US Patent 11875135 Quantum entanglement protection

Quantum entanglement protection is disclosed. An entanglement checker receives, from a requestor, a request associated with a first qubit. In response to receiving the request, the entanglement checker accesses qubit entanglement information that identifies an entanglement status of the first qubit. The entanglement checker determines, based on the qubit entanglement information, the entanglement status of the first qubit, and sends a response to the requestor based on the entanglement status.