Rubidium transition (IMAGE)

Optica

Rubidium transition

Caption

Researchers have developed an optical atomic clock that uses a frequency comb to directly excite a two-photon transition in rubidium-87 atoms. When photons are sent from opposite directions, the effect of motion on one of these photons cancels any motion effects on the other photon, allowing the use of hot atoms

Credit

Jason Jones, University of Arizona

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