Spontaneous emission tus
Tshaj tawm mus tas li, tseem hu ua spontaneous emission thiab quantum kev hloov pauv, yog txheej txheem ntawm lub teeb atoms. Atoms tau zoo siab hloov los ntawm qib qis zog mus rau theem siab zog. Atoms hauv qib siab zog (lub xeev zoo siab) tsis ruaj khov. Tsis muaj ib qho kev cuam tshuam sab nraud, lawv yuav ua nthawv thiab ywj pheej rov qab los ntawm theem siab zog mus rau theem qis zog, thaum tso cov duab photon nrog lub zog hν=E2-E1. Tus txheej txheem no ntawm kev xa cov duab yav tom ntej los ntawm lub xeev zoo siab mus rau lub zog qis dua lub xeev yog hu ua kev tshwm sim los ntawm kev tshaj tawm. Cov txheej txheem hluav taws xob uas ua kom zoo dua ntawm cov atoms kom nthawv hloov mus rau qis zog ntawm lub zog. Cov hluav taws xob hauv qhov hluav taws xob atom ntawm theem siab zog E2 feem ntau yuav tsum hloov mus rau qhov qis dua theem zog E1, thiab tib lub sijhawm ua rau hluav taws xob tsis muaj hluav taws xob nrog lub zog E2-E1. Yog tias tus txheej txheem no tau ntwm dhau ntawm qhov tsis muaj feem ntawm lwm yam, nws hu ua nthawv hluav taws xob. Nws yog lub luminous mechanism ntawm cov teeb pom kev zoo tib yam.