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A Provocation from Inside Physics

Lee Billings’s interview with Gerard ’t Hooft turns a deceptively simple complaint into a broad argument about the future of fundamental physics. ’t Hooft is not an outsider taking shots at quantum mechanics. He is a Nobel-winning theorist whose work helped make the Standard Model mathematically coherent and who later proposed the holographic principle, one of the ideas that shaped modern quantum-gravity research. That background makes his impatience with quantum mystery harder to dismiss.

The headline sounds like a rejection of quantum physics, but the argument is subtler. ’t Hooft does not deny that quantum mechanics works. He objects to treating its statistical machinery as the final description of nature. Quantum theory predicts probabilities for what particles will do, and those predictions have survived every serious test. For ’t Hooft, though, that success is not the same as an explanation. A theory that says a particle may scatter this way or that way, with certain odds, still leaves open the deeper question of what physically determines the outcome.

That distinction drives the interview. ’t Hooft sees the current quiet period in particle physics not as a dead end but as a sign that researchers may be asking questions in too familiar a style. The Standard Model’s success has left theorists with few experimental anomalies to chase, and ever larger machines may be too expensive to keep scaling indefinitely. His proposed response is conceptual rather than technological: step backward, reexamine the premises, and look for a more direct account of what elementary objects are and how they interact.

Against Quantum Mysticism

’t Hooft’s sharpest target is the aura of mystery surrounding superposition and nonlocality. He argues that superpositions are mathematical tools, not literal physical states. The famous dead-and-alive cat, in his view, is not a profound feature of reality but a sign that the formalism is being asked to carry more metaphysical weight than it should. He wants a description built from more basic variables, perhaps discrete ones, that would make nature look deterministic underneath the quantum statistics.

This is a controversial stance because quantum mechanics has often been read as forcing a break with classical intuitions. Bell’s theorem and decades of experiments have made simple local hidden-variable theories untenable in the usual framing. But ’t Hooft is trying to preserve locality, the idea that events are governed by what is physically near them rather than by instantaneous influence from afar. For him, abandoning locality would make the laws of nature less intelligible, not more profound.

The interview also applies this skepticism to quantum computing. ’t Hooft accepts that quantum technologies can be powerful and that researchers understand microscopic systems well enough to engineer them. But he disputes the interpretation that superposition is therefore a fundamental ingredient of reality. He thinks quantum computers may be exploiting a successful descriptive layer while still missing the deeper variables beneath it. Their need for error correction, in his telling, points toward the value of a more exact underlying account.

Precision over Wonder

The closing discussion turns to ’t Hooft’s holographic principle, which says that the information in a volume of space may be representable on a lower-dimensional boundary. The idea became central in theoretical physics, but it also helped inspire popular claims that the universe is a simulation or that reality is only information. ’t Hooft is uneasy about that legacy. He wants physics to remove unnecessary mystery, not produce more of it.

The article is compelling because it does not present ’t Hooft as simply right or wrong. Instead it shows a major physicist pushing against a culture of explanation that he thinks has become too comfortable with probability, abstraction and awe. His challenge is not to throw away quantum mechanics but to stop mistaking an extraordinarily accurate formalism for the final word. Whether or not his deterministic hopes succeed, the interview clarifies a live tension at the heart of modern physics: prediction is not always the same thing as understanding.