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研究了奇、偶相干态的Wehrl熵和Shannon熵,结果表明,其Wehrl熵随总噪声的增加而增大,并趋向同一个常数。Shannon熵随力学量起伏的减小而减小,且这两种态的Shannon熵均可小于相干态的Shannon熵,但这时并不与压缩效应的出现相对应,因而Shannon熵不能成为压缩存在的判据。
The Wehrl entropy and Shannon entropy of odd and even coherent states are studied. The results show that the Wehrl entropy increases with the increase of the total noise and tends to the same constant. Shannon entropy decreases with the decrease of the amount of dynamics, and the Shannon entropy of both states can be smaller than the Shannon entropy of coherent states, but this time does not correspond to the compression effect, so Shannon entropy can not be compressed Criteria.