Resource-efficient dissipative entanglement of two trapped-ion qubits

Abstract

We demonstrate a simplified method for dissipative generation of an entangled state of two trapped-ion qubits. Our implementation produces its target state faster and with higher fidelity than previous demonstrations of dissipative entanglement generation and eliminates the need for auxiliary ions. The entangled singlet state is generated in $\sim$7 ms with a fidelity of 0.949(4). The dominant source of infidelity is photon scattering. We discuss this error source and strategies for its mitigation.

arXiv comment12 pages, 6 figures

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• Nonunitary Gate Operations by Dissipation Engineering
• Quantum optimal control in quantum technologies. Strategic report on current status, visions and goals for research in Europe