Published: 6 October 2025NobelPrize.orgScience & Technology
How Nobel Physics 2025 Work on Macroscopic Quantum Effects Led to Quantum Computing Revolution
The 2025 Nobel Prize in Physics honours work that demonstrated quantum mechanics is not limited to the subatomic world. John Clarke pioneered the SQUID (Superconducting Quantum Interference Device) at UC Berkeley, one of the most sensitive instruments for measuring magnetic fields. Michel Devoret at Yale created the first superconducting qubit — the 'quantronium' — which became a building block for quantum computers.
John Martinis at UC Santa Barbara led Google's quantum supremacy experiment in 2019, when the Sycamore processor performed a calculation in 200 seconds that would take a classical supercomputer approximately 10,000 years. Their combined work demonstrated that macroscopic electrical circuits can exhibit quantum behaviour including superposition and entanglement.
This research has enabled the development of superconducting qubits, which are currently the leading technology platform for quantum computers being built by Google, IBM, and other companies. The applications span cryptography, drug discovery, materials science, and optimisation problems.
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Q: Explain how the 2025 Nobel Physics laureates' work on macroscopic quantum effects enabled the quantum computing revolution.
Answer (50 words):
Clarke pioneered the SQUID for sensitive magnetic measurement. Devoret created the first superconducting qubit as a quantum computer building block. Martinis led Google's 2019 quantum supremacy experiment where Sycamore completed a calculation in 200 seconds that would take a classical supercomputer approximately 10,000 years, demonstrating macroscopic circuits exhibit superposition and entanglement.
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SQUID (Superconducting Quantum Interference Device), pioneered by 2025 Nobel Physics laureate John Clarke, is primarily used for measuring which physical quantity?
Explanation · Correct answer BSQUID (Superconducting Quantum Interference Device), pioneered by John Clarke at UC Berkeley, is one of the most sensitive instruments for measuring magnetic fields. It exploits quantum effects in superconducting circuits and is widely used in medical imaging (magnetoencephalography), geological surveys, and fundamental physics research.
Frequently asked questions
What is a SQUID and who developed it?
A **SQUID** (Superconducting Quantum Interference Device) was pioneered by **John Clarke** — a Nobel Physics 2025 laureate. It is one of the world's most sensitive instruments for measuring **magnetic fields**, used in brain imaging, submarine detection, and fundamental physics.
Who created the first superconducting qubit and what is it called?
**Michel Devoret** created the first superconducting qubit called **quantronium**, a building block for quantum computers. This was a direct product of the macroscopic quantum mechanics work that earned him the **Nobel Prize in Physics 2025**.
What was Google's quantum supremacy experiment in 2019?
Led by **John Martinis**, Google's **Sycamore processor** performed a calculation in **200 seconds** that would take a classical supercomputer approximately **10,000 years** — demonstrating quantum supremacy for the first time in 2019.
How did Nobel Physics 2025 work lead to the quantum computing revolution?
Clarke, Devoret, and Martinis demonstrated that **quantum mechanical effects** (tunnelling, quantised energy levels) occur in macroscopic superconducting circuits. This enabled **superconducting qubits** — the leading platform for quantum computers from Google, IBM and others — with applications in cryptography, drug discovery, and materials science.
What industries will quantum computing based on Nobel Physics 2025 transform?
Quantum computing enabled by Clarke, Devoret, and Martinis' work will transform **cryptography**, **pharmaceutical drug discovery**, **materials science**, **financial modelling**, and **logistics optimisation** — areas where quantum speedups over classical computers are exponential.
