Fragmented many-body ground states for scalar bosons in a single trap

Abstract

We investigate whether the many-body ground states of bosons in a generalized two-mode model with localized inhomogeneous single-particle orbitals and anisotropic long-range interactions (e.g. dipole-dipole interactions), are coherent or fragmented. It is demonstrated that fragmentation can take place in a single trap for positive values of the interaction couplings, implying that the system is potentially stable. Furthermore, the degree of fragmentation is shown to be insensitive to small perturbations on the single-particle level.

4 pages of RevTex4, 3 figures; as published in Physical Review Letters

References in corpus (5)

• Strong dipolar effects in a quantum ferrofluid
• Fragmentation of Bose-Einstein Condensates
• Stability of quasi-two-dimensional Bose-Einstein condensates with dominant dipole-dipole interactions
• Formation and dynamics of many-boson fragmented states in attractive one-dimensional ultra-cold gases
• The absence of fragmentation in Bose-Einstein condensates

Cited by in corpus (7)

• Robust Mesoscopic Superposition of Strongly Correlated Ultracold Atoms
• Collective excitation frequencies and stationary states of trapped dipolar Bose-Einstein condensates in the Thomas-Fermi regime
• Fragmented Many-Body states of definite angular momentum and stability of attractive 3D Condensates
• Emergence of a new pair-coherent phase in many-body quenches of repulsive bosons
• Degeneracy of Many-body Quantum States in an Optical Lattice with a Uniform Magnetic Field
• Time-resolved density correlations as probe of squeezing in toroidal Bose-Einstein condensates
• Stability of spherically trapped three-dimensional Bose-Einstein condensates against macroscopic fragmentation