Macroscopic spin tunneling and quantum critical behavior of a condensate in double-well potential

Abstract

In a previous work (PRL 87, 140405), we have shown that a spinor condensate confined in a periodic or double-well potential exhibits ferromagnetic behavior due to the magnetic dipole-dipole interactions between different wells, and in the absence of external magnetic field, the ground state has a two-fold degeneracy. In this work, we demonstrate the possibility of observing macroscopic quantum spin tunneling between these two degenerate states and show how the tunneling rate critically depends on the strength of the transverse field.

4 pages, 3 figures

References in corpus (6)

• Tunable Quantum Tunneling of Magnetic Domain Walls
• "Supersolid" self-bound Bose condensates via laser-induced interatomic forces
• Ferromagnetism in a lattice of Bose condensates
• Spin waves in a Bose-condensed atomic spin chain
• Tunable tunneling: An application of stationary states of Bose-Einstein condensates in traps of finite depth
• Macroscopic quantum tunneling of two-component Bose-Einstein condensates

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• Josephson dynamics of a spin-orbit coupled Bose-Einstein condensate in a double well potential
• Dipolar and spinor bosonic systems
• Macroscopic quantum tunnelling of Bose-Einstein condensates in a finite potential well
• Transporting, splitting and merging of atomic ensembles in a chip trap
• Entangled quantum tunneling of two-component Bose-Einstein condensates
• Josephson oscillations in binary mixtures of F=1 spinor BECs
• Relations between bosonic quadrature squeezing and atomic spin squeezing
• Weakly linked binary mixtures of F=1 87-Rb Bose-Einstein condensates
• Magnetism in a lattice of spinor Bose condensates
• Spinor BECs in a double-well: population transfer and Josephson oscillations
• Entanglement and spin squeezing in the three-qubit transverse Ising model
• Spin-orbit coupled Bose-Einstein condensates in a double well
• Macroscopic quantum coherence in spinor condensates confined in an anisotropic potential
• Tunnelling of condensate magnetization in a double-well potential
• Spin Squeezing, Negative Correlations, and Concurrence in the Quantum Kicked Top Model
• Spin Josephson vortices in two tunnel coupled spinor Bose gases
• Bosons in a double-well potential: Understanding the interplay between disorder and interaction in a simple model
• Quantum metrology with precision reaching beyond-$1/N$ scaling through $N$-probe entanglement generating interactions
• Interaction-controlled impurity transport in trapped mixtures of ultracold bosons
• Quantum dynamics of a binary mixture of BECs in a double well potential: an Holstein-Primakoff approach
• Stationary states and quantum quench dynamics of Bose-Einstein condensates in a double-well potential