Journal ArticleDOI
A one-way quantum computer.
TLDR
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
Quantum Entanglement Swapping between Two Multipartite Entangled States.
TL;DR: An experimental demonstration of the entanglement swapping between two independent multipartite entangled states, each of which involves a tripartite Greenberger-Horne-Zeilinger (GHZ) entangled state of an optical field, provides a feasible technical reference for constructing more complicated quantum networks.
Journal ArticleDOI
Squeezing and quantum state engineering with Josephson travelling wave amplifiers
TL;DR: In this article, a quantum theory describing the input-output properties of Josephson traveling wave parametric amplifiers is presented. And the authors show how such a device can be used as a source of nonclassical radiation, and how dispersion engineering can be employed to tailor gain profiles and squeezing spectra with attractive properties, ranging from genuinely broadband spectra to squeezing combs.
Journal ArticleDOI
Entanglement stabilization using ancilla-based parity detection and real-time feedback in superconducting circuits
Christian Kraglund Andersen,Ants Remm,Stefania Lazar,Sebastian Krinner,Johannes Heinsoo,Jean-Claude Besse,Mihai Gabureac,Andreas Wallraff,Christopher Eichler +8 more
TL;DR: The ability to stabilize parity over multiple feedback rounds with no further reduction in fidelity provides strong evidence for the feasibility of executing stabilizer codes on timescales much longer than the intrinsic coherence times of the constituent qubits.
Proceedings ArticleDOI
Universal blind quantum computation
TL;DR: In this paper, the authors present a protocol which allows a client to have a server carry out a quantum computation for her such that the client's inputs, outputs and computation remain perfectly private, and where she does not require any quantum computational power or memory.
Journal ArticleDOI
Universal quantum computation using fractal symmetry-protected cluster phases
TL;DR: In this paper, the authors show that two-dimensional fractal subsystem symmetry-protected topological phases may serve as resources for universal measurement-based quantum computation, and they discuss the importance of rigid subsystem symmetries, as opposed to global or global or $(D\ensuremath{-}1)$-form symmetry, in this context.
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.