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