No, quantum entanglement and quantum coherence are not operationally equivalent concepts in quantum physics. They refer to distinct phenomena with different characteristics.
Quantum entanglement is a phenomenon where two or more particles become correlated in such a way that the quantum state of the entire system cannot be described independently of each particle's state. In other words, the states of the entangled particles are interdependent, even when they are physically separated. This correlation is non-classical and cannot be explained by classical physics.
Quantum coherence, on the other hand, refers to a property of quantum systems where their quantum states exhibit a well-defined phase relationship. It describes the ability of a quantum system to maintain a superposition of states, where different states interfere with each other constructively or destructively. Coherence is a fundamental characteristic of quantum systems and is important for various quantum phenomena, such as interference and quantum computing.
While both quantum entanglement and quantum coherence are based on the principles of quantum mechanics, they represent distinct aspects of quantum behavior. Entanglement deals with correlations between particles, whereas coherence relates to the stability and phase relationship of quantum states. They can coexist in certain systems, but they are not operationally equivalent.