Tunable Hybrid Qubit in a GaAs Double Quantum Dot
Tunable Hybrid Qubit in a GaAs Double Quantum Dot
We experimentally demonstrate a tunable hybrid qubit in a five-electron GaAs double quantum dot. The qubit is encoded in the (1,4) charge regime of the double dot and can be manipulated completely electrically. More importantly, dot anharmonicity leads to quasiparallel energy levels and a new anticrossing, which help preserve quantum …