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Acta Physica Sinica

THE NONCLASSICAL NATURE AND INDEPENDENCE OF HIGHER-ORDER SQUEEZING OF LIGHT FIELD

Xia Yun-Jie, Guo Guang-Can, (1)曲阜师范大学物理系,曲阜,273165; (2)中国科学技术大学物理系,合肥,230026

Published Jan 1, 1990• 0 citations
Publisher

Abstract

In this paper, the higher-order squeezing of a single mode light field state ｜ψ>=α｜0>+β｜m>(m>2) is studied. When m is even integral,we find that it exhibits arbitary higher-order squeezing except second order squeezing. But the higher-order squeezing and antibunchinf; do not appear simultaneously- Thus, we come to a conclusion that higher-order squeezing is a new nonclassicl effect of light field which is independent of second order squeezing and antibunching.

DOI
10.7498/aps.39.54-2

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We study the multimode higher-order nonclassical effects of novel trio coherent states. We show that such states exhibit antibunching to all orders in the single-mode case. However, the two-mode higher-order antibunching may or may not exist depending on the parameters. We also show that in such states squeezing is fully absent in both single-mode and two-mode situations. As for the three-mode case, the so-called sum-squeezing is impossible but another kind of squeezing may arise for the orders K that are a multiple of three. The degree of the lowest allowable K = 3 order squeezing can reach a remarkable amount of 18 % . Of interest is the following property: when the order grows, the degree of antibunching increases but that of squeezing decreases.
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