TAN WEI-HAN, WANG XUE-WEN, XIE CHENG-GANG, ZHANG GUAN-MEI. QUANTUM THEORY OF A DAMPED HARMONIC OSCILLATOR SIMULATING LASER OPEN SYSTEMJ. Acta Physica Sinica, 1982, 31(11): 1569-1575. DOI: 10.7498/aps.31.1569