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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A quantum machine learning algorithm based on generative models.
TL;DR: A general quantum algorithm for machine learning based on a quantum generative model that is more capable of representing probability distributions compared with classical generative models and has exponential speedup in learning and inference at least for some instances if a quantum computer cannot be efficiently simulated classically.
Journal ArticleDOI
Verifying multipartite entangled Greenberger-Horne-Zeilinger states via multiple quantum coherences
K. X. Wei,Isaac Lauer,Srikanth Srinivasan,Neereja Sundaresan,Douglas McClure,D.M. Toyli,David McKay,Jay M. Gambetta,Sarah Sheldon +8 more
TL;DR: In this article, an 18-qubit GHZ state with multipartite entanglement was prepared and measured on a 20qubit device, based on measuring multiple quantum coherences, which is robust to noise and only requires measuring the population in the ground state.
Journal ArticleDOI
Quantum computation by measurements
TL;DR: In this article, the universality of 4-qubit unitary gates has been proved for a simple discrete set of 2-qubits, using a scheme simplifying the initial construction.
Journal ArticleDOI
Dense coding and teleportation with one-dimensional cluster states
TL;DR: In this paper, an optimal dense coding protocol with genuine multipartite entangled states, one-dimensional cluster states, is presented, which can also be used to implement controlled quantum communication.
Journal ArticleDOI
Experimental verification of multipartite entanglement in quantum networks.
Will McCutcheon,Anna Pappa,Bryn Bell,Alex McMillan,André Chailloux,T. Lawson,Mhlambululi Mafu,Damian Markham,Eleni Diamanti,Iordanis Kerenidis,J. G. Rarity,Mark Tame +11 more
TL;DR: A protocol is designed and experimentally demonstrated that allows any party in a network to check if a source is distributing a genuinely multipartite entangled state, even in the presence of untrusted parties, and remains secure against dishonest behaviour of the source and other parties.
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.