, including those surrounding semi-metallic nodal defects. However, multiple bands with g…
Decoupling Nuclear Spins via Interaction-Induced Freezing in Nitrogen Vacancy Centers in Diamond
Abhishek Kejriwal, Dasika Shishir, Sumiran Pujari +1
Nitrogen-Vacancy (NV) centers in diamonds provide a room-temperature platform for various emerging quantum technologies, e.g. the long nuclear spin coherence times as potential qua…
Unusual spin dynamics in the low-temperature magnetically ordered state of AgLiIrO
Atasi Chakraborty, Vinod Kumar, Sanjay Bachhar +7
Recently, there have been contrary claims of Kitaev spin-liquid behaviour and ordered behavior in the honeycomb compound AgLiIrO based on various experimental signature…
Resummation-based updates for Stochastic Series Expansion Quantum Monte Carlo
Nisheeta Desai, Sumiran Pujari
For spin rotational symmetric models with a positive-definite high-temperature expansion of the partition function, a stochastic sampling of the series expansion upon partial resum…
Size Dependence in Flux-Flow Hall Effect using Time-Dependent Ginzburg-Landau Equations
Vineet Punyamoorty, Aditya Malusare, Shamashis Sengupta +2
We study the Hall effect in square, planar type-II superconductors using numerical simulations of time dependent Ginzburg-Landau (TDGL) equations. The Hall field in some type-II su…
Role of Majorana Fermions in high-harmonic generation from Kitaev chain
Adhip Pattanayak, Sumiran Pujari, Gopal Dixit
The observation of Majorana fermions as collective excitations in condensed-matter systems is an ongoing quest, and several state-of-the-art experiments have been performed in the…
Gapless quantum spin liquid in the triangular system SrCuSbO
S. Kundu, Aga Shahee, Atasi Chakraborty +9
We report gapless quantum spin liquid behavior in the layered triangular SrCuSbO (SCSO) system. X-ray diffraction shows superlattice reflections associated with a…
Colorful points in the XY regime of XXZ quantum magnets
Santanu Pal, Prakash Sharma, Hitesh J. Changlani +1
In the XY regime of the XXZ Heisenberg model phase diagram, we demonstrate that the origin of magnetically ordered phases is influenced by the presence of solvable points with exac…
Bilayer Coulomb phase of two dimensional dimer models: Absence of power-law columnar order
Nisheeta Desai, Sumiran Pujari, K. Damle
We study the fully-packed dimer model on the bilayer square lattice with fugacity equal to () for inter-layer (intra-layer) dimers, and intra-layer interaction between n…