SURFACE EXCITATIONS OF A NONIDEAL BOSE-GAS

被引：1
|
作者：
PIKHITSA, PV
机构：
[1] Department of Theor. Physics, Odessa University, Odessa, 270057
来源：
PHYSICA B | 1992年 / 179卷 / 03期
关键词：
D O I：
10.1016/0921-4526(92)90017-M
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Surface excitations of a nonideal Bose gas are investigated within the Gross-Pitaevskii equation linearized near the kink solution. The resulting matrix Schrodinger equation with supersymmetric potentials describes two Goldstone (gapless) modes which are localized by these potentials near the free surface. The first mode represents an ordinary capillary wave (ripplon) and the second one corresponds to a surface weakly trapped phonon. The last one might additionally contribute to the surface tension of helium 11 explaining the discrepancy between experiment and theory.
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页码：201 / 207
页数：7
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