Report
Superglass phase of interaction-blockaded gases on a triangular lattice
| العنوان: | Superglass phase of interaction-blockaded gases on a triangular lattice |
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| المؤلفون: | Angelone, Adriano, Mezzacapo, Fabio, Pupillo, Guido |
| المصدر: | Phys. Rev. Lett. 116, 135303 (2016) |
| سنة النشر: | 2015 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Quantum Gases |
| الوصف: | We investigate the quantum phases of monodispersed bosonic gases confined to a triangular lattice and interacting via a class of soft-shoulder potentials. The latter correspond to soft-core potentials with an additional hard-core onsite interaction. Using exact quantum Monte Carlo simulations, we show that the low temperature phases for weak and strong interactions following a temperature quench are a homogeneous superfluid and a glass, respectively. The latter is an insulating phase characterized by inhomogeneity in the density distribution and structural disorder. Remarkably, we find that for intermediate interaction strengths a {\it superglass} occurs in an extended region of the phase diagram, where glassy behavior coexists with a sizable finite superfluid fraction. This glass phase is obtained in the absence of geometrical frustration or external disorder and is a result of the competition of quantum fluctuations and cluster formation in the corresponding classical ground state. For high enough temperature, the glass and superglass turn into a floating stripe solid and a supersolid, respectively. Given the simplicity and generality of the model, these phases should be directly relevant for state-of-the-art experiments with Rydberg-dressed atoms in optical lattices. Comment: 5.5+3.5 pages, 4+4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.116.135303 |
| URL الوصول: | http://arxiv.org/abs/1504.00346 |
| رقم الانضمام: | edsarx.1504.00346 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.116.135303 |
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