During a pulse, the first photon, called"the herald," was observed with a highly sensitive detector, signaling its partner photon's arrival, which interacted with LH2 molecules in a laboratory sample of the purple bacteria.
In nature, this energy transfer would continue until it started the process of photosynthesis. Finding a photon with a wavelength of 850 nanometers in the laboratory was a clear sign that that process had begun, especially as the LH2 structures were separated from other parts of the cell. "I think the first thing is that this experiment has shown that you can actually do things with individual photons,"Using a probability distribution model and a computer algorithm, the team analyzed over 17.7 billion herald photon detection events and 1.6 million fluorescent photon detection events.
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