Auflistung Fakultät für Mathematik und Physik nach Lizenz

Auflistung Fakultät für Mathematik und Physik nach Lizenz

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  • Achieving ground state and enhancing optomechanical entanglement by recovering information 
    Miao, Haixing; Danilishin, Stefan L.; Mueller-Ebhardt, Helge; Chen, Yanbei (Bristol : IOP Publishing Ltd., 2010)
    For cavity-assisted optomechanical cooling experiments, in order to achieve the quantum ground state of the mechanical oscillator, the cavity bandwidth needs to be smaller than the mechanical frequency. In the literature, ...
  • Adiabatic spin cooling using high-spin Fermi gases 
    Colomé-Tatché, Maria; Klempt, Carsten; Santos, Luis; Vekua, Teimuraz (Bristol : IOP Publishing Ltd., 2011)
    Spatial entropy redistribution plays a key role in adiabatic cooling of ultra-cold lattice gases. We show that high-spin fermions with a spatially variable quadratic Zeeman coupling may allow for the creation of an inner ...
  • Adsorbate induced refacetting: Pb chains on Si(557) 
    Czubanowski, M.; Schuster, A.; Akbari, S.; Pfnür, Herbert; Tegenkamp, Christoph (Bristol : IOP Publishing Ltd., 2007)
    The structure on the atomic and mesoscopic scale of Pb adsorbed on Si(557) has been investigated by high-resolution low energy electron diffraction (SPA-LEED). Depending on Pb coverage in the range between 1.2 and 1.6 ...
  • Analysis of localization phenomena in weakly interacting disordered lattice gases 
    Schulte, T.; Drenkelforth, S.; Kruse, J.; Tiemeyer, R.; Sacha, K.; Zakrzewski, J.; Lewenstein, M.; Ertmer, Wolfgang; Arlt, Jan J. (Bristol : IOP Publishing Ltd., 2006)
    Disorder plays a crucial role in many systems particularly in solid state physics. However, the disorder in a particular system cannot usually be chosen or controlled. We show that the unique control available for ultracold ...
  • Asymptotic scattering and duality in the one-dimensional three-state quantum Potts model on a lattice 
    Rapp, Akos; Schmitteckert, Peter; Takacs, Gabor; Zarand, Gergely (Bristol : IOP Publishing Ltd., 2013-01-28)
    We determine numerically the single-particle and the two-particle spectrum of the three-state quantum Potts model on a lattice by using the density matrix renormalization group method, and extract information on the ...
  • BCS pairing in a trapped dipolar Fermi gas 
    Baranov, M.A.; Dobrek, L.; Lewenstein, M. (Bristol : IOP Publishing Ltd., 2004)
    We present a detailed study of the BCS pairing transition in a trapped polarized dipolar Fermi gas. In the case of a shallow nearly spherical trap, we find a decrease in the transition temperature as a function of the trap ...
  • Causal structure of the entanglement renormalization ansatz 
    Beny, Cedric (Bristol : IOP Publishing Ltd., 2013-02-13)
    We show that the multiscale entanglement renormalization ansatz (MERA) can be reformulated in terms of a causality constraint on discrete quantum dynamics. This causal structure is that of de Sitter space with a flat ...
  • Charge Exchange in Low-Energy H, D + C4+ Collisions with Full Account of Electron Translation 
    Belyaev, A. K.; Grosser, J.; Liévin, J.; Vaeck, N. (Basel : MDPI AG, 2002)
    We report the application of the quantum approach, which takes full account of electron translation at low collisional energies, to the charge exchange process H, D + C4+ → H+, D+ + C3+(3s; 3p; 3d). The partial and the ...
  • Damped Bloch oscillations of Bose-Einstein condensates in disordered potential gradients 
    Drenkelforth, S.; Buening, G. Kleine; Will, J.; Schulte, T.; Murray, N.; Ertmer, Wolfgang; Santos, Luis; Arlt, Jan J. (Bristol : IOP Publishing Ltd., 2008)
    We investigate both experimentally and theoretically disorder-induced damping of Bloch oscillations of Bose-Einstein condensates in optical lattices. The spatially inhomogeneous force responsible for the damping is realized ...
  • Euler equations on a semi-direct product of the diffeomorphisms group by itself 
    Escher, Joachim; Ivanov, Rossen; Kolev, Boris (Springfield, MO : American Institute of Mathematical Sciences, 2011)
