量子 (Liōng-chú)力學 (la̍t-ha̍k) (quantum mechanics) 是 (sī)1種 (chióng)理論 (lí-lūn)物理學 (bu̍t-lí-ha̍k) (theoretical physics),研究 (gián-kiù)物件 (mi̍h-kiāⁿ)佇 (tī)原子 (goân-chú)佮 (kap)處原子 (chhù-goân-chú)粒子 (lia̍p-chú)層次 (chân-chhù)的 (ê)性質 (sèng-chit); 古典 (kó͘-tián)力學 (classical mechanics) 甘 (ham)古典電磁學 (tiān-chû-ha̍k) (classical electromagnetism) 佇這 (chit)个 (ê)層次攏 (lóng)會 (ē)無效去 (bô-haū--khì)。量子力學是真 (chin)濟 (chē)物理學甘化學 (hoà-ha̍k)理論數學的 (sò͘-ha̍k-te̍k)个地基 (tē-ki),親像 (chhin-chhiūⁿ)講 (kóng)固態 (kò͘-thài)物理學 (solid-state physics),原子物理學,分子 (hun-chú)物理學 (molecular physics),計算 (kè-sǹg)化學 (computational chemistry),量子化學 (quantum chemistry),粒子物理學 (particle physics),原子核 (goân-chú-hu̍t)物理學 (nuclear physics)。量子 力學參 (chham)一般 (it-poaⁿ)相對論 (siong-tùi-lūn) (general relativity) 是現代 (hiān-tāi)物理學的2支 (ki)大柱 (toā-thiāu)。