Experimental verification of Entanglement Witness of Dicke state on IBM QPU

Key Points

• A negative expectation value confirms genuine multipartite entanglement for the Dicke state, showing successful theoretical derivation.
• Experiments conducted on IBM QPU validate the entanglement witness with and without error mitigation techniques, enhancing reliability.
• This study demonstrates the potential for characterizing various quantum states using entanglement witnesses in quantum computing applications.
• The findings highlight the importance of error mitigation in achieving accurate results in quantum experiments involving entanglement.