Fragmentation of phase-fluctuating condensates
Year: 2017
Type: preprint
Abstract: We study zero-temperature quantum phase fluctuations in harmonically trapped one-dimensional interacting Bose gases, using the self-consistent multiconfigurational time-dependent Hartree method. In a regime of mesoscopic particle numbers and moderate contact couplings, it is shown that the phase-fluctuating condensate is properly described as a fragmented condensate. In addition, we demonstrate that the spatial dependence of the amplitude of phase fluctuations significantly deviates from what is obtained in Bogoliubov theory. Our results can be verified in currently available experiments. They therefore provide an opportunity both to experimentally benchmark the multiconfigurational time-dependent Hartree method, as well as to directly observe, for the first time, the quantum many-body phenomenon of fragmentation in single traps.
Source: arXiv (Cornell University)
Authors: Oleksandr V. Marchukov, Uwe R. Fischer
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2764098522