American physicist, specialist in quantum information and entanglement. Together with Wojciech Zurek, proved the no-cloning theorem, a fundamental limitation of quantum mechanics. Developed a measure of entanglement — concurrence.
Biography
Born in the USA. Studied at Stanford, received his PhD at the University of California, Berkeley. Worked at Williams College, where he taught until retirement. Collaborated closely with Charles Bennett and other quantum information pioneers.
Key discoveries
No-cloning theorem (1982
together with Zurek)
entanglement measure concurrence (1998)
research on quantum teleportation and quantum computing.
💡 In his free time, he enjoys the history of science and collects rare scientific books.
Quote: "You cannot create a perfect copy of an unknown quantum state — it is simply impossible."
Scientists have proved: purely quantum systems cannot become agents. To make plans and decisions, you need to copy information about the world, and the quantum no-cloning theorem puts an end to such attempts. The mind requires classical 'parts'. This explains how familiar behavior emerges in a quant
The no-cloning theorem says a qubit can't be copied. But physicists found a loophole — encrypted cloning with a one-time key. An experiment on IBM's 154-qubit processor proved the method works under real noise. The real ban is not on copying, but on reading an extra copy.
Scientists have proven the possibility of creating a cipher where two independent interceptors cannot simultaneously reconstruct the original message. The protection relies on fundamental laws of nature and does not depend on computational power.
In quantum cosmology, the Big Bang singularity turns out to be a mirage. Using relational time emerging from entanglement between subsystems of the universe, physicists have shown: the probability of zero volume is strictly zero. The Page-Wootters formalism transforms a static wave function into an