A singlet-only, always-on, gapless exchange qubit in a T-shaped four-dot geometry provides protection from magnetic field gradients and suppressed leakage, improving simulated coherence and gate fidelities in gradient-dominated regimes.
Quantum compu- tation with quantum dots,
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Singlet-only Always-on Gapless Exchange Qubits with Baseband Control
A singlet-only, always-on, gapless exchange qubit in a T-shaped four-dot geometry provides protection from magnetic field gradients and suppressed leakage, improving simulated coherence and gate fidelities in gradient-dominated regimes.