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
Quantum Metrology beyond the Classical Limit under the Effect of Dephasing.
Yuichiro Matsuzaki,Simon C. Benjamin,Shojun Nakayama,Shiro Saito,William J. Munro,William J. Munro +5 more
TL;DR: This work proposes a scheme that estimates the amplitude of globally applied fields with the uncertainty of 1/T for an arbitrary time scale under the effect of dephasing and uses one-way quantum-computing-based teleportation between qubits to prevent any increase in the correlation between the quantum state and its local environment from building up.
Journal ArticleDOI
QDENSITY—A Mathematica Quantum Computer simulation
TL;DR: This Mathematica 6.0 package is a simulation of a Quantum Computer that provides a modular, instructive approach for generating the basic elements that make up a quantum circuit using the density matrix.
Journal ArticleDOI
A bright future for quantum communications
Timothy C. Ralph,Ping Koy Lam +1 more
TL;DR: In this article, the authors proposed a quantum information protocol based on continuous variable entangled states (CVES) which exploits standard optical modulation and measurement equipment, and does not require single photons.
Posted Content
Blind quantum computing with two almost identical states
Vedran Dunjko,Elham Kashefi +1 more
TL;DR: This work identifies sufficient criteria on the powers of the client, which still allow for secure blind quantum computation, in a universally composable framework, and provides a series of protocols, where each step reduces the number of differing states the client needs to be able to prepare.
Journal ArticleDOI
Graph States as a Resource for Quantum Metrology.
Nathan Shettell,Damian Markham +1 more
TL;DR: In this paper, the authors investigated the practicality of graph states for quantum metrology and showed that graph states are a natural resource for much of quantum information, and here they characterize their quantum Fisher information for an arbitrary graph state.
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.