تقرير
Can one measure negative specific heat in the canonical statistical ensemble?
| العنوان: | Can one measure negative specific heat in the canonical statistical ensemble? |
|---|---|
| المؤلفون: | Staniscia, F., Turchi, A., Fanelli, D., Chavanis, P. H., De Ninno, G. |
| سنة النشر: | 2010 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Statistical Mechanics |
| الوصف: | According to thermodynamics, the specific heat of Boltzmannian short-range interacting systems is a positive quantity. Less intuitive properties are instead displayed by systems characterized by long-range interactions. In that case, the sign of specific heat depends on the considered statistical ensemble: negative specific heat can be found in isolated systems, which are studied in the framework of the microcanonical ensemble; on the other hand, it is generally recognized that a positive specific heat should always be measured in systems in contact with a thermal bath, for which the canonical ensemble is the appropriate one. We demonstrate that the latter assumption is not generally true: one can in principle measure negative specific heat also in the canonical ensemble if the system under scrutiny is non-Boltzmannian and/or out-of-equilibrium. Comment: 5 pages, 3 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1063/1.3569558 |
| URL الوصول: | http://arxiv.org/abs/1003.0631 |
| رقم الأكسشن: | edsarx.1003.0631 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1063/1.3569558 |
|---|