Journal ArticleDOI
A one-way quantum computer.
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A scheme of quantum computation that consists entirely of one-qubit measurements on a particular class of entangled states, the cluster states, which are thus one-way quantum computers and the measurements form the program.Abstract:
We present a scheme of quantum computation that consists entirely of one-qubit measurements on a particular class of entangled states, the cluster states. The measurements are used to imprint a quantum logic circuit on the state, thereby destroying its entanglement at the same time. Cluster states are thus one-way quantum computers and the measurements form the program.read more
Citations
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Journal ArticleDOI
Materials science: qubits in the pink.
Pieter Kok,Brendon W. Lovett +1 more
TL;DR: Crystal imperfections known as nitrogen–vacancy defects give some diamonds a characteristic pink colour, and these defects might have rosy prospects as the 'qubits' of a quantum computer.
Journal ArticleDOI
Multi-walker discrete time quantum walks on arbitrary graphs, their properties and their photonic implementation
Peter P. Rohde,Peter P. Rohde,Andreas Schreiber,M. Štefaňák,Igor Jex,Christine Silberhorn,Christine Silberhorn +6 more
TL;DR: In this article, the authors discuss generalizing the model of discrete time quantum walks to the case of an arbitrary number of walkers acting on arbitrary graph structures and present a formalism that allows for the analysis of such situations.
Posted ContentDOI
Contextuality, Cohomology and Paradox
TL;DR: A remarkable connection between contexuality and logical paradoxes is exposed and it is shown that "All-vs-Nothing" proofs of contextuality are witnessed by cohomological obstructions.
Journal ArticleDOI
Experimental violation of multipartite Bell inequalities with trapped ions.
B. P. Lanyon,M. Zwerger,Petar Jurcevic,Cornelius Hempel,Wolfgang Dür,Hans J. Briegel,Rainer Blatt,Christian F. Roos +7 more
TL;DR: This work considers resource states for measurement-based quantum computation of between 3 and 7 ions and shows that all strongly violate a Bell-type inequality for graph states, where the criterion for violation is a sufficiently high fidelity.
Journal ArticleDOI
The one-way quantum computer - a non-network model of quantum computation
TL;DR: In this paper, two examples of the non-network character of the QC C are given: first, circuits in the Clifford group can be performed in a single time step, and the bit-reversal gate has no network interpretation.
References
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Journal ArticleDOI
Elementary gates for quantum computation.
Adriano Barenco,Charles H. Bennett,Richard Cleve,David P. DiVincenzo,Norman Margolus,Peter W. Shor,Tycho Sleator,John A. Smolin,Harald Weinfurter +8 more
TL;DR: U(2) gates are derived, which derive upper and lower bounds on the exact number of elementary gates required to build up a variety of two- and three-bit quantum gates, the asymptotic number required for n-bit Deutsch-Toffoli gates, and make some observations about the number of unitary operations on arbitrarily many bits.
Journal ArticleDOI
Quantum information and computation
TL;DR: In information processing, as in physics, the classical world view provides an incomplete approximation to an underlying quantum reality that can be harnessed to break codes, create unbreakable codes, and speed up otherwise intractable computations.
Journal ArticleDOI
Good quantum error-correcting codes exist
A. R. Calderbank,Peter W. Shor +1 more
TL;DR: The techniques investigated in this paper can be extended so as to reduce the accuracy required for factorization of numbers large enough to be difficult on conventional computers appears to be closer to one part in billions.
Journal ArticleDOI
Error Correcting Codes in Quantum Theory.
TL;DR: It is shown that a pair of states which are, in a certain sense, “macroscopically different,” can form a superposition in which the interference phase between the two parts is measurable, providing a highly stabilized “Schrodinger cat” state.
Journal ArticleDOI
Demonstrating the viability of universal quantum computation using teleportation and single-qubit operations
TL;DR: It is shown that single quantum bit operations, Bell-basis measurements and certain entangled quantum states such as Greenberger–Horne–Zeilinger (GHZ) states are sufficient to construct a universal quantum computer.