Browsing by Subject "Excited states"

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  • 40K-87Rb Feshbach resonances: Modeling the interatomic potential 
    Klempt, Carsten; Henninger, T.; Topic, O.; Will, J.; Ertmer, Wolfgang; Tiemann, E.; Arlt, Jan J. (College Park : American Physical Society, 2007)
    We have observed 28 heteronuclear Feshbach resonances in ten spin combinations of the hyperfine ground states of a 40K−87Rb mixture. The measurements were performed by observing the loss rates from an atomic mixture at ...
  • Detection of motional ground state population of a trapped ion using delayed pulses 
    Gebert, Florian; Wan, Yong; Wolf, F.; Heip, J.C.; Schmidt, Piet O. (Bristol : Institute of Physics Publishing, 2016)
    Efficient preparation and detection of the motional state of trapped ions is important in many experiments ranging from quantum computation to precision spectroscopy. We investigate the stimulated Raman adiabatic passage ...
  • Laser-Driven Anharmonic Oscillator: Ground-State Dissociation of the Helium Hydride Molecular Ion by Midinfrared Pulses 
    Wustelt, Philipp; Oppermann, Florian; Mhatre, Saurabh; Kübel, Matthias; Sayler, A. Max; Lein, Manfred; Gräfe, Stefanie; Paulus, Gerhard G. (College Park, Md. : APS, 2021)
    The vibrational motion of molecules represents a fundamental example of an anharmonic oscillator. Using a prototype molecular system, HeH+, we demonstrate that appropriate laser pulses make it possible to drive the nuclear ...
  • Modeling Photoassociative Spectra of Ultracold NaK + K 
    Shammout, Baraa; Karpa, Leon; Ospelkaus, Silke; Tiemann, Eberhard; Dulieu, Olivier (Washington, DC : American Chemical Society, 2023)
    A model for photoassociation of ultracold atoms and molecules is presented and applied to the case of 39K and 23Na39K bosonic particles. The model relies on the assumption that photoassociation is dominated by long-range ...
  • Photo-excited charge transfer from adamantane to electronic bound states in water 
    Wang, Xiangfei; Krause, Pascal; Kirschbaum, Thorren; Palczynski, Karol; Dzubiella, Joachim; Bande, Annika (Cambridge : RSC Publ., 2024)
    Aqueous nanodiamonds illuminated by UV light produce free solvated electrons, which may drive high-energy reduction reactions in water. However, the influence of water conformations on the excited-state electron-transfer ...
  • Resonant optical excitation of longitudinal-optical phonons and intermixing in InAsAlAs single quantum dots 
    Sarkar, D.; Van Der Meulen, H.P.; Calleja, J.M.; Meyer, J.M.; Haug, Rolf J.; Pierz, Klaus (College Park, MD : American Institute of Physics, 2008)
    Excitations of a single InAsAlAs self-assembled quantum dot were investigated by photoluminescence excitation spectroscopy. Resonant absorption by longitudinal-optical (LO) phonons of the quantum dot and the barriers is ...
  • Strong coupling Bose polarons in a two-dimensional gas 
    Ardila, L. A. Peña; Astrakharchik, G.E.; Giorgini, S. (College Park, MD : APS, 2020)
    We study the properties of Bose polarons in two dimensions using quantum Monte Carlo techniques. Results for the binding energy, the effective mass, and the quasiparticle residue are reported for a typical strength of ...
  • The coupled system (2)2Σ+ and (1)2Π of 7Li88Sr 
    Schwanke, Erik; Gerschmann, Julia; Knöckel, Horst; Ospelkaus, Silke; Tiemann, Eberhard (Bristol : IOP Publishing Ltd., 2020)
    We analyse rovibrational transitions of the (2)2Σ+-X(1)2Σ+ system of LiSr and find the energy levels of the (2)2Σ+ state to be perturbed by coupling between the (2)2Σ+ and (1)2Π states. We present an analysis of the coupled ...