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Physica
North-Holland
Physica

North-Holland

0378-4371

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    A novel quantum image encryption technique based on improved controlled alternated quantum walks and hyperchaotic system

    Zhang J.Zhang H.Gao Y.-J.Xie H.-W....
    5页
    查看更多>>摘要：© 2022 Elsevier B.V.This paper proposes a novel quantum image encryption algorithm based on a local substitution and global permutation scheme. First, a plaintext-related secret key is generated by using a hyperchaotic system; second, the plain image is scrambled employing a block-based general Arnold transform and permutation-based special linear transform; third, S-box substitution and special linear transform are iterated multiple times until certain conditions are achieved. A novel controlled alternated quantum walks scheme is also proposed to generate substitution boxes. Numerical simulation shows that the proposed encryption scheme can effectively a encrypt plain image to an incomprehensible noise image, and is capable of resisting a variety of attacks.
      原文链接:
    • NSTL

    The Wigner function negative value domains and energy function poles of the polynomial oscillator

    Perepelkin E.E.Sadovnikov B.I.Burlakov E.V.Afonin P.V....
    5页
    查看更多>>摘要：© 2022 Elsevier B.V.For a quantum oscillator with the polynomial potential an explicit expression that describes the energy distribution as a coordinate (and momentum) function is obtained. The presence of the energy function poles is shown for the quantum system in the domains where the Wigner function has negative values.
      原文链接:
    • NSTL

    Right-turn-on-red queueing process at signalized intersections with a short right-turn lane

    Yang Q.He Y.
    5页
    查看更多>>摘要：© 2022 Elsevier B.V.For right-turn-on-red (RTOR) movements at signalized intersections, in addition to being subject to the periodically change of traffic signals, RTOR vehicles are frequently interrupted at any time within the red phase due to the blockage, which makes that the performance of RTOR control has a strong instability. While the operation of RTOR with a short right-turn lane is well understood in the literature, there is no clear understanding on the RTOR queue dynamics and how the RTOR queueing evolution process is affected by the possible factors. To this end, this study developed an analytical framework using a signal-state-based queueing model to evaluate the use of RTOR control. The analytical framework establishes a series of evaluation indicators for RTOR control, which can explicitly quantify the inherent uncertainty of RTOR queue at signalized intersections. The obtained results were further examined through VISSIM and the comparisons showed that proposed analytical model can evaluate the RTOR queue with a small error. Furthermore, various factors influencing RTOR queue were examined by numerical experiments. These results show that the obtained analytical expressions of RTOR queue dynamics can give us valuable insights and contribute to supporting the right-turn movement management of signalized intersections from the perspective of queueing processes.
      原文链接:
    • NSTL

    Geometrical description of the state space in spin crossover solids with high-spin low-spin degree of freedom

    Erdem R.
    5页
    查看更多>>摘要：© 2022 Elsevier B.V.Ising-like model of the spin-crossover solids is studied making use of thermodynamic geometry in the Ruppeiner formalism. A thermal metric tensor (Gij) and corresponding thermodynamic curvature or Ricci scalar (R) are computed for a 2D “magnatization” vs “temperature” state space. The two metric components, namely G12 and G22, have the finite extremum above the critical temperature in the high-spin state. On the other hand, R abruptly jumps between the R>0 and R<0 regions along the first-order high-spin/low-spin transition line while the curvature jump disappears when the critical point (C) is reached. It exhibits smooth changes beyond C along the R=0 line. A different vanishing curvature line with R=0 is also observed in the high-spin state regime in the geometric phase diagram.
      原文链接:
    • NSTL