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

• URL: http://arxiv.org/abs/2009.12554v3
• Date: Mon, 24 May 2021 11:49:48 GMT
• Title: Quantum dark solitons in ultracold one-dimensional Bose and Fermi gases
• Authors: Andrzej Syrwid
• Abstract summary: Solitons are ubiquitous phenomena that appear, among others, in the description of tsunami waves. This tutorial provides a general overview of the ultracold contact interacting Bose and Fermi systems.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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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