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Träfflista för sökning "WFRF:(Cabello Adán) ;pers:(Tavakoli Armin)"

Search: WFRF:(Cabello Adán) > Tavakoli Armin

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1.
  • Tavakoli, Armin, et al. (author)
  • Quantum Clock Synchronization with a Single Qudit
  • 2015
  • In: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 5
  • Journal article (peer-reviewed)abstract
    • Clock synchronization for nonfaulty processes in multiprocess networks is indispensable for a variety of technologies. A reliable system must be able to resynchronize the nonfaulty processes upon some components failing causing the distribution of incorrect or conflicting information in the network. The task of synchronizing such networks is related to Byzantine agreement (BA), which can classically be solved using recursive algorithms if and only if less than one-third of the processes are faulty. Here we introduce a nonrecursive quantum algorithm, based on a quantum solution of the detectable BA, which achieves clock synchronization in the presence of arbitrary many faulty processes by using only a single quantum system.
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2.
  • Tavakoli, Armin, et al. (author)
  • Quantum predictions for an unmeasured system cannot be simulated with a finite-memory classical system
  • 2018
  • In: Physical Review A: covering atomic, molecular, and optical physics and quantum information. - 2469-9926 .- 2469-9934. ; 97:3
  • Journal article (peer-reviewed)abstract
    • We consider an ideal experiment in which unlimited nonprojective quantum measurements are sequentially performed on a system that is initially entangled with a distant one. At each step of the sequence, the measurements are randomly chosen between two. However, regardless of which measurement is chosen or which outcome is obtained, the quantum state of the pair always remains entangled. We show that the classical simulation of the reduced state of the distant system requires not only unlimited rounds of communication, but also that the distant system has infinite memory. Otherwise, a thermodynamical argument predicts heating at a distance. Our proposal can be used for experimentally ruling out nonlocal finite-memory classical models of quantum theory.
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  • Result 1-2 of 2
Type of publication
journal article (2)
Type of content
peer-reviewed (2)
Author/Editor
Cabello, Adan (2)
Tavakoli, Armin (2)Undo refine
Zukowski, Marek (1)
Bourennane, Mohamed (1)
University
Stockholm University (2)
Language
English (2)
Research subject (UKÄ/SCB)
Natural sciences (2)

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