Description: Entanglement fidelity is a crucial measure in quantum computing that evaluates how well a quantum state is preserved during a manipulation or transmission process. This concept refers to the quality of quantum entanglement, which is a phenomenon where two or more particles are in a correlated state, such that the state of one particle is intrinsically linked to the state of the other, regardless of the distance separating them. Fidelity is expressed as a value between 0 and 1, where 1 indicates that the quantum state has been kept intact and 0 indicates that it has been completely lost. Entanglement fidelity is fundamental for assessing the effectiveness of quantum systems, as a high level of fidelity is essential for the functioning of quantum algorithms and the implementation of quantum communication protocols. In practice, fidelity can be measured through experiments that compare the final state of a quantum system with its initial state, allowing researchers and developers to optimize their systems and improve the stability of qubits, which are the basic units of information in quantum computing.
