Dynamical phase diagram of ultracold Josephson junctions

@article{Xhani2020DynamicalPD,
  title={Dynamical phase diagram of ultracold Josephson junctions},
  author={K. Xhani and Luca Galantucci and Carlo F. Barenghi and G. Roati and Andrea Trombettoni and Nikolaos P. Proukakis},
  journal={arXiv: Quantum Gases},
  year={2020}
}
We provide a complete study of the phase diagram characterising the distinct dynamical regimes emerging in a three-dimensional Josephson junction in an ultracold quantum gas. Considering trapped ultracold superfluids separated into two reservoirs by a barrier of variable height and width, we analyse the population imbalance dynamics following a variable initial population mismatch. We demonstrate that as the chemical potential difference is increased, the system transitions from Josephson… Expand
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References

SHOWING 1-10 OF 79 REFERENCES
Introduction to Superconductivity 2nd ed (New York: McGraw-Hill
  • 1996
R28–R31 URL https://link.aps
  • Phys. Rev. A
  • 1998
Introduction to Superconductivity 2nd edn (New York: McGraw-Hill
  • 1996
  • 2020
An ideal Josephson junction in an ultracold two-dimensional Fermi gas
TLDR
The realization of a Josephson junction in an ultracold 2D Fermi gas is reported and the frequency of Josephson oscillations as a function of the phase difference across the junction is measured and excellent agreement with the sinusoidal current phase relation of an idealJosephson junction is found. Expand
Critical Transport and Vortex Dynamics in a Thin Atomic Josephson Junction.
TLDR
This work unambiguously link dissipation to vortex ring nucleation and dynamics, demonstrating that quantum phase slips are responsible for the observed resistive current. Expand
Josephson junction dynamics in a two-dimensional ultracold Bose gas
We investigate the Berezinskii-Kosterlitz-Thouless (BKT) scaling of the critical current of Josephson junction dynamics across a barrier potential in a two-dimensional (2D) Bose gas, motivated byExpand
Quantum interference of currents in an atomtronic SQUID
TLDR
The authors demonstrate quantum interference of currents in the atomtronic analog of a SQUID using Bose-Einstein condensates of 87 Rb atoms to show the possibility of studying various interesting SQUID physics with anatomtronic SQUID and especially, macroscopic quantum phenomena with currents may be realized with an atomtronics SQUID toward the goal of quantum metrology of rotation sensing. Expand
Strongly correlated superfluid order parameters from dc Josephson supercurrents
TLDR
The observation of dc Josephson supercurrents in strongly interacting fermionic superfluids across a tunneling barrier in the absence of any applied potential difference suggests that coherent Josephson transport may be used to pin down superfluid order parameters in diverse atomic systems, even in the presence of strong correlations. Expand
Breaking of Josephson junction oscillations and onset of quantum turbulence in Bose–Einstein condensates
We analyse the formation and the dynamics of quantum turbulence in a two-dimensional Bose-Einstein condensate with a Josephson junction barrier modelled using the Gross-Pitaevskii equation. We showExpand
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