Quantum entanglement detection has taken a significant step forward with a new method utilizing unitary transformations and ancilla state measurements for two-qubit and three-qubit pure states. This approach enables precise detection and quantification of entanglement, a crucial aspect of quantum information theory. By leveraging unitary transformations, researchers can effectively identify entangled states, laying the groundwork for advancements in long-distance quantum communication and scalable linear quantum computing. The technique's efficacy stems from its ability to harness ancilla states, which facilitate measurements that discern entangled from non-entangled states. As quantum computing continues to evolve, developments like this one have profound implications for the future of computation and cryptography, potentially undermining existing security protocols1. Therefore, understanding and detecting entanglement is essential for practitioners and researchers seeking to harness the power of quantum computing while mitigating its potential risks.