Direct spectroscopic observation of quantum jumps of a single molecule

Single Molecule Detection: Quantum jumps, rotation, switching

Early observations of macroscopic quantum jumps in single atoms

Observation of quantum jumps in a single barium ion (A)

‘Quantum jumps’ observed in the fluorescence of a single ion

“Quantum jumps” observed in single-ion fluorescence

Observations of anomalous ?quantum jumps? in a single ion trap