Abstract The implementation of high fidelity two-qubit gates is a bottleneck in the progress toward universal quantum computation semiconductor dot qubits. We study capacitive coupling between two triple spin qubits encoded S = 1/2, z ?1/2 decoherence-free subspace—the exchange-only (EO) report exact gate sequences for CPHASE and CNOT gates, demonstrate theoretically, existence multiple sweet s...
