Academic literature on the topic 'Quantum-Degenerate mixtures'
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Journal articles on the topic "Quantum-Degenerate mixtures":
Modugno, G., G. Roati, and M. Inguscio. "Quantum degenerate potassium-rubidium mixtures." Fortschritte der Physik 51, no. 45 (May 7, 2003): 396–401. http://dx.doi.org/10.1002/prop.200310053.
Wang Peng-Jun, Chen Hai-Xia, Xiong De-Zhi, Yu Xu-Dong, Gao Feng, and Zhang Jing. "The design of quadrapole-Ioffe configuration trap for quantum degenerate Fermi-Bose mixtures." Acta Physica Sinica 57, no. 8 (2008): 4840. http://dx.doi.org/10.7498/aps.57.4840.
Belmonte-Beitia, Juan, Víctor M. Pérez-García, and Vadym Vekslerchik. "Modulational instability, solitons and periodic waves in a model of quantum degenerate boson–fermion mixtures." Chaos, Solitons & Fractals 32, no. 4 (May 2007): 1268–77. http://dx.doi.org/10.1016/j.chaos.2005.12.043.
Alba-Arroyo, J. E., S. F. Caballero-Benitez, and R. Jáuregui. "Rotational Dynamics Induced by Low-Energy Binary Collisions of Quantum Droplets." Photonics 10, no. 7 (July 14, 2023): 823. http://dx.doi.org/10.3390/photonics10070823.
De-Zhi, Xiong, Chen Hai-Xia, Wang Peng-Jun, Yu Xu-Dong, Gao Feng, and Zhang Jing. "Quantum Degenerate Fermi–Bose Mixtures of 40 K and 87 Rb Atoms in a Quadrupole-Ioffe Configuration Trap." Chinese Physics Letters 25, no. 3 (March 2008): 843–46. http://dx.doi.org/10.1088/0256-307x/25/3/011.
Buscemi, Francesco, Kodai Kobayashi, and Shintaro Minagawa. "A complete and operational resource theory of measurement sharpness." Quantum 8 (January 25, 2024): 1235. http://dx.doi.org/10.22331/q-2024-01-25-1235.
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 (January 17, 2019): 853–56. http://dx.doi.org/10.1126/science.aau7230.
Wu, Yu-Ping, Xing-Can Yao, Hao-Ze Chen, Xiang-Pei Liu, Xiao-Qiong Wang, Yu-Ao Chen, and Jian-Wei Pan. "A quantum degenerate Bose–Fermi mixture of41K and6Li." Journal of Physics B: Atomic, Molecular and Optical Physics 50, no. 9 (April 6, 2017): 094001. http://dx.doi.org/10.1088/1361-6455/aa658b.
Fukuhara, T., T. Tsujimoto, and Y. Takahashi. "Quadrupole oscillations in a quantum degenerate Bose–Fermi mixture." Applied Physics B 96, no. 2-3 (February 13, 2009): 271–74. http://dx.doi.org/10.1007/s00340-009-3375-5.
Ferlaino, F., R. J. Brecha, P. Hannaford, F. Riboli, G. Roati, G. Modugno, and M. Inguscio. "Dipolar oscillations in a quantum degenerate Fermi Bose atomic mixture." Journal of Optics B: Quantum and Semiclassical Optics 5, no. 2 (April 1, 2003): S3—S8. http://dx.doi.org/10.1088/1464-4266/5/2/351.
Dissertations / Theses on the topic "Quantum-Degenerate mixtures":
Ridinger, Armin. "Towards quantum degenerate Fermi mixtures : photoassociation of weakly bound 6Li40K molecules." Phd thesis, Ecole Normale Supérieure de Paris - ENS Paris, 2011. http://tel.archives-ouvertes.fr/tel-00613211.
Hara, Hideaki. "Production of Quantum Degenerate Mixtures of Alkali and Alkaline-Earth-Like Atoms." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/185217.
Santiago, González Ibon. "LiNaK : multi-species apparatus for the study of ultracold quantum degenerate mixtures." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/77478.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (p. 109-113).
This thesis describes the construction of a versatile apparatus to study ultracold quantum mixtures capable of simultaneously cooling fermionic ⁶Li and ⁴⁰K, as well as the bosonic ⁴¹K. The main features of the experimental setup are presented, in particular the addition of a new species ²³Na, which has enabled the study of the Bose-Fermi mixture ²³Na-⁴⁰K. Three main experimental benchmarks are outlined: first, the production of a Bose-Einstein Condensate of ⁴¹K is discussed and an evaluation of its properties as a coolant are analysed. Secondly, the creation of a triply degenerate Bose-Fermi-Fermi gas of ⁴¹K-⁴⁰K-⁶Li is presented. Simultaneous observation of Pauli Pressure and Bose Condensation in the triply degenerate gas is reported. In addition, interspecies Feshbach resonances between ⁴¹K-⁴⁰K and ⁶Li-⁴¹K are observed, opening the way to the study of a strongly interacting isotopic Bose-Fermi mixture of ⁴¹K-⁴⁰K, which have similar mass. Thirdly, the creation of a quantum degenerate Bose-Fermi mixture of ²³Na-⁴⁰K is discussed and over thirty Feshbach resonances are identified. Finally, a degenerate ²³Na-⁴⁰K Bose-Fermi mixture opens the way to creating fermionic NaK ground state molecules, which are known to be chemically stable and have a larger permanent electric dipole than KRb. This thesis concludes with a review of the molecular properties of NaK and explores the possibilities of bringing Feshbach molecules of NaK into the singlet rovibrational ground state.
by Ibon Santiago González.
