تقرير
Quantum Bubbles in Microgravity
| العنوان: | Quantum Bubbles in Microgravity |
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| المؤلفون: | Tononi, A., Cinti, F., Salasnich, L. |
| المصدر: | Phys. Rev. Lett. 125, 010402 (2020) |
| سنة النشر: | 2019 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Quantum Gases |
| الوصف: | The recent developments of microgravity experiments with ultracold atoms have produced a relevant boost in the study of shell-shaped ellipsoidal Bose-Einstein condensates. For realistic bubble-trap parameters, here we calculate the critical temperature of Bose-Einstein condensation, which, if compared to the one of the bare harmonic trap with the same frequencies, shows a strong reduction. We simulate the zero-temperature density distribution with the Gross-Pitaevskii equation, and we study the free expansion of the hollow condensate. While part of the atoms expands in the outward direction, the condensate self-interferes inside the bubble trap, filling the hole in experimentally observable times. For a mesoscopic number of particles in a strongly interacting regime, for which more refined approaches are needed, we employ quantum Monte Carlo simulations, proving that the nontrivial topology of a thin shell allows superfluidity. Our work constitutes a reliable benchmark for the forthcoming scientific investigations with bubble traps. Comment: 7 pages, 7 figures; published version |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.125.010402 |
| URL الوصول: | http://arxiv.org/abs/1912.07297 |
| رقم الأكسشن: | edsarx.1912.07297 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.125.010402 |
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