Quantum Feedback Control in Noisy Systems: Towards Fault-Tolerant Quantum Operations

Abstract

In order to provide fault-tolerant quantum operations, quantum feedback control has become a vital technique for reducing the effects of noise and decoherence in quantum systems. For the successful application of quantum computing, quantum communication, and quantum sensing in noisy quantum settings, the coherence of quantum states must be preserved. the fundamentals of quantum feedback control, emphasizing techniques for correction and real-time monitoring that maintain quantum coherence. a number of feedback control strategies, such as continuous quantum measurement, quantum error correction codes, and adaptive control methods that modify system parameters on the fly. We demonstrate how these methods enhance system robustness and open the door to scalable and dependable quantum operations by examining recent developments in the field. provides insights into the future of developing fault-tolerant quantum systems that can function in noisy environments and addresses the difficulties related to feedback control in the Noisy Intermediate-Scale Quantum (NISQ) era.