S.M.
Albus, Alexander. "Mixtures of Bosonic and Fermionic atoms." Phd thesis, Universität Potsdam, 2003. http://opus.kobv.de/ubp/volltexte/2005/98/.
Zuerst wurde der Formalismus der Quantenfeldtheorie auf homogene, atomare Boson-Fermion Gemische erweitert, um grundlegende Größen wie Quasiteilchenspektren, die Grundzustandsenergie und daraus abgeleitete Größen über die Molekularfeldtheorie hinaus zu berechnen.
Unter Zuhilfenahme der dieser Resultate System wurde ein Boson-Fermion Gemisch in einem Fallenpotential im Rahmen der Dichtefunktionaltheorie beschrieben. Daraus konnten die Dichteprofile ermittelt werden und es ließen sich drei Bereiche im Phasendiagramm identifizieren:
(i) ein Bereich eines stabilen Gemisches,
(ii) ein Bereich, in dem die Spezies entmischt sind und
(iii) ein Bereich, in dem das System kollabiert.
Im letzten dieser drei Fällen waren Austausch--Korrelationseffekte signifikant. Weiterhin wurde die Änderung der kritischen Temperatur der Bose-Einstein-Kondensation aufgrund der Boson-Fermion-Wechselwirkung berechnet. Verursacht wird dieser Effekt von Dichtumverteilungen aufgrund der Wechselwirkung.
Dann wurden Boson-Fermion Gemische in optischen Gittern betrachtet. Ein Stabilitätskriterium gegen Phasenentmischung wurde gefunden und es ließen sich Bedingungen für einen supraflüssig zu Mott-isolations Phasenübergang angeben. Diese wurden sowohl mittels einer Molekularfeldrechnung als auch numerisch im Rahmen eines Gutzwilleransatzes gefunden. Es wurden weiterhin neuartige frustrierte Grundzustände im Fall von sehr großen Gitterstärken gefunden.
The theory of atomic Boson-Fermion mixtures in the dilute limit beyond mean-field is considered in this thesis.
Extending the formalism of quantum field theory we derived expressions for the quasi-particle excitation spectra, the ground state energy, and related quantities for a homogenous system to first order in the dilute gas parameter.
In the framework of density functional theory we could carry over the previous results to inhomogeneous systems. We then determined to density distributions for various parameter values and identified three different phase regions:
(i) a stable mixed regime,
(ii) a phase separated regime, and
(iii) a collapsed regime.
We found a significant contribution of exchange-correlation effects in the latter case. Next, we determined the shift of the Bose-Einstein condensation temperature caused by Boson-Fermion interactions in a harmonic trap due to redistribution of the density profiles.
We then considered Boson-Fermion mixtures in optical lattices. We calculated the criterion for stability against phase separation, identified the Mott-insulating and superfluid regimes both, analytically within a mean-field calculation, and numerically by virtue of a Gutzwiller Ansatz. We also found new frustrated ground states in the limit of very strong lattices.
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Anmerkung:
Der Autor ist Träger des durch die Physikalische Gesellschaft zu Berlin vergebenen Carl-Ramsauer-Preises 2004 für die jeweils beste Dissertation der vier Universitäten Freie Universität Berlin, Humboldt-Universität zu Berlin, Technische Universität Berlin und Universität Potsdam.
Posso, Trujillo Katerine [Verfasser]. "Theoretical study of the preparation of quantum degenerate mixtures for precision atom interferometry / Katerine Posso Trujillo." Hannover : Gottfried Wilhelm Leibniz Universität, 2018. http://d-nb.info/1161096906/34.
Schulze, Torben Alexander [Verfasser]. "Quantum degenerate mixtures of 23Na-39K and coherent transfer paths in NaK molecules / Torben Alexander Schulze." Hannover : Gottfried Wilhelm Leibniz Universität, 2018. http://d-nb.info/116184547X/34.
Salez, Thomas. "Towards quantum degenerate atomic Fermi mixtures : design of the experiment and magnetic transport of lithium 6 - potassium 40." Paris 6, 2011. http://www.theses.fr/2011PA066403.
Pichery, Annie. "Theoretical study of quantum gas experiments in an Earth-orbiting research laboratory." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP010.
