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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Quantum interference in heterogeneous superconducting-photonic circuits on a silicon chip
TL;DR: A hybrid superconducting-photonic circuit system is developed to show how these elements can be combined in a scalable fashion on a silicon chip for integrated quantum optics by interfering and detecting photon pairs directly on the chip with waveguide-coupled single-photon detectors.
Journal ArticleDOI
Quantum information splitting of an arbitrary three-qubit state by using two four-qubit cluster states
TL;DR: It is demonstrated that two four-qubit cluster states can be used to realize the deterministic QIS of an arbitrary three-qu bit state by performing only the Bell-state measurements.
Journal ArticleDOI
Non-Markovian reduced dynamics and entanglement evolution of two coupled spins in a quantum spin environment
TL;DR: In this paper, the exact quantum dynamics of the reduced density matrix of two coupled spin qubits in a quantum Heisenberg XY spin star environment in the thermodynamic limit at arbitrarily finite temperatures is obtained using a novel operator technique.
Journal ArticleDOI
Generating a four-photon polarization-entangled cluster state
XuBo Zou,Wolfgang Mathis +1 more
TL;DR: In this paper, the authors proposed a scheme to generate a four-photon polarization-entangled cluster state by using linear optical elements and fourphoton coincidence detection using spontaneous parametric downconversion as photon resources.
Journal ArticleDOI
All Maximally Entangled Four Qubits States
Gilad Gour,Nolan R. Wallach +1 more
TL;DR: In this paper, an operational interpretation for the 4-tangle as a type of residual entanglement, similar to the interpretation of the 3-tangles, was proposed and the class of maximally entangled four-qubits states was characterized by four real parameters.
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.