Double-occupancy errors, adiabaticity, and entanglement of spin qubits in quantum dots
Double-occupancy errors, adiabaticity, and entanglement of spin qubits in quantum dots
Quantum gates that temporarily increase singlet-triplet splitting in order to swap electronic spins in coupled quantum dots, lead inevitably to a finite double-occupancy probability for both dots. By solving the time-dependent Schr\"odinger equation for a coupled dot model, we demonstrate that this does not necessarily lead to quantum computation errors. …