| John Preskill | |
|---|---|
| Name | John Preskill |
| Birth date | 1953 |
| Birth place | Chicago, Illinois, United States |
| Nationality | American |
| Fields | Theoretical physics, Quantum information science, High-energy physics |
| Workplaces | California Institute of Technology, Institute for Quantum Information and Matter |
| Alma mater | Princeton University, Harvard University |
| Doctoral advisor | Murray Gell-Mann |
| Known for | Quantum error correction, Topological quantum computation, Quantum supremacy discussions |
John Preskill
John Preskill is an American theoretical physicist noted for foundational work bridging quantum mechanics and computer science within the broader field of quantum information science. He is a prominent figure at the California Institute of Technology where his research has shaped contemporary approaches to quantum computing, quantum error correction, and the interface between quantum gravity and information theory. Preskill's influence extends through research, mentorship, and public engagement on topics such as topological quantum computation and the theoretical limits of quantum devices.
John Preskill was born in Chicago, Illinois in 1953 and demonstrated early aptitude in mathematics and physics. He completed undergraduate studies at Swarthmore College (B.A.) and pursued graduate work at Princeton University, receiving his Ph.D. under the supervision of Murray Gell-Mann in high-energy physics and quantum field theory. His doctoral thesis and early postdoctoral research engaged with topics in particle physics and the emerging problems that later connected to information-theoretic perspectives on quantum systems. During this period he interacted with researchers at institutions such as CERN and SLAC National Accelerator Laboratory, grounding his training in both formal theory and collaborative experimental contexts.
Preskill joined the faculty of the California Institute of Technology (Caltech) in the early 1980s, where he has held positions in the Division of Physics, Mathematics and Astronomy. He founded and directs initiatives linking physics and computation, most notably the Institute for Quantum Information and Matter (IQIM) at Caltech, which fostered collaborations among theorists and experimentalists working on superconducting qubits, trapped ions, and topological phases of matter. Preskill has held visiting appointments at institutions including Institute for Advanced Study, Harvard University, and collaborations with groups at IBM Quantum, Google Quantum AI, and national laboratories such as Oak Ridge National Laboratory and Los Alamos National Laboratory. He has supervised numerous graduate students and postdoctoral researchers who have gone on to roles in academia, industry, and national labs.
Preskill is regarded as a founding architect of modern quantum information theory. He coined and popularized the term "quantum information" in the context of quantum many-body systems and computation, and authored influential lecture notes and review articles used widely in graduate education. His work connects principles from Shor's algorithm and Peter Shor's breakthroughs to theoretical limits on quantum processors, informing experimental efforts at companies such as D-Wave Systems and IonQ. Preskill participated in debates over quantum supremacy proposals, offering rigorous criteria and promoting benchmarks that led to experiments by Google and IBM testing quantum advantage. He has written on entanglement entropy, complexity measures such as quantum circuit complexity, and their implications for both condensed matter systems and computational models like the quantum Turing machine and adiabatic quantum computation.
A central area of Preskill's research is quantum error correction (QEC) and fault-tolerant architectures for scalable quantum computers. He worked on theoretical frameworks for stabilizer codes and promoted the importance of surface code architectures for practical fault tolerance in systems built from superconducting qubits and topological qubits. Preskill analyzed threshold theorems and resource overheads needed to achieve logical qubits robust to decoherence, interacting with researchers such as Peter Shor, Daniel Gottesman, and Alexei Kitaev. His group's papers addressed error models, decoding algorithms, and hardware-relevant constraints, influencing experimental programs at Caltech, Microsoft Station Q, and industrial laboratories pursuing error-corrected quantum processors.
Preskill has contributed to cross-disciplinary research linking quantum gravity and holographic principle ideas to quantum information. He participated in the dialogue around the AdS/CFT correspondence and the role of entanglement in reconstructing spacetime geometry, engaging with researchers like Juan Maldacena and Leonard Susskind. Preskill explored conceptual issues such as the black hole information paradox, complementarity, and the quantum computational complexity of state reconstruction, connecting to concepts including the firewall paradox and proposals for ER=EPR. His perspective emphasizes rigorous, conservative interpretation of quantum foundations while advocating for frameworks that preserve unitarity and consistency with established quantum field theory.
Preskill's accomplishments have been recognized by multiple honors, including election to the National Academy of Sciences and fellowships in professional societies such as the American Physical Society. He has received invited plenary lectures at conferences including the International Congress on Mathematical Physics and the QIP (Quantum Information Processing) conference, and prizes acknowledging contributions to theoretical physics and quantum information. Beyond research, Preskill served on advisory panels for agencies like the National Science Foundation and the Department of Energy, participated in program committees for conferences, and helped shape national research priorities in quantum technology through engagement with initiatives such as the National Quantum Initiative.
Category:American physicists Category:Quantum information scientists Category:California Institute of Technology faculty