Quantum dot qubits with quadrupolar geometry
ORAL
Abstract
Robust implementations of semiconducting quantum dot qubits must overcome the effects of charge noise that currently limit coherence during gate operations. Here, I describe a scheme for protecting solid-state qubits from uniform electric field fluctuations with a specific physical implementation: a quadrupole qubit in a triple quantum dot. The unique design of the quadrupole qubit enables particularly simple pulse sequences for suppressing the effects of noise during gate operations. Finally, I will discuss an advanced implementation of the quadrupole qubit where the spin and the charge degrees of freedom are hybridized in order to generate a very wide sweet spot that can provide even stronger protection against charge noise.
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Presenters
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Joydip Ghosh
- Univ of Wisconsin, Madison
- Department of Physics, Univ of Wisconsin, Madison
- Physics, Univ of Wisconsin, Madison