Detection and Inhibition of Decoherence Through Collisions: A dynamical approach

Abstract

Quantum systems are intrinsically fragile and highly vulnerable to environmental noise, making the preservation of quantum states one of the fundamental challenges in realizing practical quantum technologies. We propose two noise-agnostic quantum state protection protocols based on a collisional model. The first protocol preserves quantum states of qubits without requiring complete prior knowledge of the underlying noise dynamics, and the second even protects a logical qubit under similar circumstances. These protocols provide robust protection for arbitrary single-qubit and entangled states against general noise processes. Furthermore, their capability to safeguard quantum states with an arbitrary number of qubits enhances the reliability, robustness, and scalability of emerging quantum architectures. These results establish the proposed framework as a promising approach for practical quantum information processing.