Auflistung nach Schlagwort "Statistical mechanics"

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  • Creating the first Bose-Einstein condensate in space 
    Lachmann, M.D.; Ahlers, H.; Becker, D.; Seidel, S.T.; Wendrich, T.; Rasel, Ernst Maria; Ertmer, Wolfgang; MAIUS-Team (Bellingham, WA : SPIE - International Society for Optical Engineering, 2018)
    On 23rd of January 2017 the first Bose-Einstein Condensate (BEC) in Space was created on-board the sounding rocket mission MAIUS-1. The successful launch marks a major advancement in the effort of performing matter wave ...
  • Disorder and superconductivity in doped semiconductor nanotubes 
    Shirakawa, T.; Nishimoto, S.; Ohta, Y.; Fukuyama, H. (Bristol : IOP Publishing Ltd., 2009)
    Finite-size systems of the one-dimensional attractive Hubbard model with random potential are studied as an effective model for doped semiconductor nanotubes. We calculate the binding energy of Cooper pairs and pair ...
  • Fast manipulation of Bose-Einstein condensates with an atom chip 
    Corgier, R.; Amri, S.; Herr, W.; Ahlers, H.; Rudolph, J.; Guéry-Odelin, D.; Rasel, Ernst Maria; Charron, E.; Gaaloul, Naceur (Bristol : Institute of Physics Publishing, 2018)
    We present a detailed theoretical analysis of the implementation of shortcut-to-adiabaticity protocols for the fast transport of neutral atoms with atom chips. The objective is to engineer transport ramps with durations ...
  • High-flux source system for matter-wave interferometry exploiting tunable interactions 
    Herbst, A.; Estrampes, T.; Albers, H.; Vollenkemper, V.; Stolzenberg, K.; Bode, S.; Charron, E.; Rasel, E.M.; Gaaloul, N.; Schlippert, D. (College Park, MD : APS, 2024)
    Atom interferometers allow determining inertial effects to high accuracy. Quantum-projection noise as well as systematic effects impose demands on large atomic flux as well as ultralow expansion rates. Here we report on a ...
  • Influence of the particle number on the spin dynamics of ultracold atoms 
    Heinze, Jannes; Deuretzbacher, Frank; Pfannkuche, Daniela (College Park, MD : American Physical Society, 2010)
    We study the dependency of the quantum spin dynamics on the particle number in a system of ultracold spin-1 atoms within the single-spatial-mode approximation. We find, for all strengths of the spin-dependent interaction, ...
  • The inhomogeneous Kibble-Zurek mechanism: Vortex nucleation during Bose-Einstein condensation 
    Del Campo, A.; Retzker, A.; Plenio, Martin B. (Bristol : IOP Publishing Ltd., 2011)
    The Kibble-Zurek mechanism is applied to the spontaneous formation of vortices in a harmonically trapped thermal gas following a temperature quench through the critical value for Bose-Einstein condensation. Whereas in the ...
  • Ionic polaron in a Bose-Einstein condensate 
    Astrakharchik, Grigory E.; Ardila, Luis A. Peña; Schmidt, Richard; Jachymski, Krzysztof; Negretti, Antonio (London : Springer Nature, 2021)
    The presence of strong interactions in a many-body quantum system can lead to a variety of exotic effects. Here we show that even in a comparatively simple setup consisting of a charged impurity in a weakly interacting ...
  • Long-range transverse Ising model built with dipolar condensates in two-well arrays 
    Li, Yongyao; Pang, Wei; Xu, Jun; Lee, Chaohong; Malomed, Boris A.; Santos, Luis (Bristol : Institute of Physics Publishing, 2017)
    Dipolar Bose-Einstein condensates in an array of double-well potentials realize an effective transverse Ising model with peculiar inter-layer interactions, that may result under proper conditions in an anomalous first-order ...
  • Nonquasiparticle states in the half-metallic ferromagnet simulated by the two-band Hubbard model 
    Nakano, K.; Shirakawa, T.; Ohta, Y. (Bristol : IOP Publishing Ltd., 2010)
    The density-matrix renormalization group method is used to study the three-band zigzag ladder model that simulates the electronic state of the t 2g-orbital system of the double string of the edge-shared CrO 6 octahedra in ...
  • Orbital-angular-momentum-resolved diagnostics for tracking internal phase evolution in multi-bound solitons 
    Zhao, Yuwei; Fan, Jintao; Song, Youjian; Hu, Minglie (Washington, DC : Optica, 2021)
    The generation of multi-bound solitons is a fascinating subject of investigation in many conservative and dissipative systems, such as photonics, fluid mechanics, Bose-Einstein condensates, and so on. In this study, we ...
