Sure, qubits are like coins that can land on heads or tails, or both at the same time—thanks to superposition—and they can also whisper to each other across the void, which is entanglement, but keeping that whispering stable is a bit of a juggling act because of decoherence and noise.

I’m most intrigued by superconducting circuits because the Josephson junctions let you engineer the potential wells like a playground for the qubit, but the challenge is keeping the microwave drive and the cryostat’s vacuum isolated long enough to apply the surface‑code routines before thermal kicks push the state out of superposition.