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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Multipartite quantum correlation and entanglement in four-qubit pure states
Yan-Kui Bai,Dong Yang,Zheng Wang +2 more
TL;DR: Based on the quantitative complementarity relations, the authors analyzed thoroughly the properties of multipartite quantum correlation and entanglement in four-qubit pure states, and found that the single residual correlation and the genuine correlations of three and four qubits are unable to quantify entagglement appropriately.
Journal ArticleDOI
Analysis of entanglement measures and LOCC maximized quantum fisher information of general two qubit systems
TL;DR: This work revisits the state ordering problem of general two qubit states and calculates the maximized quantum Fisher information (QFI), showing that there are pairs of states having equal maximized QFI but different values for concurrence, REE and negativity and vice versa.
Journal ArticleDOI
Dangling-bond charge qubit on a silicon surface
Lucian Livadaru,Lucian Livadaru,Peng Xue,Peng Xue,Zahra Shaterzadeh-Yazdi,Gino A. DiLabio,Josh Mutus,Jason L. Pitters,Barry C. Sanders,Robert A. Wolkow,Robert A. Wolkow +10 more
TL;DR: In this paper, two closely spaced dangling bonds positioned on a silicon surface and sharing an excess electron are revealed to be a strong candidate for a charge qubit, based on a study of the coherent dynamics of this qubit.
Journal ArticleDOI
Continuous-variable gate teleportation and bosonic-code error correction
Blayney W. Walshe,Ben Q. Baragiola,Rafael N. Alexander,Rafael N. Alexander,Nicolas C. Menicucci +4 more
TL;DR: In this article, a continuous-variable gate teleportation using entangled states made from pure product states sent through a beam splitter is presented, which can be used to realize non-Gaussian, nonunitary quantum operations on an input state.
Journal ArticleDOI
Concatenated tensor network states
TL;DR: It is shown that the corresponding concatenated tensor network states can efficiently describe time evolution and possess arbitrary block-wise entanglement and long-ranged correlations, and the possibility of efficiently extracting information from these states is investigated.
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.