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Download e-book for kindle: Ultimate Zero and One : Computing at the Quantum Frontier by Colin P. Williams

By Colin P. Williams

ISBN-10: 0387947698

ISBN-13: 9780387947693

Computing on the fringe of Nature -- Rethinking desktops -- Shrinking know-how -- A Peek Into Quantumland -- The Qubit: final 0 and One -- Are Bits riding Us Bankrupt? -- Quantum Computing -- methods of the alternate -- Quantum reminiscence Registers -- The prepare--evolve--measure Cycle -- Quantum Gates and Quantum Circuits -- instance of a Quantum Computation -- What Can desktops Do? -- The Turing desktop -- Quantum Turing Machines -- Universality -- Computability -- Proving as opposed to supplying evidence -- Complexity -- looking a Quantum yellow pages -- Breaking "Unbreakable" Codes -- The artwork of Concealment -- Encryption Schemes -- Public Key Cryptography -- Code Breaking on a Classical machine -- Code Breaking on a Quantum desktop -- instance hint of Shor's set of rules -- The Crapshoot Universe -- the idea that of Randomness -- makes use of of Random Numbers -- Does Randomness Exist in Nature? -- Pseudorandomness: The artwork of Faking It -- The Plague of Correlations -- Randomness and Quantum desktops -- The Keys to Quantum secrets and techniques -- a few Underlying techniques -- Polarization -- Quantum Cryptography with Polarized Photons -- operating Prototypes -- different ways to Quantum Cryptography -- Teleportation: the last word price tag to journey -- Factorizable Quantum States -- Entanglement: Non-factorizable States -- Spooky motion at a Distance -- Bell's Inequality -- Locality: For Whom the Bell Tolls -- Quantum Teleportation -- Swatting Quantum insects -- Laissez-Faire -- blunders Correction -- Fault-Tolerant Computing -- Topological Quantum Computing

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Additional info for Ultimate Zero and One : Computing at the Quantum Frontier

Sample text

The choice of the model makes no longer a difference: for both of them, a sophisticated scheduling algorithm is needed to ensure good performance. • Finally we discuss both previous problems on general platforms (instead of simple master-worker platforms). Everything becomes quite complicated! For all problems, we need to abandon the hope to minimize the total execution time (or makespan), as for most scheduling problems, makespan minimization is NP-hard, even for a single bag-of-task application onto a tree platform [19].

4. Case study: matrix product under memory constraints In this section we deal with matrix product, a key computational kernel in many scientific applications, which has been extensively studied on parallel architectures. Why revisit the mother-source of parallel algorithms? We address a grid-oriented client-server framework where the user enrolls participating resources (rather than using a fixed parallel machine). And just as we replaced makespan by throughput in the previous section, we replace makespan by communication volume in this case study so as to obtain a tractable problem.

Ii-b) A. Benoit et al. / Algorithms and Scheduling Techniques for Clusters and Grids 35 Replacing Equation (ii) by both Equations (ii-a) and (ii-b) is all that is needed to change to the bounded multi-port model. However, this modification has a dramatic impact on the solution and on the scheduler. Resource selection is not needed any longer. If we enroll all (or sufficiently many) available resources and feed each of them using a pure demand-driven basis (thereby enforcing that αi ≤ min(si , bi )), we end up reaching the maximum throughn put ρopt = min (B, i=1 min(si , bi )) dictated by the master’s outgoing communication capacity.

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Ultimate Zero and One : Computing at the Quantum Frontier by Colin P. Williams

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