Suppression of collision-induced dephasing by periodic, erratic, or noisy driving

TL;DR

This paper investigates various driving methods, including noisy, erratic, and periodic signals, to suppress collision-induced dephasing in a two-mode Bose-Hubbard system, comparing quantum Zeno and Kapitza effects.

Contribution

It provides a comparative analysis of different driving protocols for decoherence control near hyperbolic instability in quantum systems.

Findings

Erratic and noisy driving effectively suppresses decoherence via quantum Zeno effect.

High-frequency periodic driving induces the Kapitza stabilization.

Different driving strategies offer distinct advantages for coherence preservation.

Abstract

We compare different driving scenarios for controlling the loss of single particle coherence of an initially coherent preparation in the vicinity of the hyperbolic instability of the two-mode bose-Hubbard model. In particular we contrast the quantum Zeno suppression of decoherence by broad-band erratic or noisy driving, with the Kapitza effect obtained for high frequency periodic monochromatic driving.