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Search results for: QUANTUM
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Search results for: QUANTUM

  • Dynamical description of quantum computing: generic nonlocality of quantumnoise

    Publication

    We develop a dynamical non-Markovian description of quantum computing in the weak-coupling limit, in the lowest-order approximation. We show that the long-range memory of the quantum reservoir (such as the 1/t4 one exhibited by electromagnetic vacuum) produces a strong interrelation between the structure of noise and the quantum algorithm, implying nonlocal attacks of noise. This shows that the implicit assumption of quantum error...

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  • Quantum Matter

    Journals

    ISSN: 2164-7615

  • Quantum Topology

    Journals

    ISSN: 1663-487X , eISSN: 1664-073X

  • QUANTUM ELECTRONICS

    Journals

    ISSN: 1063-7818 , eISSN: 1468-4799

  • PRX Quantum

    Journals

    eISSN: 2691-3399

  • Quantum Reports

    Journals

    eISSN: 2624-960X

  • Blurred quantum Darwinism across quantum reference frames

    Publication

    Quantum Darwinism describes objectivity of quantum systems via their correlations with their environment--information that hypothetical observers can recover by measuring the environments. However, observations are done with respect to a frame of reference. Here, we take the formalism of [Giacomini, Castro-Ruiz, & Brukner. Nat Commun 10, 494 (2019)], and consider the repercussions on objectivity when changing quantum reference...

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  • Anomalous decay of quantum correlations of quantum-dot qubits

    Publication

    - PHYSICAL REVIEW A - Year 2013

    We study the evolution of quantum correlations, quantified by the geometric discord, of two excitonic quantum-dot qubits under the influence of the phonon environment. We show that the decay of these correlations differs substantially from the decay of entanglement. Instead of displaying sudden-death-type behavior, the geometric discord shows a tendency to undergo transitions between different types of decay, is sensitive to nonlocal...

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  • Quantum entanglement

    Publication

    - REVIEWS OF MODERN PHYSICS - Year 2009

    All our former experience with application of quantum theory seems to say that what is predicted by quantum formalism must occur in the laboratory. But the essence of quantum formalism-entanglement, recognized by Einstein, Podolsky, Rosen, and Schrödinger-waited over 70 years to enter laboratories as a new resource as real as energy. This holistic property of compound quantum systems, which involves nonclassical correlations between...

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  • Cartoon computation: Quantum-like algorithms without quantum mechanics

    Zaproponowano formalizm prowadzący do algorytmów analogicznych do kwantowych, lecz wykorzystujący jedynie struktury geometryczne. Jako przykład sformułowano odpowiednik kwantowego algorytmu Deutscha-Jozsy.

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