Sudden death of particle-pair Bloch oscillation and unidirectional propagation in a one-dimensional driven optical lattice

Abstract

We study the dynamics of bound pairs in the extended Hubbard model driven by a linear external field. It is shown that two interacting bosons or singlet fermions with nonzero on-site and nearest-neighbor interaction strengths can always form bound pairs in the absence of an external field. There are two bands of bound pairs, one of which may have incomplete wave vectors when it has an overlap with the scattering band, referred to as an imperfect band. In the presence of the external field, the dynamics of the bound pair in the perfect band exhibits distinct Bloch-Zener oscillation (BZO), while in the imperfect band the oscillation presents a sudden death. The pair becomes uncorrelated after the sudden death and the BZO never comes back. Such dynamical behaviors are robust even for the weak-coupling regime and thus can be used to characterize the phase diagram of the bound states.

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Cited by in corpus (9)

• Interaction-induced two-photon edge states in extended Hubbard model realized in a cavity array
• Flux induced re-entrant dynamics in the quantum walk of interacting bosons
• Two-doublon Bloch oscillations in the mass-imbalanced extended Fermi-Hubbard model
• Topologically protected two-fluid edge states
• Topological quantum slinky motion in resonant extended Bose-Hubbard model
• Resonant dynamics of spin cluster in a periodically driven one-dimensional Rydberg lattice
• Formations of generalized Wannier-Stark ladders: Theorem and applications
• Field induced conducting state in Mott insulator
• Probing the topology of the two-photon bands via time-dependent quantum walks