An Interview with the Winner of the 2025 Nobel Prize in Physics, John Martinis
Quick Read
Summary
Takeaways
- ❖Martinis' Nobel-winning work showed that quantum mechanics governs macroscopic electric circuits, not just microscopic particles.
- ❖A qubit can exist as both 0 and 1 simultaneously, enabling parallel computations that scale exponentially (e.g., 53 qubits = 10^16 states).
- ❖Quantum tunneling, a key phenomenon, involves borrowing energy for a tiny duration (Planck's constant) to cross a barrier.
- ❖Martinis' post-doc research demonstrated that quantum tunneling has a measurable 'traversal time,' challenging the long-held instantaneous view.
- ❖Quantum computers are expected to function as co-processors to supercomputers, not as standalone, portable devices in the near future.
- ❖The development of quantum computing will require new 'quantum-safe' cryptographic systems, as existing ones like RSA will become vulnerable.
- ❖Cold traps in lunar craters are proposed as ideal locations for future quantum data centers due to their consistently low temperatures.
Insights
1Macroscopic Quantum Tunneling Enables Quantum Devices
John Martinis' Nobel Prize-winning discovery demonstrated that electric circuits, which are macroscopic objects (chip size of a dime), can obey quantum mechanics, specifically macroscopic quantum mechanical tunneling and energy quantization. This opened the door to building electronic devices that harness quantum behavior, creating a 'new periodic table' of quantum components like inductors, capacitors, and Josephson junctions.
We saw an electric circuit where... it's obeying quantum mechanics... we showed that for electrical circuit, which the chip is about... the size of a dime or so, it's... quite big, it's the current and voltages of that that obey... quantum mechanics. []
2Quantum Tunneling is Not Instantaneous
Contrary to a widely held belief in physics, quantum tunneling does not occur instantaneously. Martinis' post-doctoral research in 1987-88 showed that particles take a measurable 'tunneling traversal time' to cross a barrier. This finding, though not widely published initially, has implications for understanding tunneling phenomena in complex systems.
No, no, the Actually, this is new physics that we did on that th- when I did in my post-doc. It takes a little bit of time for it to tunnel. It does? Oh! This is not actually well known. This is an experiment we did a long time ago. Unfortunately, we didn't publish it at a gr- in a good journal, so no one knows about it, but I get to talk about it in my Nobel lecture so that people know about it... I call it the, the tunneling traversal time, okay- which I think is a pretty good word. That's what I use. []
3Qubits Enable Exponential Parallel Computation
A qubit, unlike a classical bit, can exist in a superposition of both 0 and 1 simultaneously. This allows quantum computers to perform computations on all possible states in parallel. The computational power scales exponentially: 53 qubits process 10^16 states, and 100 qubits exceed the number of atoms in the universe in terms of parallel states.
What a qubit is, is a bit that's made out of a quantum computer, and the q- the laws of quantum mechanics can say that it can be both a zero and a one at the same time... you get the answer for the 0 state and you get the answer for the one state, and you did all that in parallel... By the time you get up to 53 qubits, which is what we did at Google, that's 10 to the 16 states in parallel... by the time you get to, you know, 100, that's a number bigger than there are atoms in the universe. []
4Quantum Computing's Impact on Cryptography
The advent of quantum computers, particularly with algorithms like Peter Shor's, poses a significant threat to current encryption standards like RSA. While this doesn't mean all encryption will be impossible, it necessitates a transition to 'quantum-safe crypto' algorithms, which are already under development and analysis by agencies like NIST.
This was the big algorithm in 1990s by Peter Shor saying that in potential you can do that, which was a big thing. And people are now building quantum computers where I can m- I can kind of see in the not so distant future that you may be able to break what's called RSA... All cryptography systems have a finite lifetime... people have to switch over to something what's called, uh, crypto-safe, uh, well, excuse me, quantum-safe crypto. []
5Quantum Supremacy vs. Quantum Advantage
The term 'quantum supremacy' refers to a quantum computer performing a task that a classical supercomputer cannot accomplish in a reasonable timeframe. While the term itself has been debated (some prefer 'quantum advantage'), the 2019 Google experiment demonstrated this by solving a complex mathematical problem far faster than any classical machine, marking a significant milestone in the field.
This was a nice term, uh, developed by a theorist proposing it, and then we did an experiment. It's basically showing that we could do with a quantum computer something that would take way longer for a regular computer, a, a big data center, okay? And that's what we did in 2019... Some people call it a quantum advantage. []
Bottom Line
The 'tunneling traversal time' discovery, though not widely published, will be a key point in Martinis' Nobel lecture, suggesting a significant re-evaluation of a fundamental quantum concept.
This highlights that even foundational physics can have overlooked nuances, and new discoveries can emerge from revisiting old assumptions. It could impact future quantum device design where precise timing is critical.
Researchers could explore how this traversal time influences the behavior of complex quantum systems and potentially engineer new devices that exploit or mitigate this delay.
Quantum computers are envisioned as co-processors to supercomputers, rather than standalone, ubiquitous devices.
This clarifies the practical integration model for quantum computing, suggesting that it will augment, not entirely replace, classical computing infrastructure. It implies a hybrid computational future.
Develop specialized interfaces and software frameworks that efficiently offload quantum-specific problems to quantum co-processors while leveraging classical supercomputers for general tasks.
