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EnglishFor flowing quantum gases, it has been found that at long times an initial black-hole laser (BHL) configuration exhibits only two possible states: the ground state or a periodic self-oscillating state of continuous emission of solitons. So far, all the works on this subject are based on a highly idealized model, quite difficult to implement experimentally. Here we study the instability spectrum and the time evolution of a recently proposed realistic model of a BHL, thus providing a useful theoretical tool for the clear identification of black-hole lasing in future experiments. We further confirm the existence of a well-defined phase diagram at long times, which bespeaks universality in the long-time behavior of a BHL. Additionally, we develop a complementary model in which the same potential profile is applied to a subsonic homogeneous flowing condensate that, despite not forming a BHL, evolves toward the same phase diagram as the associated BHL model. This result reveals an even stronger form of robustness in the long-time behavior with respect to the transient, which goes beyond what has been described in the previous literature.
Long time universality of black-hole lasers / de Nova, Jrm; Palacios, Pf; Carusotto, I; Sols, F. - In: NEW JOURNAL OF PHYSICS. - ISSN 1367-2630. - 23:2(2021). [10.1088/1367-2630/abdce2]
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| Titolo: | Long time universality of black-hole lasers | |
| Autori: | de Nova, Jrm; Palacios, Pf; Carusotto, I; Sols, F | |
| Autori Unitn: | ||
| Titolo del periodico: | NEW JOURNAL OF PHYSICS | |
| Anno di pubblicazione: | 2021 | |
| Numero e parte del fascicolo: | 2 | |
| Codice identificativo WOS: | WOS:000626875200001 | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1088/1367-2630/abdce2 | |
| Handle: | http://hdl.handle.net/11572/343920 | |
| Citazione: | Long time universality of black-hole lasers / de Nova, Jrm; Palacios, Pf; Carusotto, I; Sols, F. - In: NEW JOURNAL OF PHYSICS. - ISSN 1367-2630. - 23:2(2021). [10.1088/1367-2630/abdce2] | |
| Appare nelle tipologie: | 03.1 Articolo su rivista (Journal article) |
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