26 citations · 84 across the 14 of their papers we have counts for
14 papers
Topologically nontrivial multicritical points
Ranjith R Kumar, Pasquale Marra
Recently, the intriguing interplay between topology and quantum criticality has been unveiled in one-dimensional topological chains with extended nearest-neighbor couplings. In the…
Topological transition between gapless phases in quantum walks
Ranjith R Kumar, Hideaki Obuse
Topological gapless phases of matter have been a recent interest among theoretical and experimental condensed matter physicists. Fermionic chains with extended nearest neighbor cou…
Interacting ground states of moiré ladders
Paban Kumar Patra, Ranjith R. Kumar, Yixuan Huang +1
Moiré materials have emerged as a rich platform for exploring strong correlation effects in low dimensions, with twisted bilayer graphene (TBG) as a paradigmatic example. To distil…
Unconventional quantum criticality in a non-Hermitian extended Kitaev chain
S Rahul, Nilanjan Roy, Ranjith R Kumar +2
We investigate the nature of quantum criticality and topological phase transitions near the critical lines obtained for the extended Kitaev chain with next nearest neighbor hopping…
Topological phase transition between non-high symmetry critical phases and curvature function renormalization group
Ranjith R Kumar, Y R Kartik, Sujit Sarkar
The interplay between topology and criticality has been a recent interest of study in condensed matter physics. A unique topological transition between certain critical phases has…
Physics of emergence beyond Berezinskii-Kosterlitz-Thouless transition for interacting topological quantum matter
Ranjith R Kumar, Sujit Sarkar
An attempt is made to find different emergent quantum phases for interacting topological state of quantum matter. Our study is based on the quantum field theoretical renormalizatio…
Signatures of topological phase transition on a quantum critical line
Ranjith R Kumar, Nilanjan Roy, Y R Kartik +2
Recently topological states of matter have witnessed a new physical phenomenon where both edge modes and gapless bulk coexist at topological quantum criticality. The presence and a…
A Quantum Field Theoretical Study of Correlated Quantum Ising model with Longer Range Interaction
Ranjith R Kumar, Sujit Sarkar
The physics of quantum Ising model (qIm) plays an important role in quantum many body system. We study and present the results of qIm and longer range quantum Ising model (lqIm) in…
A study of topological characterization and symmetries for a quantum simulated Kitaev chain
Y R Kartik, Ranjith R Kumar, S Rahul +1
An attempt is made to quantum simulate the topological classification, such as winding number, geometric phase and symmetry properties for a quantum simulated Kitaev chain. We find…
Topological quantum phase transitions and criticality in a longer-range Kitaev chain
Y R Kartik, Ranjith R Kumar, S Rahul +2
In an attempt to theoretically investigate the quantum phase transition and criticality in topological models, we study Kitaev chain with longer-range couplings (finite number of n…
Multi-critical topological transition at quantum criticality
Ranjith R Kumar, Y R Kartik, S Rahul +1
The investigation and characterization of topological quantum phase transition between gapless phases is one of the recent interest of research in topological states of matter. We…
Majorana Zero Modes and Bulk-Boundary Correspondence at Quantum Criticality
S Rahul, Ranjith R Kumar, Y R Kartik +1
Majorana zero modes are well studied in the gapped phases of topological systems. We investigate Majorana zero modes at the topological quantum criticality in one dimensional topol…
A Study of Curvature Theory for Different Symmetry Classes of Hamiltonian
Y R Kartik, Ranjith R Kumar, S Rahul +1
We study and present the results of curvature for different symmetry classes (BDI, AIII and A) model Hamiltonians and also present the transformation of model Hamiltonian from one…
A Study of Asymptotic Freedom like Behavior for Topological States of Matter
Ranjith Kumar R, Rahul S, Surya Narayan +1
We present results for asymptotic freedom like behavior for the topological state of the helical spin liquid system with finite proximity induced superconducting gap. We derive two…