Article
Multidisciplinary Sciences
Wei-Jia Huang, Wei-Chen Chien, Chien-Hung Cho, Che-Chun Huang, Tsung-Wei Huang, Seng Ghee Tan, C. Cao, Bei Zeng, Ching-Ray Chang
Summary: Careful study of entangled qubits on the IBM Rochester revealed a scaling property that protects them from environmental noise. Most measurements were reproducible within a short gate operation time, but some combinations of qubits showed significant entanglement evolution. The analysis further delved into the phase trajectory of entangled evolution, as well as the impact of the sudden death of GHZ-like states and the emergence of newly excited states on a noisy intermediate-scale quantum (NISQ) computer.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Mechanical
Chunpeng Zhang, Jing Wei, Shaoshuai Hou, Jiaxiong Zhang
Summary: This study introduces the application of dynamic similarity theory in gear transmission systems and proposes a method to predict the dynamic characteristics of gear systems. By designing scale models and applying similarity theory, the validity of the scaling law for dynamic response is verified.
MECHANISM AND MACHINE THEORY
(2021)
Article
Mathematics, Interdisciplinary Applications
Xiao-Jun Yang
Summary: In this paper, an anomalous chaotic system involving the Mandelbrot scaling-law is proposed, exhibiting the Wukong effect. The comparison between Lorenz and scaling-law attractors is discussed, along with a conjecture for the fixed point theory of the fractal scaling-law attractor. This study may open a new door in the field of chaos theory.
FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY
(2022)
Article
Physics, Multidisciplinary
Vibhav Narayan Singh, Mohammad Umar, Mohammad Hasan, Bhabani Prasad Mandal
Summary: We investigate the properties of non-relativistic quantum tunneling in space fractional quantum mechanics using a group of Cantor potentials. We consider two types of potentials: general Cantor and general Smith-Volterra-Cantor potential. The study explores quantum tunneling through fractal potentials in fractional quantum mechanics for the first time, revealing new scattering features such as energy-band like characteristics and extremely sharp transmission features. Additionally, the scaling relationship between the scattering amplitude and the wave vector k is analytically presented for both types of potentials. (c) 2023 Elsevier Inc. All rights reserved.
Article
Chemistry, Multidisciplinary
John A. Gil-Corrales, Juan A. Vinasco, Miguel E. Mora-Ramos, Alvaro L. Morales, Carlos A. Duque
Summary: In this work, an out-of-equilibrium GaAs/AlGaAs double-barrier resonant tunneling diode system is reviewed. The effects of donor density and external potentials are studied using the finite-element approach and the Landauer formalism. The appearance of negative differential resistance (NDR) is observed, which is a fundamental characteristic of practical applications in devices. The simulation results are compared with experimental data and show good agreement in terms of the resonance peak in the current.
Article
Physics, Multidisciplinary
Zhang Mao-Fang, You Hui-Min, Yin Xiang-Guo, Zhang Yun-Bo
Summary: We investigated the tunneling properties of a particle in a semi-open system. The survival probability of the initial state was analyzed for a semi-Dirac comb model consisting of an infinitely high wall and multiple delta-potential barriers. The analytical solutions and numerical calculations were used to reveal the mechanism of the particle escape process and to control and suppress the escape problem.
ACTA PHYSICA SINICA
(2022)
Article
Physics, Applied
M. Vubangsi, B. F. Kamsu, F. B. Migueu, M. Tchoffo, L. C. Fai
Summary: This research explores the transmission characteristics of a system with variable mass and confined by a Coulomb-like potential. By analyzing the transmission probability, we uncover interesting features observed in a specially designed two-dimensional lattice. Our findings show that the model system is highly sensitive to different parameters, resulting in various unique characteristics such as Andreev-like reflections, reflectionless transmission, and complete charge carrier localization. This study demonstrates the versatility of the effective mass approach in modeling physical systems and provides insights for designing novel electronic devices.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Multidisciplinary Sciences
Xiaohui Xu, Juejun Wang, