GHZ State
The Greenberger-Horne-Zeilinger (GHZ) state is a maximally entangled state, just like the Bell states. It represents one of the simplest examples of entanglement with more than \(2\) qubits in quantum mechanics.
IBM Quantum Composer: https://quantum.ibm.com/composer/
1. IBM Quantum Composer
\(\ket{GHZ} = \frac{\ket{000} + \ket{111}}{\sqrt{2}}\)
2. Circuit Measurement
Apply measurements to each qubit in the circuit. Then set up and run the circuit using the blue button in the top right of the IBM Quantum Composer.
The probability distribution will show that measuring this circuit will give \(\ket{000}\) and \(\ket{111}\) with \(\frac{1}{2}\) probability.
