Indistinguishability of photonic qubits emitted from trapped 40Ca+ ions via pulsed excitation
Abstract
We investigate the indistinguishability of Raman photons generated from two trapped 40Ca+ 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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