Auflistung nach Schlagwort "Atoms"

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  • 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 ...
  • Remote frequency measurement of the 1S 0→ 3P 1 transition in laser-cooled 24Mg 
    Friebe, J.; Riedmann, M.; Wübbena, T.; Pape, A.; Kelkar, H.; Ertmer, Wolfgang; Terra, O.; Sterr, Uwe; Weyers, S.; Grosche, G.; Schnatz, H.; Rasel, Ernst Maria (Bristol : IOP Publishing Ltd., 2011)
    We perform Ramsey-Bordé spectroscopy on laser-cooled magnesium atoms in free fall to measure the 1S 0→ 3P 1 intercombination transition frequency. The measured value of 655 659 923 839 730 (48) Hz is consistent with our ...
  • Single-Atom Quantum Probes for Ultracold Gases Boosted by Nonequilibrium Spin Dynamics 
    Bouton, Quentin; Nettersheim, Jens; Adam, Daniel; Schmidt, Felix; Mayer, Daniel; Lausch, Tobias; Tiemann, Eberhard; Widera, Artur (College Park, MD : American Physical Society, 2020)
    Quantum probes are atomic sized devices mapping information of their environment to quantum-mechanical states. By improving measurements and at the same time minimizing perturbation of the environment, they form a central ...
  • Strong-field double ionization of Ar below the recollision threshold 
    Liu, Yunquan; Tschuch, S.; Rudenko, A.; Dürr, M.; Siegel, M.; Morgner, Uwe; Moshammer, R.; Ullrich, J. (American Physical Society, 2008)
    Nonsequential double ionization of Ar by 45 fs laser pulses (800 nm) at (4-7)×1013W/cm2 was explored in fully differential measurements. Well below the field-modified recollision threshold we enter the multiphoton regime. ...
  • Symmetry Breaking and Strong Persistent Plasma Currents via Resonant Destabilization of Atoms 
    Brée, C.; Hofmann, M.; Demircan, A.; Morgner, Uwe; Kosareva, O.; Savel'Ev, A.; Husakou, A.; Ivanov, M.; Babushkin, I. (American Physical Society, 2017)
    The ionization rate of an atom in a strong optical field can be resonantly enhanced by the presence of long-living atomic levels (so-called Freeman resonances). This process is most prominent in the multiphoton ionization ...
  • 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 ...
  • Three-beam atom interferometer 
    Hinderthür, H.; Pautz, A.; Rieger, V.; Ruschewitz, F.; Peng, J.L.; Sengstock, K.; Ertmer, Wolfgang (American Physical Society, 1997)
    We present an atom interferometer based on the interference of three partial matter waves in three different internal and external states. Coherent laser excitation acts as a beamsplitter to create a superposition state ...
  • 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 ...
  • Unraveling Two-Photon Entanglement via the Squeezing Spectrum of Light Traveling through Nanofiber-Coupled Atoms 
    Hinney, Jakob; Prasad, Adarsh S.; Mahmoodian, Sahand; Hammerer, Klemens; Rauschenbeutel, Arno; Schneeweiss, Philipp; Volz, Jürgen; Schemmer, Max (College Park, Md. : APS, 2021)
    We observe that a weak guided light field transmitted through an ensemble of atoms coupled to an optical nanofiber exhibits quadrature squeezing. From the measured squeezing spectrum we gain direct access to the phase and ...
  • Wave packet echoes in the motion of trapped atoms 
    Buchkremer, F.B.J.; Dumke, R.; Levsen, H.; Birkl, G.; Ertmer, Wolfgang (American Physical Society, 2000)
    A new echo technique to access the coherent and dissipative dynamics of atomic wave packet oscillations in trapping potentials was experimentally and systematically validated. By using this technique, the coherence time ...