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 ~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.