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A key challenge for semiconductor quantum-dot charge qubits is therealization of long-range qubit coupling and performing high-fidelity gatesbased on it. Here, we describe a new type of charge qubit formed by an electronconfined in a triple-quantum-dot system, enabling single and two-qubit gatesworking in the dipolar and quadrupolar detuning sweet spots. We further presentthe form for the long-range dipolar coupling between the charge qubit and thesuperconducting resonator. Based on the hybrid system composed of the qubitsand the resonator, we present two types of entangling gates: the dynamicaliSWAP gate and holonomic entangling gate, which are operating in the dispersiveand resonant regimes, respectively. We find that the fidelity for the iSWAPgate can reach fidelity higher than 99\% for the noise level typical inexperiments. Meanwhile, the fidelity for the holonomic gate can surpass 98\% ifthe anharmonicity in the resonator is large enough. Our proposal offers analternative useful way to build up high-fidelity quantum computation for chargequbits in semiconductor quantum dot.

Coupling two charge qubits via a superconducting resonator operating in the resonant and dispersive regimes