Quantum-torque-induced breaking of magnetic interfaces in ultracold gases

@article{Farolfi2021QuantumtorqueinducedBO,
  title={Quantum-torque-induced breaking of magnetic interfaces in ultracold gases},
  author={A. Farolfi and Alessandro Zenesini and Dimitris Trypogeorgos and C. Mordini and Albert Gallem{\'i} and Arko Roy and Alessio Recati and G. Lamporesi and G. Ferrari},
  journal={Nature Physics},
  year={2021}
}
A rich variety of physical effects in the spin dynamics arises at the interface (domain wall) between different magnetic materials. Engineered physical systems based on magnetic interlaced structures have received wide interest in the last years as a starting point to implement spin transistors, memories and other spintronic devices. In this work, we use a coherently-coupled mixture of ultracold bosonic gases to realize analogues of magnetic junctions. The spatial inhomogeneity of the atomic… 
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References

SHOWING 1-10 OF 34 REFERENCES
Crossing Over from Attractive to Repulsive Interactions in a Tunneling Bosonic Josephson Junction.
TLDR
The exquisite agreement between theory and experiments enables the observation of a broad range of many body coherent dynamical regimes driven by tunable tunneling energy, interactions and external forces, with applications spanning from atomtronics to quantum metrology.
Manipulation of an elongated internal Josephson junction of bosonic atoms
We report on the experimental characterization of a spatially extended Josephson junction realized with a coherently-coupled two-spin-component Bose-Einstein condensate. The cloud is trapped in an
Spin-torque building blocks.
TLDR
By assembling magnetic nanodevices as building blocks with different functionalities, novel types of computing architecture can be envisaged, focus in particular on recent concepts such as magnonics and spintronic neural networks.
Observation of Spin Superfluidity in a Bose Gas Mixture.
The spin dynamics of a harmonically trapped Bose-Einstein condensed binary mixture of sodium atoms is experimentally investigated at finite temperature. In the collisional regime the motion of the
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
Relaxation to a Phase-Locked Equilibrium State in a One-Dimensional Bosonic Josephson Junction.
TLDR
An empirical model based on the analogy with the anharmonic oscillator is proposed to describe the effect of various experimental parameters on the nonequilibrium tunnel dynamics of two coupled one-dimensional Bose-Einstein quasicondensates deep in the Josephson regime.
Kinetic Theory of a Spin-1/2 Bose-Condensed Gas
We derive a kinetic theory for a spin-1/2 Bose-condensed gas of two-level atoms at finite temperatures. The condensate dynamics is described by a generalized Gross–Pitaevskii equation for the
Spin-dipole oscillation and polarizability of a binary Bose-Einstein condensate near the miscible-immiscible phase transition
We report on the measurement of the spin-dipole (SD) polarizability and of the frequency of the SD oscillation of a two-component Bose-Einstein condensate of sodium atoms occupying the $|3^2S_{1/2},
Dynamics of a tunable superfluid junction.
TLDR
The population dynamics of a Bose-Einstein condensate in a double-well potential throughout the crossover from Josephson dynamics to hydrodynamics is studied and implications for trapped matter-wave interferometers are discussed.
Direct observation of tunneling and nonlinear self-trapping in a single bosonic Josephson junction.
TLDR
A novel nonlinear effect known as macroscopic quantum self-trapping, which leads to the inhibition of large amplitude tunneling oscillations in superconducting and superfluid Josephson junctions is confirmed.
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