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Demonstration of Blind Quantum Computing

Autor(en)
Stefanie Barz, Elham Kashefi, Anne Broadbent, Joseph Fitzsimons, Anton Zeilinger, Philip Walther
Abstrakt

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(en)
Quantenoptik, Quantennanophysik und Quanteninformation
Externe Organisation(en)
University of Edinburgh, University of Waterloo (UW), National University of Singapore (NUS), Österreichische Akademie der Wissenschaften (ÖAW), University College Dublin
Journal
Science
Band
335
Seiten
303-308
Anzahl der Seiten
6
ISSN
0036-8075
DOI
https://doi.org/10.1126/science.1214707
Publikationsdatum
01-2012
Peer-reviewed
Ja
ÖFOS 2012
103026 Quantenoptik
Schlagwörter
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/ef0c5561-b592-445f-ae7d-c28c9ffff601