Enviaments recents

  • Terahertz field control of in-plane orbital order in La0.5Sr1.5MnO4 

    Miller, Timothy A.; Chhajlany, Ravindra W.; Tagliacozzo, Luca; Green, Bertram; Kovalev, Sergey; Prabhakaran, Dharmalingam; Lewenstein, Maciej; Gensch, Michael; Wall, Simon (Nature Publishing Group, 2015-09-18)
    Article
    Accés obert
    In-plane anisotropic ground states are ubiquitous in correlated solids such as pnictides, cuprates and manganites. They can arise from doping Mott insulators and compete with phases such as superconductivity; however, their ...
  • Inequivalence of entanglement, steering, and Bell nonlocality for general measurements 

    Quintino, Marco Tulio; Vértesi, Tamas; Cavalcanti, Daniel; Augusiak, Remigiusz; Demianowicz, Maciej; Acín, Antonio; Brunner, Nicolas (APS, 2015-09-08)
    Article
    Accés obert
    Einstein-Podolsky-Rosen steering is a form of inseparability in quantum theory commonly acknowledged to be intermediate between entanglement and Bell nonlocality. However, this statement has so far only been proven for a ...
  • Nonlocality in many-body quantum systems detected with two-body correlators 

    Tura, J.; Augusiak, Remigiusz; Sainz, A. B.; Lücke, B.; Klempt, C.; Lewenstein, Maciej; Acin, Antonio (Science Direct, 2015-07-30)
    Article
    Accés obert
    Contemporary understanding of correlations in quantum many-body systems and in quantum phase transitions is based to a large extent on the recent intensive studies of entanglement in many-body systems. In contrast, much ...
  • Quench dynamics of dipolar fermions in a one-dimensional harmonic trap 

    Graß, Tobias (APS, 2015-08-08)
    Article
    Accés obert
    We study a system of few fermions in a one-dimensional harmonic trap and focus on the case of dipolar majority particles in contact with a single impurity. The impurity is used both for quenching the system and for ...
  • Locality of temperature in spin chains 

    Hernández-Santana, Senaida; Riera, Arnau; Hovhannisyan, Karen V.; Perarnau-Llobet, Martí; Tagliacozzo, Luca (IOP, 2015-08-18)
    Article
    Accés obert
    In traditional thermodynamics, temperature is a local quantity: a subsystem of a large thermal system is in a thermal state at the same temperature as the original system. For strongly interacting systems, however, the ...
  • Progress towards a unified approach to entanglement distribution 

    Streltsov, Alexander; Augusiak, Remigiusz; Demianowicz, Maciej; Lewenstein, Maciej (APS, 2015-07-30)
    Article
    Accés obert
    Entanglement distribution is key to the success of secure communication schemes based on quantum mechanics, and there is a strong need for an ultimate architecture able to overcome the limitations of recent proposals such ...
  • Energetics and Control of Ultracold Isotope-Exchange Reactions between Heteronuclear Dimers in External Fields 

    Tomza, Michał (APS, 2015-08-07)
    Article
    Accés obert
    We show that isotope-exchange reactions between ground-state alkali-metal, alkaline-earth-metal, and lanthanide heteronuclear dimers consisting of two isotopes of the same atom are exothermic with an energy change in the ...
  • Strong-coupling ansatz for the one-dimensional Fermi gas in a harmonic potential 

    Levinsen, Jesper; Massignan, Pietro; Bruun, Georg M.; Parish, Meera M. (Science, 2015-07-24)
    Article
    Accés obert
    A major challenge in modern physics is to accurately describe strongly interacting quantum many-body systems. One-dimensional systems provide fundamental insights because they are often amenable to exact methods. However, ...
  • Entanglement and Nonlocality are Inequivalent for Any Number of Parties 

    Augusiak, R.; Demianowicz, M.; Tura, J.; Acín, Antonio (APS, 2015-07-15)
    Article
    Accés obert
    Understanding the relation between nonlocality and entanglement is one of the fundamental problems in quantum physics. In the bipartite case, it is known that these two phenomena are inequivalent, as there exist entangled ...
  • Fragmented condensation in Bose–Hubbard trimers with tunable tunnelling 

    Gallemí, A.; Guilleumas, M.; Martorell, J.; Mayol, R.; Polls, A.; Juliá-Díaz, Bruno (IOP, 2015-07-15)
    Article
    Accés obert
    We consider a Bose–Hubbard (BH) trimer, i.e. an ultracold Bose gas populating three quantum states. The latter can be either different sites of a triple-well potential or three internal states of the atoms. The bosons can ...

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