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Academic literature on the topic 'Fermi quantum gas'

Author: Grafiati
Published: 10 March 2023

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Journal articles on the topic "Fermi quantum gas"

1

De Marco, Luigi, Giacomo Valtolina, Kyle Matsuda, William G. Tobias, Jacob P. Covey, and Jun Ye. "A degenerate Fermi gas of polar molecules." Science 363, no. 6429 (2019): 853–56. http://dx.doi.org/10.1126/science.aau7230.

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Experimental realization of a quantum degenerate gas of molecules would provide access to a wide range of phenomena in molecular and quantum sciences. However, the very complexity that makes ultracold molecules so enticing has made reaching degeneracy an outstanding experimental challenge over the past decade. We now report the production of a degenerate Fermi gas of ultracold polar molecules of potassium-rubidium. Through coherent adiabatic association in a deeply degenerate mixture of a rubidium Bose-Einstein condensate and a potassium Fermi gas, we produce molecules at temperatures below 0.3 times the Fermi temperature. We explore the properties of this reactive gas and demonstrate how degeneracy suppresses chemical reactions, making a long-lived degenerate gas of polar molecules a reality.
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2

Erk а b о ev, U. I., R. G. R а khim о v, N. А. S а yid о v, J. I. Mirz а ev та U. B. Negmatov. "INFLUENCE О F А STR О NG M А GNETIC FIELD О N FERMI ENERGY О SCILL А TI О NS IN TW О -DIMENSI О N А L SEMIC О NDUCT О R M А TERI А LS". SEMOCONDUCTOR PHYSICS AND MICROELECTRONICS 3, № 4 (2021): 30–37. http://dx.doi.org/10.37681/2181-1652-019-x-2021-4-5.

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This article shows that the Fermi levels of a nanoscale semiconductor in a quantizing magnetic field are quantized. A method is proposed for calculating the Fermi energy oscillations for a two-dimensional electron gas at different magnetic fields and temperatures. An analytical expression is obtained for calculating the Fermi-Dira c distribution function at high temperatures and weak magnetic fields. With the help of the propos ed formula, the experimental results in nanoscale semiconductor structures are investigated. Using fo rmula, Fermi energy oscillations are explained for two-dimensional electron gases in quantum wells (quantum wells, mainly GaAs/GaAlAs heterostructures) with a parabolic dispersion law. Keywоrds:quаntizing mа gnetic field, temperаture, Fermi energy, n аnоscаle semicоnductоrs,twо-dimensiоnаl structures, dispersiоn.
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3

Dil, Emre. "Can quantum black holes be (q, p)-fermions?" International Journal of Modern Physics A 32, no. 15 (2017): 1750080. http://dx.doi.org/10.1142/s0217751x17500804.

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In this study, to investigate the very nature of quantum black holes, we try to relate three independent studies: (q, p)-deformed Fermi gas model, Verlinde’s entropic gravity proposal and Strominger’s quantum black holes obeying the deformed statistics. After summarizing Strominger’s extremal quantum black holes, we represent the thermostatistics of (q, p)-fermions to reach the deformed entropy of the (q, p)-deformed Fermi gas model. Since Strominger’s proposal claims that the quantum black holes obey deformed statistics, this motivates us to describe the statistics of quantum black holes with the (q, p)-deformed fermions. We then apply the Verlinde’s entropic gravity proposal to the entropy of the (q, p)-deformed Fermi gas model which gives the two-parameter deformed Einstein equations describing the gravitational field equations of the extremal quantum black holes obeying the deformed statistics. We finally relate the obtained results with the recent study on other modification of Einstein equations obtained from entropic quantum corrections in the literature.
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4

GRADO-CAFFARO, M. A., and M. GRADO-CAFFARO. "CHEMICAL POTENTIAL CALCULATION RELATIVE TO AN EXCITONIC GAS IN A NON-PARABOLIC QUANTUM DOT." Modern Physics Letters B 20, no. 26 (2006): 1703–6. http://dx.doi.org/10.1142/s0217984906012183.