  • Parametric amplification of matter waves in dipolar spinor Bose-Einstein condensates 
    Deuretzbacher, Frank; Gebreyesus, Garu; Topic, Oliver; Scherer, Manuel; Lücke, Bernd; Ertmer, Wolfgang; Arlt, Jan J.; Klempt, Carsten; Santos, Luis (College Park, MD : American Physical Society, 2010)
    Spin-changing collisions may lead under proper conditions to the parametric amplification of matter waves in spinor Bose-Einstein condensates. Magnetic dipole-dipole interactions, although typically very weak in alkalimetal ...
  • Quantum-Fluctuation-driven crossover from a dilute bose-einstein condensate to a macrodroplet in a dipolar quantum fluid 
    Chomaz, L.; Baier, S.; Petter, D.; Mark, M.J.; Wächtler, F.; Santos, Luis; Ferlaino, F. (College Park, MD : American Physical Society, 2016)
    In a joint experimental, theoretical effort, we report on the formation of a macrodroplet state in an ultracold bosonic gas of erbium atoms with strong dipolar interactions. By precise tuning of the s-wave scattering length ...
  • Rapid generation of all-optical K 39 Bose-Einstein condensates using a low-field Feshbach resonance 
    Herbst, A.; Albers, H.; Stolzenberg, K.; Bode, S.; Schlippert, D. (Woodbury, NY : Inst., 2022)
    Ultracold potassium is an interesting candidate for quantum technology applications and fundamental research as it allows controlling intra-atomic interactions via low-field magnetic Feshbach resonances. However, the ...
  • Symmetry-broken states in a system of interacting bosons on a two-leg ladder with a uniform Abelian gauge field 
    Greschner, Sebastian; Piraud, M.; Heidrich-Meisner, F.; McCulloch, I.P.; Schollwöck, U.; Vekua, T. (College Park, MD : American Physical Society, 2016)
    We study the quantum phases of bosons with repulsive contact interactions on a two-leg ladder in the presence of a uniform Abelian gauge field. The model realizes many interesting states, including Meissner phases, vortex ...
  • The sounds of science - A symphony for many instruments and voices 
    Alexander, Gerianne; Allen, Roland E.; Atala, Anthony; Bowen, Warwick P.; Coley, Alan A.; Goodenough, John B.; Katsnelson, Mikhail I.; Koonin, Eugene V.; Krenn, Mario; Madsen, Lars S.; Månsson, Martin; Mauranyapin, Nicolas P.; Melvin, Art I.; Rasel, Ernst; Reichl, Linda E.; Yampolskiy, Roman; Yasskin, Philip B.; Zeilinger, Anton; Lidström, Suzy (Bristol : Institute of Physics Publishing, 2020)
    Sounds of Science is the first movement of a symphony for many (scientific) instruments and voices, united in celebration of the frontiers of science and intended for a general audience. John Goodenough, the maestro who ...
  • The space atom laser: An isotropic source for ultra-cold atoms in microgravity 
    Meister, Matthias; Roura, Albert; Rasel, Ernst M.; Schleich, Wolfgang P. (Bristol : Institute of Physics Publishing, 2019)
    Atom laser experiments with Bose-Einstein condensates (BECs) performed in ground-based laboratories feature a coherent and directed beam of atoms which is accelerated by gravity. In microgravity the situation is fundamentally ...
  • Tunable dual-species Bose-Einstein condensates of 39K and 87Rb 
    Wacker, L.; Jørgensen, N.B.; Birkmose, D.; Horchani, R.; Ertmer, Wolfgang; Klempt, Carsten; Winter, N.; Sherson, J.; Arlt, Jan J. (College Park : American Physical Society, 2015)
    We present the production of dual-species Bose-Einstein condensates (BECs) of 39K and 87Rb. Preparation of both species in the |F=1,mF=−1⟩ state enabled us to exploit a total of three Feshbach resonances, which allows for ...
  • Unconventional phases of attractive Fermi gases in synthetic Hall ribbons 
    Ghosh, Sudeep Kumar; Greschner, Sebastian; Yadav, Umesh K.; Mishra, Tapan; Rizzi, Matteo; Shenoy, Vijay B. (College Park, MD : American Physical Society, 2017)
    An innovative way to produce quantum Hall ribbons in a cold atomic system is to use M hyperfine states of atoms in a one-dimensional optical lattice to mimic an additional "synthetic dimension." A notable aspect here is ...