• Effects of Fermion Exchange on the Polarization of Exciton Condensates 

      Combescot, Monique; Combescot, Roland; Alloing, Mathieu; Dubin, François (APS Physics, 2015-03-04)
      Article
      Accés obert
      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 ...
    • Experimental evidence for the quantum condensation of ultracold dipolar excitons 

      Alloing, Mathieu (Universitat Politècnica de Catalunya, 2014-05-28)
      Tesi
      Accés obert
      In this thesis, we report experimental evidence of a "gray" condensate of excitons, as predicted theoretically by M. Combescot et al. Most importantly, the condensate is characterized by the macroscopic population of dark ...
    • 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
      Accés obert
      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 ...