Article
Physics, Multidisciplinary
Jia-Ying Yang, Xu Liu, Ji-Hong Qin, Huai-Ming Guo
Summary: According to the mean-field theory, the thermodynamic properties of a two-dimensional charged spin-1/2 Fermi gas are investigated. The system experiences a competition between diamagnetism and paramagnetism, and the Lande factor determines the strength of the paramagnetic effect. The entropy and specific heat are affected by the Lande factor, with a smaller factor resulting in smaller values. A critical value of the Lande factor is found for the transition point due to the competition. The entropy increases with the magnetic field when the Lande factor is less than 0.58, while it first decreases, reaches a minimum, and then increases again with the growth of paramagnetism when the Lande factor is greater than 0.58. Both the entropy and specific heat increase with temperature, and no phase transition occurs.
Article
Physics, Multidisciplinary
Jia Wang, Xia-Ji Liu, Hui Hu
Summary: In this study, we investigate a heavy impurity immersed in an interacting Fermi superfluid using the exact functional determinant approach. We analyze the impact of the pairing gap on the properties of quasiparticles revealed by two spectroscopies. The results show interesting phenomena, such as dark continuum, molecule-hole continuum, and repulsive polaron, depending on the scattering conditions.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
Kazuya Nishimura, Eiji Nakano, Kei Iida, Hiroyuki Tajima, Takahiko Miyakawa, Hiroyuki Yabu
Summary: This study investigates the properties of Fermi polarons formed by impurity atoms in ultracold atomic Fermi gases, showing that these properties exhibit spatial anisotropies reflecting the momentum anisotropy of the background dipolar Fermi gas. The effective mass and momentum drag parameter of the polaron both tend to decrease by approximately 10% as the DDI strength increases up to its critical value, while the longitudinal properties show weak dependence on the DDI.
Article
Physics, Multidisciplinary
M. A. Ramirez-Moreno, G. Ares de Parga, F. Angulo-Brown
Summary: This study applies the thermodynamic restrictions imposed by the Carnot theorem on an Otto cycle operating at maximum work regime to determine the heat capacities of electron gases from different metals. The coefficients alpha and beta, obtained from a free electron gas model, are used to calculate these values. The experimental data confirms that only metals with high electronegativities provide a fermion gas that meets the thermodynamic restrictions.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2022)
Article
Physics, Multidisciplinary
Xue-Jing Feng, Jin-Xin Li, Lu Qin, Ying-Ying Zhang, ShiQiang Xia, Lu Zhou, ChunJie Yang, ZunLue Zhu, Wu-Ming Liu, Xing-Dong Zhao
Summary: We investigate the influence of the anisotropic spin-orbit coupling (SOC) on the itinerant ferromagnetism in a dipolar Fermi atomic system. Our study reveals that both the anisotropy and magnitude of SOC play important roles in the ferromagnetism transition boundaries and the properties of the ground states. We propose a helpful scheme and quantum control method to overcome the difficulties in experimental observation, and further explore the existence of exotic Fermi surfaces and abnormal phase region by controlling the anisotropy of SOC.
FRONTIERS OF PHYSICS
(2023)
Article
Physics, Fluids & Plasmas
Alexey S. Kozharin, Pavel R. Levashov
Summary: Analytical formulae for the derivatives of Helmholtz free energy of non-relativistic ideal Fermi gas are provided, demonstrating important thermodynamic quantities. Correct ideal Boltzmann gas and low-temperature Fermi gas asymptotes were shown, with corrections to thermodynamic functions derived for these limiting cases. The developed Python module ifg allows for accurate numerical computations of thermodynamic properties of ideal Fermi gas.
CONTRIBUTIONS TO PLASMA PHYSICS
(2021)
Article
Multidisciplinary Sciences
Andrea Barresi, Antoine Boulet, Gabriel Wlazlowski, Piotr Magierski
Summary: We investigate the life cycle of the large amplitude Higgs mode in strongly interacting superfluid Fermi gas. Through numerical simulations and the technique of the interaction quench, we verify the previous theoretical predictions on the mode's frequency. We also demonstrate the mode's dynamic instability against external perturbation and examine the post-decay state characterized by spatial fluctuations at scales comparable to the superfluid coherence length, showing similarities with FFLO states in higher dimensionalities and nonzero spin imbalances.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Inorganic & Nuclear
J. Molina Coronell, C. Solano Mazo, O. Martinez Castro
Summary: The structural, electronic, elastic, and thermal properties of Y2Fe17 compound in rhombohedral and hexagonal phases were investigated using Density Functional Theory (DFT). Results showed slight differences in lattice parameters between the two structures. The electronic properties exhibited typical metallic behavior, and magnetism was observed in both phases of Y2Fe17.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Physics, Multidisciplinary
Xin Wang, Xiang Li, Ilya Arakelyan, J. E. Thomas
Summary: In this study, we measure the free decay of a spatially periodic density profile in a strongly interacting Fermi gas with a high temperature. The results provide direct measurements of the thermal conductivity and the shear viscosity, obtained from the time-dependent evolution.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Sreemayee Aditya, Diptiman Sen
Summary: In this study of a one-dimensional lattice model, various phenomena such as fermion interactions and Tomonaga-Luttinger liquids were observed, with a focus on understanding the influence of parameters phi and eta on the system properties.
Article
Physics, Multidisciplinary
Bei Xu, Zhongze Guo, Qiang Gu
Summary: The diagram technique is used to study the ground state properties of a generalized spin-3/2 Fermi gas, which shows that the spin-mixing term always strengthens the ground state energy and effective mass.
Article
Engineering, Environmental
Jae Hak Jeong, Minjun Cha, Jiyeong Jang, Sol Geo Lim, Chang Yeop Oh, Jong-Won Lee, Jeasung Park, Ji-Ho Yoon
Summary: The thermodynamic stability and spectroscopic properties of CO-C3H8 mixed gas hydrates were investigated for potential applications in hydrate-based gas separation (HBGS). The preferential occupation behavior of CO and C3H8 molecules in the hydrate cages was demonstrated, and predictions using thermodynamic models were in excellent agreement with experimental results. The HBGS process was found to be effective for selectively separating CO and C3H8 from gas mixtures.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Optics
A. Ciamei, S. Finelli, A. Cosco, M. Inguscio, A. Trenkwalder, M. Zaccanti
Summary: We report on the realization of a degenerate mixture of ultracold fermionic lithium and chromium atoms, and demonstrate the control of density and degeneracy of the components, as well as the lithium-to-chromium density ratio.
Article
Engineering, Marine
Dalibor Perusko, Damir Karabaic, Ivan Bajsic, Joze Kutin
Summary: This study investigates the influence of LNG ageing on the thermodynamic properties of boil-off gas (BOG) during LNG storage and transportation by ship. The research results provide insight into the inaccuracy of BOG flow measurements and suggest correction methods, which are crucial for LNG shipping economics and the utilization of BOG as a fuel for ship propulsion.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Optics
Albert Gallemi, Luis Santos
Summary: Recent experiments have created supersolids, including two-dimensional arrays of quantum droplets. Other density patterns, such as honeycomb supersolids, may occur in trapped condensates at higher densities. While honeycomb supersolids have a higher superfluid fraction compared to droplet supersolids, they cannot create quantized vortices.