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…
2 Citations
Dynamical phase diagram of a one-dimensional Bose-Josephson junction
- Physics
- 2021
We study the dynamics of one-dimensional bosons trapped in a box potential, in the presence of a barrier creating a tunable weak-link, thus realizing a one dimensional Bose Josephson junction. By…
Dynamical phase diagram of a one-dimensional Bose gas in a box with a tunable weak link: From Bose-Josephson oscillations to shock waves
- PhysicsPhysical Review A
- 2021
We study the dynamics of one-dimensional bosons trapped in a box potential, in the presence of a barrier creating a tunable weak-link, thus realizing a one dimensional Bose-Josephson junction. By…
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
- Physics
- 1997
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
- PhysicsScience
- 2001
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.
- PhysicsPhysical review letters
- 2012
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
- Physics
- 1997
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
- Physics
- 2013
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
- PhysicsNature
- 2007
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
- PhysicsNature
- 2002
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
- Physics
- 1999
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
- Physics
- 2006
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.
- PhysicsPhysical review letters
- 2010
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.