دراسة الاستجابة العرضية لسائل كوانتي تحت تأثير كمون شعاعي خارجي
Abstract
تم في هذا البحث حساب المركبة العرضية للتشوهات الطاقية في الصيغ الموجية المرونية لسائل كوانتي وذلك في إطار نظرية لانداو في سائل فيرمي، آخذين بعين الاعتبار تأثير المركبة العرضية للاضطراب الخارجي المطبق على الجملة، حيث تم حساب كثافة التيار المرتبطة بهذه المركبة إضافةً إلى حساب تنسور الضغط في هذه الحالة. أثناء دراستنا تماعتبار درجة الحرارة منخفضة بشكل كبير بحيث تتحقق من أجلها المتراجحة حيث تمثل درجة حرارة فيرمي (Fermi Temperature). تم مقارنة استجابة السائل للمركبة العرضية للكمون الخارجي المطبق، مع استجابته للمركبة الطولية لهذا الاضطراب عند نفس الشروط، من خلال دراسة تابعية أنماط القص العرضية والطولية (التي تعبر عن هاتين الاستجابتين) لتردد ومتجهة الموجة للاضطراب المطبق. تبين لنا أن هاتين الاستجابتين مختلفتان في الحالة العامة ولكنهما تصبحان متساويتين في الحالة الخاصة ،حيث تمثل السرعة على سطح فيرمي.والتي من أجلها تصبح فرضيات النموذج اللزوجي صحيحة. In this search, we have calculated thetransverse component of energy distortion in elasticity wave modes of quantum liquid, by using Landau's theory in Fermi liquid taken in consideration the effect of transverse component of an external disturbance on the liquid. We calculated the current density related to this component, and the stress tensor component according with this state.In our search we have been considered the temperature is low enough since the relation is true, where is the Fermi temperature. We have compared the response of the liquid, for transverse componentof the external disturbance, with its response for longitudinal one in same conditions, by studding the transverse and longitudinal shear modulus (which equivalent these responses) as functions of the frequency and wave vector of the external disturbance. We have found in general that these responses are different, but they become equal in particular case , where the velocity on Fermi surface, and in this case the viscoelastic model hypotheses become true.Downloads
Published
How to Cite
Issue
Section
License
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
The authors retain the copyright and grant the right to publish in the magazine for the first time with the transfer of the commercial right to the Tishreen University Journal -Basic Sciences Series
Under a CC BY- NC-SA 04 license that allows others to share the work with of the work's authorship and initial publication in this journal. Authors can use a copy of their articles in their scientific activity, and on their scientific websites, provided that the place of publication is indicted in Tishreen University Journal -Basic Sciences Series . The Readers have the right to send, print and subscribe to the initial version of the article, and the title of Tishreen University Journal -Basic Sciences Series Publisher
journal uses a CC BY-NC-SA license which mean
You are free to:
- Share — copy and redistribute the material in any medium or format
- Adapt — remix, transform, and build upon the material
- The licensor cannot revoke these freedoms as long as you follow the license terms.
- Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- NonCommercial — You may not use the material for commercial purposes.
- ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
- No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.