Part 4/12:
However, the author urges caution. The apparent disconnect between these optimistic press releases and the tangible state of quantum technology is stark. The foundational approach mostly used involves superconducting circuits—highly advanced yet inherently limited. Such systems require cooling to near absolute zero—only a few milliKelvin—and the complexity of cooling grows exponentially as the number of qubits increases. This heating issue fundamentally limits how many qubits can coexist in a single cooling system.