简并双光子过程中两能级原子的消相干

Decoherence of two level atom in degenerate two photon processes

:两能级原子置于外部环境 (热库 )时 ,将两能级原子视为量子位 ,通过分析简并双光子过程中量子位约化密度算符非对角元的时间演化 。

The two level atom is regarded as quantum bit when the two level atom is put in a thermal reservoir.The time evolution properties of non opposite angle element of quantum bit's reducible density rectangular array is discussed and decoherence of quantum bit is studied.