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Fourth-order perturbation theory for the Frohlich polaron: Analytic structure of the weak-coupling series and the crossover to strong coupling
Sankar Das Sarma
We calculate the Rayleigh-Schrodinger perturbation series for the ground-state energy and the effective mass of the three-dimensional Frohlich polaron through fourth order in the c…
Exchange self-energy and vertex corrections to static screening in the two-dimensional electron gas
Sankar Das Sarma
We compute analytically the leading beyond-ring corrections to the static irreducible polarizability of the two-dimensional (2D) electron gas, namely the two exchange self-energy d…
Disorder-driven loss of crystalline coherence in two-dimensional electron solids: Quantum Hartree-Fock and classical molecular dynamics
Sankar Das Sarma, Haining Pan
We investigate the effects of quenched disorder on two-dimensional electron solids using Hartree-Fock theory and classical molecular dynamics. Increasing disorder weakens crystalli…
Scaling of qubit coherence in quantum dot based Majorana chains: Rabi and Ramsey oscillations of Majorana qubits formed by four and six quantum dots
Haining Pan, Sankar Das Sarma
We present a theoretical study of the Rabi and Ramsey coherence time of Majorana-based qubits formed by double -site quantum-dot artificial Kitaev chains, following the recent e…