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229 papers
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…
Apparent inconsistency between Streda formula and Hall conductivity in reentrant integer quantum anomalous Hall effect in twisted MoTe
Yi Huang, Seth Musser, Jihang Zhu +2
Recent experiments in twisted bilayer MoTe (tMoTe) have uncovered a rich landscape of correlated phases. In this work, we investigate the reentrant integer quantum anomalou…
Singlet-only Always-on Gapless Exchange Qubits with Baseband Control
Nathan L. Foulk, Silas Hoffman, Katharina Laubscher +1
We propose a singlet-only always-on gapless exchange (SAGE) spin qubit that encodes a single qubit in the spins of four electrons while allowing universal baseband control. While c…