Bose–Einstein condensates

Bose–Einstein condensates are a state of matter in which all the constituent particles exist in their lowest energy level. The Pauli Exclusion Principle prevents more than one electron (an example of a fermion) per quantum state; however no such limit is imposed on particles known as bosons, such as helium-4 atoms.

Latest Research and Reviews

  • Research
    | Open Access

    The crossover between the limiting ground states of fermionic systems, the so called BCS-BEC crossover, is of interest to superconductor and ultracold atomic gases communities. The authors study the dynamics of superconducting vortices in the crossover regime via the Hall response in a 2D superconductor LixZrNCl.

    • Max Heyl
    • , Kyosuke Adachi
    •  & Yoshihiro Iwasa
  • Research
    | Open Access

    Ultracold gases composed of lanthanide atoms are characterized by long-range dipolar interactions. These have now been exploited to observe quantized vortices in a dipolar condensate through the manipulation of the atoms by rotating external magnetic fields.

    • Lauritz Klaus
    • , Thomas Bland
    •  & Francesca Ferlaino
    Nature Physics 18, 1453-1458
  • Research
    | Open Access

    Synthetic lattice systems are powerful platforms for studying the influence of intrinsic nonlinearities on topological phenomena. Here the authors elucidate the topological transport of solitons in terms of Wannier functions displacement and they introduce a nonlinearity-induced topological transport effect that could be observed in ultracold quantum mixtures.

    • Nader Mostaan
    • , Fabian Grusdt
    •  & Nathan Goldman
  • Research
    | Open Access

    Quantum fluctuations stabilize dense self-bound macroscopic quantum states in quantum gases. This work places an Erbium dipolar ultracold atomic gas with dominantly attractive long-range interactions in a 1D periodic lattice, and uses interferometric techniques and numerical modeling to characterize the importance of beyond mean-field effects, revealing the emergence of spatially-extended and single-site localized (2D) droplets and signatures of an anisotropic 2D soliton.

    • Gabriele Natale
    • , Thomas Bland
    •  & Francesca Ferlaino
  • Research
    | Open Access

    Bose-Einstein condensate of excitons is expected in photo-excited bulk semiconductors, but a direct experimental evidence has been lacking. Here the authors report the observation of a condensate of 1s paraexcitons in Cu2O using real-space mid-infrared absorption imaging realized in a dilution refrigerator.

    • Yusuke Morita
    • , Kosuke Yoshioka
    •  & Makoto Kuwata-Gonokami

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