Berry's Phases of Ground States of Interacting Spin-One Bosons: Chains of Monopoles and Monosegments

Abstract

We study Berry's connection potentials of many-body ground states of spin-one bosons with antiferromagnetic interactions in adiabatically varying magnetic fields. We find that Berry's connection potentials are generally determined by, instead of usual singular monopoles, linearly positioned monosegments each of which carries one unit of topological charge; in the absence of a magnetic field gradient this distribution of monosegments becomes a linear chain of monopoles. Consequently, Berry's phases consist of a series of step functions of magnetic fields; a magnetic field gradient causes rounding of these step-functions. We also calculate Berry's connection fields, profiles of monosegments and show that the total topological charge is conserved in a parameter space.

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Cited by in corpus (4)

• Geometric phases and criticality in spin chain systems
• Magnetically Stabilized Nematic Order I: Three-Dimensional Bipartite Optical Lattices
• Enabling Adiabatic Passages Between Disjoint Regions in Parameter Space through Topological Transitions
• Staircase in magnetization and entanglement entropy of spin squeezed condensates