Rapid adiabatic gating for capacitively coupled quantum dot hybrid qubits without barrier control

Abstract

We theoretically examine the capacitive coupling between two quantum dot hybrid qubits, each consisting of three electrons in a double quantum dot, as a function of the energy detuning of the double dot potentials. We show that a shaped detuning pulse can produce a two-qubit maximally entangling operation in $\sim$50ns without having to simultaneously change tunnel couplings. Simulations of the entangling operation in the presence of experimentally realistic charge noise yield two-qubit fidelities over 90%.

arXiv comment6 pages, 4 figures

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Cited by in corpus (3)

• Adiabatic two-qubit gates in capacitively coupled quantum dot hybrid qubits
• High-Fidelity Entangling Gates for Quantum-Dot Hybrid Qubits Based on Exchange Interactions
• Robust entangling gate for capacitively coupled few-electron singlet-triplet qubits