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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Time Asymptotics and Entanglement Generation of Clifford Quantum Cellular Automata
TL;DR: This work identifies invariant states and study convergence properties of classes of states, such as quasifree and stabilizer states, and considers the generation of entanglement analytically and numerically for stabilizer and quasIFree states.
Journal ArticleDOI
On-demand photonic entanglement synthesizer
TL;DR: In this paper, an on-demand entanglement synthesizer that programmably generates all these entangled states from a single squeezed light source is presented, which is achieved by a loopbased circuit that is dynamically controllable at nanosecond time scales and processes optical pulses in the time domain.
Journal ArticleDOI
Proposal for Quantum Simulation via All-Optically-Generated Tensor Network States.
Ish Dhand,M. Engelkemeier,Linda Sansoni,Sonja Barkhofen,Christine Silberhorn,Martin B. Plenio +5 more
TL;DR: In this paper, a nonlinear down-conversion process in an optical loop is employed to generate one-and higher-dimensional tensor network states of light, which are then used to simulate the ground-state physics of many-body systems.
Journal ArticleDOI
Effects of spectral entanglement in polarization-entanglement swapping and type-I fusion gates
Travis S. Humble,Warren P. Grice +1 more
TL;DR: In this article, the authors examine how spectral entanglement in polarization-entangled photon states generated from bulk-crystal, spontaneous parametric down-conversion affects the success of swapping and type-I fusion gates.
Journal ArticleDOI
Theory of remote entanglement via quantum-limited phase-preserving amplification
TL;DR: In this paper, the authors proposed concurrent remote entanglement generation between two qubits coupled dispersively to separate cavities by using a beam splitter with gain, which implements a continuous joint measurement on the signal sources.
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.