Oxford University researchers have demonstrated a quantum network with four qubits distributed across two locations connected by optical fibres; while strontium ions establish the connection, calcium ions preserve entanglement for over 10 seconds, enabling distributed quantum computing and secure communication applications.
Atomic memory keeps distant ions in entangled state for approximately 10 seconds
Combining different atom types (strontium and calcium) in a quantum network could allow distant quantum processors to work together for distributed computing.