Cold traps in lunar craters, where the sun never shines, are ideal locations for quantum data centers due to consistently low temperatures.
Achieving extremely low temperatures is crucial for maintaining quantum coherence. Utilizing natural extraterrestrial environments could offer a stable, energy-efficient solution for large-scale quantum infrastructure, overcoming terrestrial cooling challenges.
Investigate the engineering and logistical challenges of establishing and maintaining quantum computing facilities in extreme extraterrestrial environments, potentially leading to new space-based technology sectors.
Opportunities
Develop Quantum-Safe Cryptography Solutions
Create and implement new encryption algorithms and systems that are resistant to attacks from quantum computers, addressing the finite lifetime of current cryptographic standards like RSA. This includes software, hardware, and consulting services for transition.
Quantum Computing as a Service (QCaaS)
Offer remote access to quantum computing resources as a co-processor to existing supercomputers and AI models. This would allow enterprises and researchers to leverage quantum capabilities without the immense cost and complexity of owning and operating their own quantum hardware.
Specialized Quantum Algorithm Development for Industry
Focus on creating and optimizing quantum algorithms for specific, high-value industrial applications beyond encryption, such as drug discovery, materials science, financial modeling, or complex system simulations (e.g., weather prediction).
Key Concepts
Macroscopic Quantum Phenomena
The idea that quantum mechanical laws, typically associated with microscopic particles, can manifest and be observed in larger, macroscopic systems, as demonstrated by crystal growth or superconducting circuits. This allows for the engineering of quantum devices.
Quantum Parallelism
The ability of qubits, due to superposition, to process multiple states (0 and 1 simultaneously) in parallel. This exponential scaling allows quantum computers to perform calculations on a vast number of possibilities concurrently, far exceeding classical computers for specific problems.
Lessons
- For long-term data security, begin exploring and planning the transition to quantum-safe cryptographic systems, as current standards like RSA have a finite lifespan.
- Monitor advancements in quantum computing for specific applications relevant to your industry, particularly in areas requiring complex simulations or optimization (e.g., materials science, drug discovery, financial modeling).
- Encourage education and research in physics and engineering, as these fields are fundamental to developing and applying future technologies like quantum computing and AI.
Notable Moments
The Nobel Committee's 'slow reading' of 40-year-old research.
Highlights the long gestation period for fundamental scientific discoveries to be recognized for their profound impact, often waiting until their practical applications (like quantum computing) become evident. It also touches on the rule that Nobel Prizes cannot be awarded posthumously, adding a layer of irony to the delay.
Martinis' unpublished post-doc discovery about tunneling time.
Reveals that even groundbreaking findings can remain obscure due to publication choices or word-smithing debates, only to gain prominence later, especially when the discoverer becomes a Nobel laureate. It underscores the importance of proper dissemination of scientific results.
Discussion on regulating quantum computing, similar to AI or atomic energy.
Acknowledges the profound societal impacts of advanced technologies and the need for proactive governance. Martinis suggests learning from current AI regulation models, indicating a growing awareness within the scientific community about ethical and control considerations for emerging tech.
The concept of quantum computers operating from cold traps on the moon.
Illustrates the extreme engineering challenges and creative solutions required for quantum computing. The need for ultra-cold environments could drive future extraterrestrial infrastructure development for advanced computational needs.
Quotes
"By the time you get up to 53 qubits, that's 10 to the 16th states in parallel. And by the time you get to, you know, 100, that's a number bigger than there are atoms in the universe. You can become God."
"A lot of times the You don't know if physics is important until you see what it develops into."
"It takes a little bit of time for it to tunnel. It does? Oh! This is not actually well known."
"All cryptography systems have a finite lifetime. So this RSA, what people are using right now, it's been around for many decades now, but we're thinking because the quantum computers are nearing the end of life."
"I am really trying to accelerate the development of quantum computers. So it happens in your lifetime? So it'll happen before I die, okay, so."
"I think you want to think about a quantum computer as a co-processor to a supercomputer, you know, with the GPUs and language models."
Q&A
Recent Questions
Related Episodes
PBS News Hour full episode, April 10, 2026
"This episode covers high-stakes US-Iran peace talks amidst ongoing conflict, Hungary's pivotal election challenging Viktor Orban, the accelerating decline in US birth rates, AI's disruptive impact on jobs, and Palestinian Christians observing Easter under Israeli restrictions."
LIVE: INSTANT FALLOUT from Trump-Iran ‘CEASEFIRE’…
"The hosts dissect the immediate fallout of the Trump-Iran 'ceasefire,' revealing significant US losses, a fractured MAGA world, and a growing progressive debate over extreme rhetoric."
Pierre Poilievre: The Economy Is About to Collapse! America Is Making a Huge Mistake!
"Canadian opposition leader Pierre Poilievre argues that government overreach, monetary inflation, and a misguided US foreign policy are driving Western economies towards collapse, advocating for free markets, resource liberation, and individual freedom as the path to prosperity."
UNDER SURVEILLANCE | ENGLISH MAJORS | SEASON 3 | EP 11
"The 85 South crew hilariously dissects the pervasive surveillance state, the dangers of AI, and the evolving landscape of social media and entertainment, all while promoting their own 'grifting' ventures."