Demonstration of Blind Quantum Computing
- Author(s)
- Stefanie Barz, Elham Kashefi, Anne Broadbent, Joseph Fitzsimons, Anton Zeilinger, Philip Walther
- Abstract
Quantum computers, besides offering substantial computational speedups, are also expected to preserve the privacy of a computation. We present an experimental demonstration of blind quantum computing in which the input, computation, and output all remain unknown to the computer. We exploit the conceptual framework of measurement-based quantum computation that enables a client to delegate a computation to a quantum server. Various blind delegated computations, including one- and two-qubit gates and the Deutsch and Grover quantum algorithms, are demonstrated. The client only needs to be able to prepare and transmit individual photonic qubits. Our demonstration is crucial for unconditionally secure quantum cloud computing and might become a key ingredient for real-life applications, especially when considering the challenges of making powerful quantum computers widely available.
- Organisation(s)
- Quantum Optics, Quantum Nanophysics and Quantum Information
- External organisation(s)
- University of Edinburgh, University of Waterloo (UW), National University of Singapore (NUS), Österreichische Akademie der Wissenschaften (ÖAW), University College Dublin
- Journal
- Science
- Volume
- 335
- Pages
- 303-308
- No. of pages
- 6
- ISSN
- 0036-8075
- DOI
- https://doi.org/10.1126/science.1214707
- Publication date
- 01-2012
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103026 Quantum optics
- Keywords
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/ef0c5561-b592-445f-ae7d-c28c9ffff601