Demonstration of Blind Quantum Computing

By Stefanie Barz, Elham Kashefi, Anne Broadbent, Joseph Francis Fitzsimons, Anton Zeilinger, Philip Walther. Science, 2011

467 citations recorded by the source corpus.

Quantum Blindness While quantum computers offer speed advantages over their classical counterparts, the technological challenges facing their eventual realization suggest that they will need to be located in specialized facilities. Thus, interaction would then need to be on a quantum client:quantum server basis. Barz et al. (p. 303; see the Perspective by Vedral) implemented a proof-of-principle protocol that illustrates complete security in such a setup—for both the client and the server. In this blind quantum computing protocol, the client maintains the security of their data and the specifics of the calculation they want to perform, and the server cannot access the data or calculation of the client. A protocol is implemented that can ensure secure client-server interactions on a quantum computer architecture. 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.

Subfields: Artificial Intelligence

View Paper: https://www.semanticscholar.org/paper/da7ab9e7a904fcb13d5bd91017ae03b88dfa67b6

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Artificial Intelligence

Citations in the corpus

Experimental photonic quantum memristor (2021, background): “[25] Stefanie Barz, Elham Kashefi, Anne Broadbent, Joseph F Fitzsimons, Anton Zeilinger, and Philip Walther, “Demonstration of blind quantum computing,” science 335, 303–308 (2012).”
Frequency-domain Hong–Ou–Mandel interference (2016, background): “In the past three decades since the HOM interference has been proposed and demonstrated with two photons from spontaneous parametric down-conversion (SPDC) process [1], a huge varieties of experiments based on the HOM interference revealed fundamental properties in quantum physics, especially in qua”
NetSquid, a NETwork Simulator for QUantum Information using Discrete events (2020, background): “Apart from quantum key distribution (QKD) 45 – 49 and a few select applications 50 – 53 , little is known about the requirements of quantum applications 5 on imperfect hardware.”
Quantum computing: A taxonomy, systematic review and future directions (2020, background): “An unconditional secure quantum cloud computing can be a major ingredient to various real-life applications if powerful quantum computers will become widely available in future [252].”
Quantum internet: A vision for the road ahead (2018, background): “Initial results for blind quantum computation indicates that this might indeed be the case (47).”
Large-scale silicon quantum photonics implementing arbitrary two-qubit processing (2018, background): “[14] Stefanie Barz, Elham Kashefi, Anne Broadbent, Joseph F Fitzsimons, Anton Zeilinger, and Philip Walther.”
Private quantum computation: an introduction to blind quantum computing and related protocols (2016, methodology): “performed a successful demonstration of the UBQC protocol using a four qubit resource state entangled according to a variety of graphs, corresponding to subgraphs of the brickwork state.(81) The reported experiments blindly implemented both the Deutsch–Josza algorithm(82) and Grover’s search algorit”
Quantum Computation and Quantum Information (2012, background): “…in recent years, and quantum computers of a handful of qubits and basic quantum communication devices have been built in research laboratories (see Barz et al. (2012); Clarke and Wilhelm (2008); DiCarlo et al. (2009); Johnson et al. (2011); Lee et al. (2011); Neumann et al. (2008)), but there are…”