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The Fermi energy level, that is, the chemical potential associated with an excitonic gas in a semiconductor within a non-parabolic quantum dot is calculated by determining previously the corresponding Fermi velocity of excitons conceived as confined in a spherical quantum box on the basis of the energy levels of the hydrogen atom. From the Fermi energy calculation, the reduced effective mass of an electron–hole pair is found to be dependent upon the spatial exciton density. In addition, some aspects related to quantization of the Fermi energy in question and temperature dependence are discussed.
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5

Guan, Xiwen. "Critical phenomena in one dimension from a Bethe ansatz perspective." International Journal of Modern Physics B 28, no. 24 (2014): 1430015. http://dx.doi.org/10.1142/s0217979214300151.

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This article briefly reviews recent theoretical developments in quantum critical phenomena in one-dimensional (1D) integrable quantum gases of cold atoms. We present a discussion on quantum phase transitions, universal thermodynamics, scaling functions and correlations for a few prototypical exactly solved models, such as the Lieb–Liniger Bose gas, the spin-1 Bose gas with antiferromagnetic spin-spin interaction, the two-component interacting Fermi gas as well as spin-3/2 Fermi gases. We demonstrate that their corresponding Bethe ansatz solutions provide a precise way to understand quantum many-body physics, such as quantum criticality, Luttinger liquids (LLs), the Wilson ratio, Tan's Contact, etc. These theoretical developments give rise to a physical perspective using integrability for uncovering experimentally testable phenomena in systems of interacting bosonic and fermonic ultracold atoms confined to 1D.
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6

Das, Samir, and Shyamal Biswas. "Particle scattering by rotating trapped quantum gases at finite temperature." Physica Scripta 96, no. 12 (2021): 125037. http://dx.doi.org/10.1088/1402-4896/ac3d4e.

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Abstract We have analytically explored the quantum phenomena of particle scattering by rotating trapped quantum gases of electrically neutral bosons and fermions for the short-ranged Fermi-Huang interactions between the incident particle and the scatterers. We have predicted differential scattering cross-sections and their temperature and angular velocity dependencies in this regard, in particular, for an ideal Bose gas in a rotating harmonic trap, an ideal Fermi gas in a rotating harmonic trap, and a weakly interacting Bose gas in a slow rotating harmonic trap. We have theoretically probed the lattice-pattern of the vortices in a rapidly rotating strongly interacting Bose–Einstein condensate by the particle scattering method. We also have obtained de Haas-van Alphen-like oscillations in the differential scattering cross-section for an ideal ultracold Fermi gas in a rotating harmonic trap. Our predictions on the differential scattering cross-sections can be tested within the present-day experimental setups.
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7

Huang, Xun, Xu-Yang Hou, Yan Gong, and Hao Guo. "Finite temperature behaviors of q-deformed Fermi gases." Modern Physics Letters B 33, no. 24 (2019): 1950294. http://dx.doi.org/10.1142/s0217984919502944.

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During the last three decades, nonstandard statistics for indistinguishable quantum particles has attracted wide attention and research interests from many institutions. Among these new types of statistics, the [Formula: see text]-deformed Bose and Fermi statistics, originated from the study of quantum algebra, are being applied in more and more physical systems. In this paper, we construct a [Formula: see text]-deformed generalization of the BCS-Leggett theory for ultracold Fermi gases based on our previously constructed [Formula: see text]-deformed BCS theory. Some interesting features of this [Formula: see text]-deformed interacting quantum gas are obtained by numerical analysis. For example, in the ordinary Bose–Einstein Condensation regime, the gas presents a fermionic feature instead of bosonic feature if the deformation parameter is tuned suitably, which might be referred to as the [Formula: see text]-induced “Bose–Fermi” crossover. Conversely, a weak sign of the “Fermi–Bose” crossover is also found in the ordinary weak fermionic regime.
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8

Kokkelmans, S., M. Holland, R. Walser, and M. Chiofalo. "Resonance Superfluidity in a Quantum Degenerate Fermi Gas." Acta Physica Polonica A 101, no. 3 (2002): 387–97. http://dx.doi.org/10.12693/aphyspola.101.387.

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9

Cao, C., E. Elliott, J. Joseph, et al. "Universal Quantum Viscosity in a Unitary Fermi Gas." Science 331, no. 6013 (2010): 58–61. http://dx.doi.org/10.1126/science.1195219.

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10

Tohyama, Mitsuru. "Quantum Study of a Trapped Dipolar Fermi Gas." Journal of the Physical Society of Japan 78, no. 10 (2009): 104003. http://dx.doi.org/10.1143/jpsj.78.104003.

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