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%.

6 pages, 4 figures

References in corpus (6)

• Demonstration of Entanglement of Electrostatically Coupled Singlet-Triplet Qubits
• Quantum gates between capacitively coupled double quantum dot two-spin qubits
• Average Fidelity in n-Qubit systems
• Two-Qubit Pulse Gate for the Three-Electron Double Quantum Dot Qubit
• Directly accessible entangling gates for capacitively coupled singlet-triplet qubits
• Quantum computation with three-electron double quantum dots at an optimal operation point

Cited by in corpus (1)

• High-Fidelity Entangling Gates for Quantum-Dot Hybrid Qubits Based on Exchange Interactions