Report
Matching universal behavior with potential models
| العنوان: | Matching universal behavior with potential models |
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| المؤلفون: | Álvarez-Rodríguez, R., Gattobigio, A. Deltuva. M., Kievsky, A. |
| المصدر: | Phys. Rev. A 93, 062701 (2016) |
| سنة النشر: | 2016 |
| المجموعة: | Condensed Matter Nuclear Theory |
| مصطلحات موضوعية: | Condensed Matter - Quantum Gases, Nuclear Theory |
| الوصف: | Two-, three-, and four-boson systems are studied close to the unitary limit using potential models constructed to reproduce the minimal information given by the two-body scattering length $a$ and the two-body binding energy or virtual state energy $E_2$. The particular path used to reach the unitary limit is given by varying the potential strength. In this way the energy spectrum in the three- and four-boson systems is computed. The lowest energy states show finite-range effects absorbed in the construction of level functions that can be used to study real systems. Higher energy levels are free from finite-range effects, therefore the corresponding level functions tend to the zero-range universal function. Using this property a zero-range equation for the four-boson system is proposed and the four-boson universal function is computed. Comment: 8 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevA.93.062701 |
| URL الوصول: | http://arxiv.org/abs/1603.05878 |
| رقم الانضمام: | edsarx.1603.05878 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevA.93.062701 |
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