Quantum Coherence

see also:

quantum entanglement, quantum decoherence

Quantum coherence is a term from quantum physics that describes the ability of a quantum mechanical system to stably maintain its quantum mechanical states and generate interference patterns. In a coherent state, quantum states are precisely defined and exhibit regular and predictable behavior. This allows accurate measurement and control of the quantum mechanical properties of the system.

However, interactions with the environment always cause incoherence, especially in quantum physics. Such interactions lead to phase shifts and uncertainty in the quantum mechanical states, causing the coherence to fade and the system to become decoherent. Quantum coherence is therefore a delicate state that can only be maintained for limited times in many quantum mechanical systems.

Preserving quantum coherence is critical for many applications in quantum technology, including quantum computing, quantum communications, and precision measurements. Researchers are working on strategies to minimize decoherence, such as improved quantum sensor isolation, error correction techniques, and quantum error tolerance protocols. Understanding and controlling quantum coherence are therefore key challenges in quantum physics and for the development of powerful quantum-based technologies.