Editing John Clarke (section)

=== Clarke’s Breakthrough — The SQUID Revolution ===
In the 1970s, Dr. John Clarke and his collaborators developed the '''Superconducting Quantum Interference Device''', known as the '''SQUID''' — one of the most sensitive magnetic sensors ever built.

The SQUID detects tiny changes in magnetic fields by exploiting '''quantum interference''' in superconducting loops. It can measure fields a billion times weaker than Earth’s magnetic field — sensitive enough to pick up brain and heart activity or to probe quantum fluctuations themselves. ''(source: Nature)''<blockquote>“We created an instrument that could listen to the faintest signals in the universe — whispers of quantum behavior,”

Clarke said in a 2025 interview after receiving the Nobel Prize. ''(source: AP)''</blockquote>