She was 18 when she questioned quantum computing’s big promise, Ewin Tang’s breakthrough changed how scie - The Times of India

The world of quantum computing has long been driven by an extraordinary promise: that machines operating according to the laws of quantum physics could one day solve problems that would overwhelm even the most powerful conventional computers.Then came Ewin Tang.At just 18, while studying at the University of Texas at Austin, Tang produced research that forced the scientific community to take a closer look at one of quantum computing's most celebrated claims. Her work demonstrated that conventional computers could sometimes perform far better than expected, even on problems believed to offer a significant quantum advantage.The teenager who questioned a quantum breakthroughIn 2018, Tang was an undergraduate student working under the guidance of computer scientist Scott Aaronson. She focused on a quantum algorithm designed for recommendation systems, the kind of technology used to identify preferences and suggest relevant products, films, or other content.The quantum algorithm was considered an important example of how quantum computers could potentially outperform classical machines.Tang's research, however, produced a surprising result.She designed a classical algorithm that could solve the same problem nearly as efficiently as the quantum version. Her work suggested that the dramatic gap between quantum and classical computing, at least in this case, was not as wide as researchers had believed. For an 18-year-old undergraduate, the finding was nothing short of remarkable.Redrawing the line between quantum and classical computingTang's work did not argue that quantum computers were unnecessary. Instead, it raised a far more important question: when do quantum computers genuinely provide an advantage?Her research helped establish a new direction known as “dequantization,” finding classical algorithms that can perform tasks previously believed to require quantum computing.She later extended this line of inquiry to other areas of machine learning and linear algebra. In doing so, Tang and other researchers demonstrated that some claimed quantum speedups depended heavily on the assumptions made about how information was stored, accessed and processed.The message was clear: before declaring victory for quantum computing, researchers needed to make sure classical algorithms had not been underestimated.From undergraduate researcher to global recognitionTang's early work was only the beginning. She later earned her PhD from the University of Washington and continued investigating the boundaries between quantum and classical computation. Her contributions have earned her recognition as one of the leading young researchers working at the intersection of mathematics, computer science, and quantum information.Her achievements include recognition in Forbes’ 30 Under 30 and the prestigious 2025 Maryam Mirzakhani New Frontiers Prize.Today, Tang is a Miller Fellow at the University of California, Berkeley, and is set to begin her next chapter as a professor at Princeton University.A bigger lesson beyond quantum computingEwin Tang's story is ultimately about more than algorithms and machines.It is about intellectual courage, the willingness to question an exciting idea rather than simply accept it. At an age when many students are still deciding what they want to study, Tang was already challenging assumptions at the frontier of modern computing.Her research did not close the door on quantum computers. Instead, it made the search for genuine quantum advantage more rigorous.And perhaps that is her most important contribution: reminding science that progress does not always come from proving that the future is extraordinary. Sometimes, it comes from discovering that the present still has a few surprises left.Disclaimer: This article is based on publicly available information about Ewin Tang's academic research, career, and awards. Scientific interpretations and research findings may evolve as new studies and computational developments emerge.Get the latest Education News and Live updates. Download the TOI app.