Phase-controlled localization and directed transport in a bipartite lattice

TL;DR

This paper demonstrates how phase-controlled high-frequency modulation can manipulate quantum tunneling and localization in bipartite optical lattices, enabling directed transport and system stabilization.

Contribution

It introduces a phase-dependent control method for tunneling and localization in bipartite lattices, advancing coherent manipulation techniques.

Findings

Quantum tunneling depends on phase difference in modulation.

Dynamical localization can be controlled via phase adjustments.

Directed transport is achievable through phase tuning.

Abstract

We investigate coherent control of single particles held in a bipartite optical lattice via a combined high-frequency modulation. Our analytical results show that for the photon resonance case the quantum tunneling and dynamical localization depend on the phase difference between the modulation components, which leads to a different route of the coherent destruction of tunneling and a simple method for stabilizing the system to implement the directed transport. The results could be referable for manipulating the transport characterization of the similar tilted and shaken optical or solid-state systems, and also can be extended to the many-particle systems.