A quantum theorist whose proposals helped turn trapped ions into a computing architecture and entanglement purification into a strategy for long-distance quantum communication.
Max Planck Institute of Quantum OpticsPhysical Review LettersarXivCirac’s contributions connect the abstract requirements of quantum information with specific physical systems. His trapped-ion proposal with Peter Zoller described how laser-controlled ions could perform quantum computation. His work with Briegel, Dür and Zoller then addressed the different challenge of preserving entanglement across long communication distances. Both examples show why architecture matters: a useful quantum device needs a method for combining imperfect physical operations into a larger, coordinated task.
Max Planck Institute of Quantum OpticsPhysical Review LettersarXivDefining contributions
Work, in context- 1995
A trapped-ion computing architecture
Cirac and Peter Zoller proposed quantum computation with cold ions held in a linear trap. Their scheme used laser interactions and shared quantized motion to connect individually controlled ions, providing a concrete architecture for quantum logic.
Joint author of the trapped-ion computing proposal with Peter Zoller.
Source-supported recordPhysical Review Letters - 1998
Quantum repeaters
With Hans-Jürgen Briegel, Wolfgang Dür and Peter Zoller, Cirac proposed a nested entanglement-purification approach to quantum repeaters. It addressed the accumulation of noise that obstructs direct distribution of entanglement over long communication channels.
Coauthor of the repeater proposal with Hans-Jürgen Briegel, Wolfgang Dür and Peter Zoller.
Source-supported recordarXiv
Follow the evidence
3 sourcesPrimary papers, institutional records and attributed announcements. Each source supports the claims linked above.
- Max Planck Institute of Quantum Opticsinstitutional biography
Ignacio Cirac
Director since 2001 and research identification.
Checked 2026-09-19 - Physical Review Lettersprimary research
Quantum Computations with Cold Trapped Ions
Cirac–Zoller proposal, trapped ions, laser control and shared motion.
Published 1995-05-15 · Checked 2026-09-19 - arXivprimary research
Quantum repeaters for communication
Authors and nested purification repeater proposal.
Published 1998-03-20 · Checked 2026-09-19