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Progress in physics

NEW ADVANCES IN ULTRACOLD FERMI GASES

Mingsheng Zhan

Published Jan 1, 2005• 0 citations
OpenAlex

Abstract

Over the last few years, there are exciting advances in experimental and theoretical studies of ultracold Fermi gases such as the successful realizations of molecular Bose-Einstein condensates and investigations of BCS-BEC crossover. We introduce in this paper these advances in ultracold Fermi gases, and give brief discussions for the development trends of ultracold Fermi gases.

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During the last few years the physics of ultracold atomic gases has experienced an extraordinary development, mostly due to the experimental realization of Bose-Einstein condensation (BEC). This development has being certainly interdisciplinary, bridging the gaps among very different areas, including atomic and molecular physics, quantum optics, condensed matter and solid-state physics, nonlinear physics, quantum information theory, etc.

Optics Express•Jan 1, 2004•1 citation

Molecular BEC and the crossover to a fermionic superfluid

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Ultracold Atomic Physics

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The field of ultracold atomic physics has developed rapidly during the last two decades, and currently encompasses a broad range of topics in physics, with a variety of important applications in topics ranging from quantum computing and simulation to quantum metrology, and can be used to probe fundamental many-body effects such as superconductivity and superfluidity. Beginning with the underlying and including the most cutting-edge experimental developments, this textbook covers essential topics such as Bose-Einstein condensation of alkali atoms, studies of BEC-BCS crossover in degenerate Fermi gas, synthetic gauge fields and Hubbard models, and many-body localization and dynamical gauge fields. Key physical concepts, such as symmetry and universality highlight the connections between different systems, and theory is developed with plain derivations supported by experimental results. This self-contained and modern text will be invaluable for researchers, graduate students and advanced undergraduates studying cold atom physics, from both a theoretical and experimental perspective.

Cambridge University Press eBooks•Jan 29, 2021•78 citations
Over the last few years, there are exciting advances in experimental and theoretical studies of ultracold Fermi gases such as the successful realizations of molecular Bose-Einstein condensates and investigations of BCS-BEC crossover. We introduce in this paper these advances in ultracold Fermi gases, and give brief discussions for the development trends of ultracold Fermi gases.
The paper gives an overview of the recent developments in the field of ultracold fermionic quantum gases. In particular, results obtained on an ultracold spin-mixture of /sup 6/Li atoms in a series of experiments performed in Innsbruck is presented . Bose-Einstein condensation of strongly bound atom pairs (molecules) , the reversible crossover to a degenerate Fermi gas, measurements of collective excitation modes, and spectroscopic observation of pairing in a strongly interacting Fermi gas of atoms are also discussed. The experimental results provide strong evidence for superfluidity.
Abstract This volume introduces the basic concepts of Bose–Einstein condensation and superfluidity. It makes special reference to the physics of ultracold atomic gases; an area in which enormous experimental and theoretical progress has been achieved in the last twenty years. Various theoretical approaches to describing the physics of interacting bosons and of interacting Fermi gases, giving rise to bosonic pairs and hence to condensation, are discussed in detail, both in uniform and harmonically trapped configurations. Special focus is given to the comparison between theory and experiment, concerning various equilibrium, dynamic, thermodynamic, and superfluid properties of these novel systems. The volume also includes discussions of ultracold gases in dimensions, quantum mixtures, and long-range dipolar interactions.
A series of major experimental breakthroughs have been obtained in the researches of ultracold quantum gases in the past years,which include the realization of Bose-Einstein condensation(BEC),the achievements of Fermi degeneracy and the observations of molecular BEC.This renewed the theoretical studies on the characteristics of BEC and degenerate Fermi gases,which have become a topic of great interest in the recent years.Based on the research works of our groups in the last years,the statistical properties of ultracold quantum gases are briefly described.The main contents include:the finite-size effects of quantum gases,roles of external potential,influence of interatomic interaction,low temperature behaviors of q-deformed quantum gas and the nonextensive statistics.The results obtained may be helpful to the further understanding of the low temperature behaviors of quantum gases as well as the underlying nature of various macroscopic quantum effects.
The field of ultracold atomic physics has developed rapidly during the last two decades, and currently encompasses a broad range of topics in physics, with a variety of important applications in topics ranging from quantum computing and simulation to quantum metrology, and can be used to probe fundamental many-body effects such as superconductivity and superfluidity. Beginning with the underlying and including the most cutting-edge experimental developments, this textbook covers essential topics such as Bose-Einstein condensation of alkali atoms, studies of BEC-BCS crossover in degenerate Fermi gas, synthetic gauge fields and Hubbard models, and many-body localization and dynamical gauge fields. Key physical concepts, such as symmetry and universality highlight the connections between different systems, and theory is developed with plain derivations supported by experimental results. This self-contained and modern text will be invaluable for researchers, graduate students and advanced undergraduates studying cold atom physics, from both a theoretical and experimental perspective.