My Research Journey
Research Experience
Research on Hole Spin Qubits
• Studied dephasing time in planar Ge hole qubits under single charge noise using Schrieffer-Wolff perturbation theory, comparing analytical results to numerical simulations and highlighting the anisotropic behavior in terms of magnetic field orientation.
• We studied the impact of 1/f charge noise, modeled as an ensemble of Coulomb potentials, on the dephasing time of Ge hole spin qubits in the presence of a magnetic field.
Link to paper
Transport in hole system
We identify a significant non-linear anomalous Hall effect in the electrical response of spin-3/2 heavy holes in zincblende semiconductor nanostructures. This effect stems from a quadrupole interaction with the electric field, made possible by Td-symmetry.
Link to paper
Topological ladder model
We construct a one-dimensional topological ladder model analogous to the Kane-Mele model in two dimensions. The model starts with a Creutz ladder and is modified to allow gap closures at specific points in k-space. We then couple two of these models, one for each spin channel, and add a Rashba spin-orbit coupling term to restore time-reversal invariance. The resulting model, which falls into the CII symmetry class, exhibits a quantized quantum spin Hall (QSH) response characterized by spin currents that flow along the edges of the ladder.
Link to paper