One of the major goals of fundamental physics is to unify general relativity, which describes macroscopic phenomena driven by the influence of gravity, with quantum mechanics, which focuses on effects at microscopic scales. Ensembles of cold atoms, as massive quantum objects, lie at the crossroads of both theories and appear as a test object of choice. They can be used to test theories that postulate a violation of Einstein's Equivalence Principles, in particular a violation of the Universality of Free Fall (UFF).Recent proposals suggest using mixtures of Bose-Einstein condensates (BEC) as sources for precision atom interferometry to perform UFF. These have the potential to match the precision of the best tests with classical test masses performed during the MICROSCOPE mission, and may even provide better results in the long term. The realization of experiments in microgravity, where atoms can float for long periods of time, allows longer interrogation times, thus increasing the performance of matter-wave sensors. To optimize the implementation of UFF tests, one needs exquisite control of the atoms due to stringent requirements on the error budget. In this work, we focus on the design of the input state with control over the position and velocity of the atom clouds, as well as their size evolution.The experiments studied here are designed with atom chip setups that manipulate atoms with magnetic traps. Most of the applications presented are experiments performed in the NASA Cold Atom Laboratory (CAL) aboard the International Space Station as part of the Consortium for Ultracold Atoms in Space (CUAS). This multi-user BEC machine allows the manipulation of single species BEC at its installation as well as dual species mixtures after upgrades. Following this chronology, we first study the dynamics of single species BEC and then extend the work to the manipulation of an interacting mixture of two BECs. The first step after calibrating the chip model is to design a fast and robust transport protocol to move the atoms away from the atom chip. We present and use a Shortcut-To-Adiabaticity (STA) protocol, based on reverse engineering, to transport the BEC and meet the requirements of position control at the sub- extmu m level and velocity control at the hundreds of extmu m/s level. The free expansion of the atom cloud with its inherent atomic density drop makes signal detection difficult. By analogy with light, it is possible to collimate the atom cloud with atomic lenses using the Delta-Kick Collimation (DKC) technique. Application to CAL resulted in expansion energies in the tens of pK level. To simulate the imaging process and to support the data analysis, theoretical models are presented that take into account the resolution effects of the camera and the frame transformations associated with the orientation of the camera or the orientation of the trapping potential with respect to the atom chip.Space allows the operation of Bose-Einstein condensate mixtures under miscibility conditions not possible on the ground. The colocation of the trap center for the different species in microgravity can lead to different topologies of the trap ground state. Moreover, the interaction energy between the species, which is almost negligible in the ground state, plays a significant role in the dynamics of the mixture during its transport. However, the simulation of the dynamics of interacting dual-species BEC mixtures is computationally challenging, particularly due to the long expansion times. In this work, scaling techniques to overcome these limitations are presented and illustrated in the case of space experiments in CAL and aboard sounding rockets. Such scaled-grid approaches make it possible to simulate long transports with free expansion times on the order of seconds, which would not be feasible with a fixed-grid approach on reasonable time scales, not to mention the problems of memory usage
McCarron, Daniel John. "A quantum degenerate mixture of ⁸⁷Rb and ¹³³Cs." Thesis, Durham University, 2011. http://etheses.dur.ac.uk/3242/.
Voigt, Arne-Christian. "Heteronuclear Molecules from a Quantum Degenerate Fermi-Fermi Mixture." Diss., lmu, 2009. http://nbn-resolving.de/urn:nbn:de:bvb:19-106171.
Conference papers on the topic "Quantum-Degenerate mixtures":
Ospelkaus-Schwarzer, S., C. Ospelkaus, K. Bongs, and K. Sengstock. "Quantum degenerate FermBose mixtures." In 2003 European Quantum Electronics Conference. EQEC 2003 (IEEE Cat No.03TH8665). IEEE, 2003. http://dx.doi.org/10.1109/eqec.2003.1314151.
Inguscio, Massimo, Giovanni Modugno, and Giacomo Roati. "Fermi-Bose and Bose-Bose K-Rb Quantum Degenerate Mixtures." In Proceedings of the XVIII International Conference on Atomic Physics. WORLD SCIENTIFIC, 2003. http://dx.doi.org/10.1142/9789812705099_0003.
Shelby, R. M., M. D. Levenson, and S. H. Perlmutter. "Nonclassical effects in a mode-locked optical parametric oscillator." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1988. http://dx.doi.org/10.1364/oam.1988.tua4.
Modugno, G., G. Roati, F. Ferlaino, and M. Inguscio. "Experiments with a quantum degenerate Fermi-Bose mixture." In 2003 European Quantum Electronics Conference. EQEC 2003 (IEEE Cat No.03TH8665). IEEE, 2003. http://dx.doi.org/10.1109/eqec.2003.1314146.
Reports on the topic "Quantum-Degenerate mixtures":
Jin, Deborah. Exploring Quantum Degenerate Bose-Fermi Mixtures Toward Cooper Pairing of Fermionic Atoms. Office of Scientific and Technical Information (OSTI), April 2011. http://dx.doi.org/10.2172/1011496.