The effects of trap-confinement and interatomic interactions on Josephson effects and macroscopic quantum self-trapping for a Bose–Einstein condensate

@article{Saha2019TheEO,
  title={The effects of trap-confinement and interatomic interactions on Josephson effects and macroscopic quantum self-trapping for a Bose–Einstein condensate},
  author={Abhik Kumar Saha and Kingshuk Adhikary and Subhanka Mal and Krishna Rai Dastidar and Bimalendu Deb},
  journal={Journal of Physics B: Atomic, Molecular and Optical Physics},
  year={2019},
  volume={52}
}
We theoretically study the effects of trap-confinement and interatomic interactions on Josephson oscillations (JO) and macroscopic quantum self-trapping (MQST) for a Bose–Einstein condensate confined in a trap which has a symmetric double-well potential along z-axis and 2D harmonic potentials along x- and y-axis. We consider three types of model interaction potentials: contact, long-range dipolar and finite-range potentials. Our results show that by changing the aspect ratio between the axial… 

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References

SHOWING 1-10 OF 22 REFERENCES

Coherent oscillations between two weakly coupled Bose-Einstein condensates: Josephson effects, π oscillations, and macroscopic quantum self-trapping

We discuss the coherent atomic oscillations between two weakly coupled Bose-Einstein condensates. The weak link is provided by a laser barrier in a (possibly asymmetric) double-well trap or by Raman

Josephson Junction Arrays with Bose-Einstein Condensates

This report reports on the direct observation of an oscillating atomic current in a one-dimensional array of Josephson junctions realized with an atomic Bose-Einstein condensate, which may allow investigation of phenomena so far inaccessible to superconducting Josephsonjunctions and lays a bridge between the condensates dynamics and the physics of discrete nonlinear media.

Realization of a resonant Fermi gas with a large effective range.

We have measured the interaction energy and three-body recombination rate for a two-component Fermi gas near a narrow Feshbach resonance and found both to be strongly energy dependent. Even for de

Quantum Coherent Atomic Tunneling between Two Trapped Bose-Einstein Condensates

We study the coherent atomic tunneling between two zero-temperature Bose-Einstein condensates (BEC) confined in a double-well magnetic trap. Two Gross-Pitaevskii equations for the self-interacting

Quantum and thermal fluctuations in bosonic Josephson junctions

We use the Bose-Hubbard Hamiltonian to study quantum fluctuations in canonical equilibrium ensembles of bosonic Josephson junctions at relatively high temperatures, comparing the results for finite

The a.c. and d.c. Josephson effects in a Bose–Einstein condensate

The measured chemical potential–current relation of the Bose–Einstein condensate Josephson junction shows that the system constitutes a trapped-atom interferometer with continuous readout is suitable for use as an analogue of the superconducting quantum interference device, which would sense rotation.

Atom–molecule coherence in a Bose–Einstein condensate

The oscillation frequency is in excellent agreement with the theoretical molecular binding energy, indicating that the author has created a quantum superposition of atoms and diatomic molecules—two chemically different species.

Nonlinear Josephson-type oscillations of a driven, two-component Bose-Einstein condensate

We propose an experiment that would demonstrate nonlinear Josephson-type oscillations in the relative population of a driven, two-component Bose-Einstein condensate. An initial state is prepared in

Realization of a single Josephson junction for Bose–Einstein condensates

We report on the realization of a double-well potential for Rubidium-87 Bose-Einstein condensates. The experimental setup allows for the investigation of two different dynamical phenomena known for

Classical bifurcation at the transition from Rabi to Josephson dynamics.

The results suggest that the internal bosonic Josephson effect in a rubidium spinor Bose-Einstein condensate is a model system which can be tuned from classical to the quantum regime and thus is an important step towards the experimental investigation of entanglement generation close to critical points.