Results 11 to 20 of about 108,083 (217)
Topological quantum gates with quantum dots [PDF]
Journal of Optics B: Quantum and Semiclassical Optics, 2003 8 pages, 3 figures, submitted to Jour. of Opt. B (special issue on Quantum Computing)
Pachos, J, Vedral, V
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, 2002 In this paper we study universality for quantum gates acting on qudits.Qudits are states in a Hilbert space of dimension d where d is at least two. We determine which 2-qudit gates V have the properties (i) the collection of all 1-qudit gates together with V produces all n-qudit gates up to arbitrary precision, or (ii) the collection of all 1-qudit ...
Ranee Brylinski, Jean-Luc Brylinski
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Quantum Teleportation of Optical Quantum Gates [PDF]
Physical Review Letters, 2003 We show that a universal set of gates for quantum computation with optics can be quantum teleported through the use of EPR entangled states, homodyne detection, and linear optics and squeezing operations conditioned on measurement outcomes. This scheme may be used for fault-tolerant quantum computation in any optical scheme (qubit or continuous ...
William J. Munro, Stephen D. Bartlett
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Coupled quantum dots as quantum gates [PDF]
Physical Review B, 1999 We consider a new quantum gate mechanism based on electron spins in coupled semiconductor quantum dots. Such gates provide a general source of spin entanglement and can be used for quantum computers. We determine the exchange coupling J in the effective Heisenberg model as a function of magnetic (B) and electric fields, and of the inter-dot distance (a)
Burkard, G., Loss, D., DiVincenzo, D. P.
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Physical Review A, 2010 We study ultracold collisions of ions with neutral atoms in traps. Recently, ultracold atom-ion systems are becoming available in experimental setups, where their quantum states can be coherently controlled. This allows for an implementation of quantum information processing combining the advantages of charged and neutral particles. The state-dependent
Doerk H., Idziaszek Z., Calarco T.
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Quantum walks, quantum gates, and quantum computers [PDF]
Physical Review A, 2007 The physics of quantum walks on graphs is formulated in Hamiltonian language, both for simple quantum walks and for composite walks, where extra discrete degrees of freedom live at each node of the graph. It is shown how to map between quantum walk Hamiltonians and Hamiltonians for qubit systems and quantum circuits; this is done for both a single- and
Andrew P. Hines +2 more
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Optically driven silicon-based quantum gates with potential for high-temperature operation [PDF]
, 2003 We propose a new approach to constructing gates for quantum information processing, exploiting the proper-ties of impurities in silicon. Quantum information, embodied in electron spins bound to deep donors, is coupled via optically induced electronic ...
Fisher, AJ, Greenland, PT, Stoneham, AM
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A universal quantum estimator [PDF]
, 2005 Almost all computational tasks in the modem computer can be designed from basic building blocks. These building blocks provide a powerful and efficient language for describing algorithms.
ARTUR K. EKERT +11 more
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Quantum gates and circuits [PDF]
Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 1998 A historical review is given of the emergence of the idea of the quantum logic gate from the theory of reversible Boolean gates. I highlight the quantum XOR or controlled NOT as the fundamental two-bit gate for quantum computation. This gate plays a central role in networks for quantum error correction.
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