期刊
SYMMETRY-BASEL
卷 13, 期 10, 页码 -出版社
MDPI
DOI: 10.3390/sym13101865
关键词
quantum turbulence; Bose-Einstein condensate; out-of-equilibrium
资金
- Sao Paulo Research Foundation (FAPESP) [2013/07276-1, 2014/50857-8, 2018/09191-7]
- National Council for Scientific and Technological Development (CNPq) [465360/2014-9]
- CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico, National Council for Scientific and Technological Development) [305586/2017-3]
Quantum turbulence is characterized by disorder in both space and time, with interactions between many degrees of freedom. This study explores the decaying regime of quantum turbulence in a trapped Bose-Einstein condensate using a characteristic length scale and reconstructing momentum distributions. The characteristic length allows for an intuitive visualization of the time evolution of the turbulent state.
Quantum turbulence is characterized by many degrees of freedom interacting non-linearly to produce disordered states, both in space and in time. In this work, we investigate the decaying regime of quantum turbulence in a trapped Bose-Einstein condensate. We present an alternative way of exploring this phenomenon by defining and computing a characteristic length scale, which possesses relevant characteristics to study the establishment of the quantum turbulent regime. We reconstruct the three-dimensional momentum distributions with the inverse Abel transform, as we have done successfully in other works. We present our analysis with both the two- and three-dimensional momentum distributions, discussing their similarities and differences. We argue that the characteristic length allows us to intuitively visualize the time evolution of the turbulent state.
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