玻色子的相位相干态及其量子涨落

Phase coherent states and its quantum fluctuation for bosons

从Pegg-Barnett的相位态定义出发,推导了一般玻色子的相位相干态表达式,研究了相位相干态的统计特性,并计算了相位的概率分布及量子涨落.结果表明,在相位相干态下大角度的相位出现的概率比较大,其量子涨落也比较大.

From the definition of the phase state by Pegg and Barnett, an expression of phase coherent state for bosons is deduced, us statistical property is investigated and distribution probability and quantum fluctuation of the phase are calculated It is showed that appearance probability and quantum fluctuation of the phase in phase coherent state are biggish when the phase angle is bigger.