This quantum circuit demonstrates the monogamy of entanglement by attempting to share entanglement among three qubits.
```python
from qiskit import QuantumCircuit
# Create a circuit with 3 qubits and 3 classical bits
qc = QuantumCircuit(3, 3)
# Create a Bell state between qubits 0 and 1
qc.h(0)
qc.cx(0, 1)
# Attempt to entangle qubit 0 with qubit 2
qc.cx(0, 2)
# Measure all qubits
qc.measure([0, 1, 2], [0, 1, 2])
```
This quantum circuit demonstrates the **monogamy of entanglement**. It starts by creating a Bell state between qubits 0 and 1, establishing maximal entanglement between them. It then attempts to entangle qubit 0 with qubit 2 using a CNOT gate. Due to the monogamy property of entanglement, qubits 0 and 2 cannot become fully entangled without reducing the entanglement between qubits 0 and 1. The final measurements of all three qubits reveal the effects of attempting to share entanglement among more than two qubits.'Failed to run program: \'409 Client Error: Conflict for url: https://api.quantum.ibm.com/runtime/jobs. {"errors":[{"message":"You have reached the limit of 3 pending jobs. Please wait for a job to complete or cancel one before submitting anything new.","code":3458,"solution":"Wait until some previous jobs were finished. You can cancel pending jobs to run new jobs.","more_info":"https://docs.quantum-computing.ibm.com/errors"}]}\''