19 papers
Sum rules and density-wave modes in spin-singlet fractional quantum Hall fluids
Ritajit Kundu, Rakesh K. Dora, Dung Xuan Nguyen +1
Fractional quantum Hall (FQH) states are prototypical examples of strongly interacting topologically ordered systems. In this work, we obtain thermodynamic fits on the plane for th…
Skyrmion Excitations in the Quantum Hall state in Monolayer Graphene
Jincheng An, Ajit C. Balram, Ganpathy Murthy
We investigate the skyrmion excited states atop the quantum Hall ferromagnetic ground state at filling factor in monolayer graphene. The competition among short-ran…
Even-denominator fractional quantum Hall states in the zeroth Landau level of ABA trilayer graphene
Tanima Chanda, Simrandeep Kaur, Harsimran Singh +6
The paper reports the observation of robust even‑denominator fractional quantum Hall states in the zeroth Landau level of ABA trilayer graphene, linking their stability to inversio…
Testing the robustness of topological quantities evaluated from the modular Hamiltonian for a given wavefunction
Sandeep Sharma, Ajit C. Balram
Topologically ordered states are characterized by topological quantities like the Hall conductance, topological entanglement entropy, and chiral central charge. Techniques based on…
Static structure factor and the dispersion of the Girvin-MacDonald-Platzman density mode for fractional quantum Hall fluids on the Haldane sphere
Rakesh K. Dora, Ajit C. Balram
We study the neutral excitations in the bulk of the fractional quantum Hall (FQH) fluids generated by acting with the Girvin-MacDonald-Platzman (GMP) density operator on the unifor…
Dispersion of collective modes in spinful fractional quantum Hall states on the sphere
Rakesh K. Dora, Ajit C. Balram
Collective modes capture the dynamical aspects of fractional quantum Hall (FQH) fluids. Depending on the active degrees of freedom, different types of collective modes can arise in…