    The geodesic equations of a class of right invariant metrics on the semi-direct product Diff(S 1)sDiff(S 1) are studied. The equations are explicitly described, they have the form of a system of coupled equations of ...
  • Exciton-mediated photothermal cooling in GaAs membranes 
    Xuereb, Andre; Usami, Koji; Naesby, Andreas; Polzik, Eugene S.; Hammerer, Klemens (Bristol : IOP Publishing Ltd., 2012-08-29)
    Cooling of the mechanical motion of a GaAs nano-membrane using the photothermal effect mediated by excitons was recently demonstrated by some of the authors (Usami et al 2012 Nature Phys. 8 168) and provides a clear example ...
  • Experimental simulation and limitations of quantum walks with trapped ions 
    Matjeschk, R.; Schneider, C; Enderlein, M.; Huber, T.; Schmitz, H.; Glueckert, J.; Schaetz, T. (Bristol : IOP Publishing Ltd., 2012)
    We examine the prospects of discrete quantum walks (QWs) with trapped ions. In particular, we analyze in detail the limitations of the protocol of Travaglione and Milburn (2002 Phys. Rev. A 65 032310) that has been implemented ...
  • Fast transport of Bose-Einstein condensates 
    Torrontegui, E.; Chen, Xi; Modugno, M.; Schmidt, S.; Ruschhaupt, A.; Muga, J. G. (Bristol : IOP Publishing Ltd., 2012)
    We propose an inverse method to accelerate without final excitation the adiabatic transport of a Bose-Einstein condensate. The method is based on a partial extension of the Lewis-Riesenfeld invariants and provides transport ...
  • Gravitational wave detectors 
    Aufmuth, Peter; Danzmann, Karsten (Bristol : Institute of Physics Publishing, 2005)
    The existence of gravitational radiation is a prediction of Einstein's general theory of relativity. Gravitational waves are perturbations in the curvature of spacetime caused by accelerated masses. Since the 1960s ...
  • Height analysis of amorphous and crystalline ice structures on Cu(111) in scanning tunneling microscopy 
    Mehlhorn, Michael; Morgenstern, Karina (Bristol : IOP Publishing Ltd., 2009)
    Scanning tunneling microscopy imaging of amorphous and crystalline D2O ice on Cu(111) is discussed with respect to the apparent and the real heights of these structures above the metal surface. The apparent height increases ...
  • High-order harmonic generation directly from a filament 
    Steingrube, D.S.; Schulz, E.; Binhammer, Thomas; Gaarde, M.B.; Couairon, A.; Morgner, Uwe; Kovacev, M. (Bristol : IOP Publishing Ltd., 2011)
    The synthesis of isolated attosecond pulses (IAPs) in the extreme ultraviolet (XUV) spectral region has opened up the shortest time scales for timeresolved studies. It relies on the generation of high-order harmonics (HHG) ...
  • 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 ...
  • Landau levels of cold atoms in non-Abelian gauge fields 
    Jacob, A.; Ohberg, P.; Juzeliunas, G.; Santos, Luis (Bristol : IOP Publishing Ltd., 2008)
    The Landau levels of cold atomic gases in non-Abelian gauge fields are analyzed. In particular we identify effects on the energy spectrum and density distribution which are purely due to the non-Abelian character of the ...
  • Laser interferometry with translucent and absorbing mechanical oscillators 
    Friedrich, Daniel; Kaufer, Henning; Westphal, Tobias; Yamamoto, K.; Sawadsky, Andreas; Ya Khalili, F.; Danilishin, S.L.; Goßler, Stefan; Danzmann, Karsten; Schnabel, Roman (Bristol : IOP Publishing Ltd., 2011)
    The sensitivity of laser interferometers can be pushed into regimes that enable the direct observation of the quantum behaviour of mechanical oscillators. In the past, membranes with subwavelength thickness (thin films) ...
  • Long-range interaction of copper adatoms and copper dimers on Ag(111) 
    Morgenstern, Karina; Rieder, Karl-Heinz (Bristol : IOP Publishing Ltd., 2005)
    Formation and motion of copper adatoms and addimers on Ag( 1 1 1) are investigated with low-temperature scanning tunnelling microscopy between 6 and 25 K. Adatoms move between fcc and hcp sites with a strong preference for ...

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