Editing Michel H. Devoret (section)

=== Quantum Tunneling and Energy Quantization ===
In the late 1980s and early 1990s, Devoret conducted groundbreaking experiments with '''superconducting Josephson junctions''' — devices where electrical current can tunnel through insulating barriers without resistance.

By manipulating these circuits at temperatures near '''absolute zero''', he observed '''quantum tunneling''' and '''discrete energy levels''', proving that '''macroscopic quantum coherence''' could exist in man-made devices. ''(source: Nature)''

This was revolutionary: it meant that '''quantum effects could be harnessed for technology''', not just observed in isolated particles.<blockquote>“Quantum mechanics is not confined to the microscopic world — it is a universal language that can be engineered,”

said Devoret in an interview following his Nobel announcement. ''(source: AP)''</blockquote>
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