Experimental demonstration of a quantum repeater segment with co-trapped 40Ca+ ions using telecom photon interference over 440 m fiber, achieving ≥68(8)% Bell state fidelity.
Indistinguishability of photonic qubits emitted from trapped $^{40}$Ca$^+$ ions via pulsed excitation
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abstract
We investigate the indistinguishability of Raman photons generated from two trapped $^{40}$Ca$^+$ ions using few-nanosecond excitation pulses. We elucidate how spontaneous scattering back to the initial state affects Hong-Ou-Mandel interference. We identify the mean number of back-decays as a measurable single-emitter quantity that correlates with achievable interference visibility of photons from two identical emitters.
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quant-ph 1years
2026 1verdicts
UNVERDICTED 1representative citing papers
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Quantum repeater segment with free-space coupled co-trapped ions using telecom photon interference
Experimental demonstration of a quantum repeater segment with co-trapped 40Ca+ ions using telecom photon interference over 440 m fiber, achieving ≥68(8)% Bell state fidelity.