Now showing items 13-24 of 26

  • Quantum simulation of non-trivial topology 

    Boada, Octavi; Celi, Alessio; Rodríguez-Laguna, Javier; Latorre, José I.; Lewenstein, Maciej (IOP, 2015-04-15)
    Article
    Open Access
    We propose several designs to simulate quantum many-body systems in manifolds with a non-trivial topology. The key idea is to create a synthetic lattice combining real-space and internal degrees of freedom via a suitable ...
  • Vortex macroscopic superpositions in ultracold bosons in a double-well potential 

    Garcia-March, M. A.; Carr, Lincoln D. (2015-03-23)
    Article
    Open Access
    We study macroscopic superpositions in the orbital rather than the spatial degrees of freedom, in a three-dimensional double-well system. We show that the ensuing dynamics of N interacting excited ultracold bosons, which ...
  • Synthetic magnetic fluxes and topological order in one-dimensional spin systems 

    Graß, Tobias; Muschik, Christine; Celi, Alessio; Chhajlany, Ravindra W.; Lewenstein, Maciej (APS Physics, 2015-06-11)
    Article
    Open Access
    Engineering topological quantum order has become a major field of physics. Many advances have been made by synthesizing gauge fields in cold atomic systems. Here we carry over these developments to other platforms which ...
  • Non-standard Hubbard models in optical lattices: a review 

    Dutta, Omjyoti; Gajda, Mariusz; Lewenstein, Maciej; Lühmann, Dirk-Sören; Malomed, Boris A.; Sowiński, Tomasz; Zakrzewski, Jakub (IOP, 2015-05-28)
    Article
    Open Access
    Originally, the Hubbard model was derived for describing the behavior of strongly correlated electrons in solids. However, for over a decade now, variations of it have also routinely been implemented with ultracold atoms ...
  • Long-lived spin coherence of indirect excitons in GaAs coupled quantum wells 

    Beian, Mussie; Alloing, Mathieu; Cambril, Edmond; Gomez Carbonell, Carmen; Osmond, Johann; Lemaître, Aristide; Dubin, François (IOP, 2015-04-30)
    Article
    Open Access
    We study spatially indirect excitons confined in a symmetric GaAs double quantum well. We show that the spin polarisation of very dilute gases can be optically imprinted, in both pure and superposition states. In the regime ...
  • High-order harmonic generation driven by plasmonic fields: a new route towards the generation of UV and XUV photons? 

    Ciappina, M. F.; Pérez-Hernández, J. A.; Roso, L.; Zaïr, A.; Lewenstein, Maciej (IOP, 2015-04-16)
    Article
    Open Access
    We present theoretical investigations of high-order harmonic generation (HHG) resulting from the interaction of noble gases with different kind of temporally and spatially synthesized laser fields. These fields, based on ...
  • Carrier-Wave Rabi-Flopping Signatures in High-Order Harmonic Generation for Alkali Atoms 

    Ciappina, M. F; Pérez-Hernández, J. A.; Landsman, A. S.; Zimmermann, T.; Lewenstein, Maciej; Roso, L.; Krausz, F. (APS Physics, 2015-04-08)
    Article
    Open Access
    We present a theoretical investigation of carrier-wave Rabi flopping in real atoms by employing numerical simulations of high-order harmonic generation (HHG) in alkali species. Given the short HHG cutoff, related to the ...
  • Quantum Brownian motion with inhomogeneous damping and diffusion 

    Massignan, Pietro; Lampo, Aniello; Wehr, Jan; Lewenstein, Maciej (APS Physics, 2015-03-23)
    Article
    Open Access
    We analyze the microscopic model of quantum Brownian motion, describing a Brownian particle interacting with a bosonic bath through a coupling which is linear in the creation and annihilation operators of the bath, but may ...
  • Effects of Fermion Exchange on the Polarization of Exciton Condensates 

    Combescot, Monique; Combescot, Roland; Alloing, Mathieu; Dubin, François (APS Physics, 2015-03-04)
    Article
    Open Access
    Exchange interaction is responsible for the stability of elementary boson condensates with respect to momentum fragmentation. This remains true for composite bosons when single fermion exchanges are included but spin ...
  • Weak Ergodicity Breaking of Receptor Motion in Living Cells Stemming from Random Diffusivity 

    Manzo, Carlo; Torreno-Pina, Juan A.; Massignan, Pietro; Lapeyre, Gerald J.; Lewenstein, Maciej; García Parajo, María F. (APS Physics, 2015-02-25)
    Article
    Open Access
    Molecular transport in living systems regulates numerous processes underlying biological function. Although many cellular components exhibit anomalous diffusion, only recently has the subdiffusive motion been associated ...
  • Conformal data from finite entanglement scaling 

    Stojevic, Vid; Haegeman, Jutho; McCulloch, I. P.; Tagliacozzo, Luca; Verstraete, Frank (APS Physics, 2015-01-20)
    Article
    Open Access
    In this paper, we apply the formalism of translation invariant (continuous) matrix product states in the thermodynamic limit to (1 + 1)-dimensional critical models. Finite bond dimension bounds the entanglement entropy ...
  • Quantum mechanics: No more fields 

    Lewenstein, Maciej (Nature Publishing group, 2015-01-05)
    Article
    Open Access
    A self-accelerating electronic wave packet can acquire a phase akin to the Aharonov–Bohm effect, but in the absence of a magnetic field.