Enhancing Quantum Synchronization in a driven qubit system coupled to a structured environment

TL;DR

This paper demonstrates that applying periodic modulation to a driven qubit in a structured environment significantly enhances quantum synchronization, with implications for controlling phase dynamics in quantum systems.

Contribution

It introduces a method of using frequency modulation combined with non-Markovian effects to achieve stable phase locking and improved quantum synchronization.

Findings

Frequency modulation enhances quantum synchronization.

Tuning modulation amplitude affects phase locking.

Non-Markovian effects contribute to stability.

Abstract

In this paper, we delve into the issue of Quantum Synchronization in a driven two-level (qubit) system situated within a structured environment. Our findings have practical implications as we discover that adding a time-dependent periodic modulation to the transition frequency of the qubit can significantly enhance quantum synchronization. We first discovered the phase preference and, consequently, the phase locking conditions in our system using the Husimi Q-function. It is revealed that combining frequency modulation and non-Markovian effects enables us to achieve a stable phase-locking for the system. We show that tuning the amplitude-tofrequency ratio of the modulation process on the zeros of the zeroth-order Bessel function led to phase locking and, thus, surprisingly enhances quantum synchronization in the system. These results provide new insights into efficiently understanding phase dynamics in quantum environments.