Journal
PHYSICAL REVIEW LETTERS
Volume 124, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.124.110501
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Funding
- U.K. National Physical Laboratory
- U.K. Defence Science and Technology Laboratory
- UKRI FL Fellowship
- U.K. EPSRC Networked Quantum Information Technology Hub
- E.U. Quantum Technology Flagship Project AQTION [820495]
- EPSRC [EP/T001062/1] Funding Source: UKRI
- STFC [ST/M007030/1, ST/K006797/1, ST/J005428/1, ST/M000206/1, ST/I001204/1, ST/F002335/1, ST/K00090X/1, ST/S002308/1, ST/N000668/1, ST/M002853/1, ST/L005573/1] Funding Source: UKRI
- UKRI [MR/S03238X/1] Funding Source: UKRI
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We demonstrate remote entanglement of trapped-ion qubits via a quantum-optical fiber link with fidelity and rate approaching those of local operations. Two Sr-88(+) qubits are entangled via the polarization degree of freedom of two spontaneously emitted 422 nm photons which are coupled by high-numerical-aperture lenses into single-mode optical fibers and interfere on a beam splitter. A novel geometry allows high-efficiency photon collection while maintaining unit fidelity for ion-photon entanglement. We generate heralded Bell pairs with fidelity 94% at an average rate 182 s(-1) (success probability 2.18 x 10(-4)).
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