ultralow-threshold laser

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Raman laser — The Raman laser is a byproduct of Raman scattering, discovered in 1928 by Nobel laureate Chandrasekhara Venkata Raman and Kariamanickam Srinivasa Krishnan in liquids and independently by Grigory Landsberg and Leonid Mandelshtam in crystals. When… … Wikipedia
Bose–Einstein condensate — A Bose–Einstein condensate (BEC) is a state of matter of bosons confined in an external potential and cooled to temperatures very near to absolute zero (val|0|u=K, val| 273.15|u=°C, or val| 459.67|u=°F ). Under such supercooled conditions, a… … Wikipedia

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