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John Clauser
2022 Nobel Laureate in Physics | First Experimental Proof of Quantum Entanglement | Co-Creator of the CHSH Inequality | Inventor & Patentee, Quantum Sensing
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The physicist who first proved quantum entanglement is real, John F. Clauser pursued a career-defining experiment that Feynman dismissed and the field ignored, then won the Nobel Prize fifty years later. Co-creator of the CHSH inequality and inventor of patented quantum sensing technologies, he gives audiences a first-person account of the discovery that launched the quantum information revolution, and a rare view of what comes next.
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John Clauser biography
Quantum physics speaker John F. Clauser is the 2022 Nobel Laureate in Physics who pursued an idea that nearly every senior physicist dismissed as a career-ending distraction, and in doing so produced the first experimental proof that quantum entanglement is real. A graduate of Caltech (B.S., 1964) and Columbia University (Ph.D., 1969), Clauser spent most of his career as an independent research physicist at Lawrence Berkeley National Laboratory, Lawrence Livermore National Laboratory, and UC Berkeley. He never held a tenured professorship, yet he reshaped the foundations of modern physics from a sub-basement laboratory with almost no budget.
Nobel physicist speaker John F. Clauser is best known for three interlocking contributions that together triggered the quantum information revolution. In 1969, he co-developed the Clauser-Horne-Shimony-Holt (CHSH) inequality, a rigorous and experimentally testable version of Bell’s theorem that finally gave physicists a practical tool for distinguishing quantum mechanics from classical local hidden-variable theories. In 1972, working with graduate student Stuart Freedman, he carried out the world’s first experimental violation of a Bell inequality, using entangled photon pairs produced by calcium atom decay. Their result, published in Physical Review Letters, was the first direct demonstration that non-local quantum entanglement is a physical reality rather than a philosophical abstraction. In 1974, he and Michael Horne formulated the broader theory of Local Realism.
Inventor, Patentee, and Quantum Sensing Pioneer
The early reception to this work was hostile. Clauser has recounted that Richard Feynman threw him out of his office, and the prevailing advice was to go and do “some real physics.” The Nobel Committee recognized him roughly fifty years after his decisive experiment, one of the longest gaps between discovery and award in the prize’s history. His later career showed the range of a restless experimental mind: he proposed and patented atom interferometers as ultra-sensitive inertial and gravity sensors, invented the Talbot-Lau interferometer, and patented its application to high-resolution X-ray imaging of soft tissue. The Freedman-Clauser experiment has since been replicated hundreds of times and is now standard in undergraduate physics curricula.
As a speaker, John F. Clauser offers something rare: a first-person account of a discovery that changed the course of science, told with the candor of a physicist who chased the truth when no one else would. His talks illuminate the nature of scientific courage, the counterintuitive foundations of quantum mechanics, and what the entanglement revolution means for computing, cryptography, and sensing. For senior audiences weighing the promise and the hype of quantum technology, Clauser supplies both the foundational context and a clear-eyed view of where the real breakthroughs still lie.
John Clauser Speaking Videos
Nobel Prize lecture: John Clauser, Nobel Prize in Physics 2022
Nobel Laureate Dr. John Clauser | Quantum Korea 2023
John Clauser Speaking Topics
Clauser recounts in the first person the long journey from a graduate student's library discovery to a basement experiment that the physics establishment largely dismissed, and that the Nobel Committee ultimately recognized as a founding moment of quantum information science. The talk blends clear scientific explanation with a deeply human story of intellectual conviction, giving audiences both a working understanding of quantum entanglement and a lesson in scientific courage and long-horizon thinking.
Building on his foundational role in establishing entanglement as physical fact, Clauser examines what the quantum revolution means in practice: quantum-secured communications, quantum computing, and ultra-sensitive quantum sensors. He offers a candid, expert assessment of which quantum technologies are genuinely transformative, which are overhyped, and what a realistic path to deployment looks like, invaluable perspective for leaders making technology and investment decisions.
An accessible exploration of the questions at the heart of quantum mechanics. Clauser traces the arc from Einstein's insistence on a deterministic universe, to Bell's mathematical challenge, to his own experiments, showing how physics settled a century-old debate about the nature of reality and what that resolution implies for causality and the limits of classical thinking.
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FAQs on Booking John Clauser
Booking John F. Clauser means putting the physicist who launched the quantum revolution on your stage. As the 2022 Nobel Laureate in Physics, the man who performed the world's first experimental proof of quantum entanglement, and the co-creator of the foundational CHSH inequality, Clauser carries an intellectual authority no secondhand account of quantum technology can match. His story, pursuing a career-threatening idea in a basement lab with no budget, against the advice of legends like Feynman, and being proven right fifty years later, is one of the most compelling narratives in modern science. Contact Aurum Speakers Bureau to check his availability and bring him to your next event.
In 1972, working with graduate student Stuart Freedman at UC Berkeley, Clauser performed the world's first experimental test of a Bell inequality. Using entangled photons produced by excited calcium atoms, they measured correlations between photon polarizations at different angles and found a clear violation of the Bell inequality, a result consistent with quantum mechanics and inconsistent with any theory based on local hidden variables. This was the first direct demonstration that quantum entanglement is a real physical phenomenon. The result, published in Physical Review Letters, has since been replicated hundreds of times.
The Clauser-Horne-Shimony-Holt (CHSH) inequality, developed by Clauser and colleagues in 1969, is the mathematically rigorous, experimentally testable version of Bell's theorem. John Bell had shown in 1964 that quantum mechanics and local hidden-variable theories make different statistical predictions about entangled particles, but his original formulation was not directly testable in the lab. The CHSH paper provided the practical framework that made experimental tests possible. It remains the most cited formulation of Bell's inequalities and is the standard reference for virtually all subsequent experimental tests of quantum mechanics, including those by Aspect and Zeilinger.
As a keynote speaker, John F. Clauser draws on his singular career to address the foundations of quantum mechanics, the experimental proof of entanglement, the history and future of quantum information science, and the strategic implications of quantum computing and cryptography for industry and government. He also speaks to broader themes of scientific discovery and the value of pursuing a minority scientific position against established consensus. His talks are particularly valuable for technology, defense, finance, and policy audiences. Reach out to Aurum Speakers Bureau to explore topics and booking options.
Aurum Speakers Bureau can help you book John Clauser as a speaker for your next event, conference, or board meeting. Simply fill out our contact form to inquire about John Clauser's availability for a speaking engagement. One of our booking agents will respond to your request immediately and contact the speaker to let them know you want to hire them. We will assist you with obtaining speaking fees, booking information, and confirming availability for John Clauser or any other top keynote speaker or celebrity of your choice.
John Clauser speaking fees are determined by several factors, including the event's date, whether it's a virtual or in-person event, the duration, format, preparation required for their speech, and more. The same applies to the cost to hire any other top expert speakers and celebrities. The Speaker Fee Range listed on our website is simply a guideline and is subject to change without notice. If you would like to hire John Clauser to deliver a keynote speech for your event, please fill out the contact form or email us at info@aurumbureau.com with as much detail as possible. One of our experienced agents will get in touch with you and let you know exactly how much it will cost to book John Clauser.
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Yes, John Clauser is available for virtual keynotes and webinars. To book John Clauser for a virtual event, please complete the contact form or send us an email to inquire about the special fees for virtual engagements.
