Quantum dark solitons in ultracold one-dimensional Bose and Fermi gases

Andrzej Syrwid

doi:10.1088/1361-6455/abd37f

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arXiv · 2009.12554

Quantum dark solitons in ultracold one-dimensional Bose and Fermi gases

Andrzej Syrwid

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Abstract

Solitons are ubiquitous phenomena that appear, among others, in the description of tsunami waves, fiber-optic communication and ultracold atomic gases. The latter systems turned out to be an excellent playground for investigations of matter-wave solitons in a quantum world. This Tutorial provides a general overview of the ultracold contact interacting Bose and Fermi systems in a one-dimensional space that can be described by the renowned Lieb-Liniger and Yang-Gaudin models. Both the quantum many-body systems are exactly solvable by means of the Bethe ansatz technique, granting us a possibility for investigations of quantum nature of solitonic excitations. We discuss in details a specific class of quantum many-body excited eigenstates called yrast states and show that they are strictly related to quantum dark solitons in the both considered Bose and Fermi systems.

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Andrzej Syrwid. 2020-09-26. Quantum dark solitons in ultracold one-dimensional Bose and Fermi gases. https://doi.org/10.1088/1361-6455/abd37f

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