Quantum Physicist John Preskill Explores Information as Fundamental Reality

Quantum computing has the potential to provide insights into profound questions about the universe, such as how space-time emerges from fundamental quantum processes. This capability is particularly valuable because many of these processes are currently beyond our reach with classical computational methods.

The concept of emergent space-time suggests that our classical notions of geometry and locality might break down at quantum scales. Quantum entanglement could underpin the connectivity and structure of space-time itself.

John Preskill, a physicist with a PhD in Quantum Physics and an MBA from Harvard, believes that increased international cooperation would greatly benefit the field of quantum information science. He suggests that public sector support remains crucial for long-term vision and achievements that extend beyond the tech industry’s typical short-term focus.

Companies like Google and IBM are driving investment in quantum computing, with potential applications in chemistry and materials science. However, public investment is necessary to support foundational research that might not have immediate commercial applications but is vital for the field’s long-term health.

Preskill advises young scientists entering the field of quantum information science to seek a broad intellectual foundation in their training, embracing the interdisciplinary spirit that bridges physics, computer science, and engineering.

Firstly, it’s essential to recognize that quantum computers might not provide significant guidance in particle physics for quite some time. Therefore, we should continue progressing with the resources we have, rather than waiting for a breakthrough in quantum computing.

One crucial lesson learned is the importance of interdisciplinary approaches. Quantum information science bridges physics, computer science, and engineering, and it benefits from insights across these domains. This breadth is vital for the future evolution of the field.

In terms of making better qubits, we need advances in materials science to create less noisy qubits. This requires a coordinated effort between companies and governments, as well as public investment in foundational research.

For those entering the field of quantum information science, he advises embracing the interdisciplinary spirit and seeking a broad intellectual foundation in their training. This will equip them to tackle the diverse challenges and opportunities in this field.

Lastly, he shares a personal anecdote about how a sci-fi book inspired him as a young person. The book “The World of Science” sparked my interest in science, particularly theoretical physics, and ultimately led me to become a colleague of legends like Richard Feynman and Murray Gell-Mann at Caltech.

While private investment is accelerating progress, public sector support and international cooperation are crucial for achieving the long-term vision and foundational advancements necessary for this field’s full potential.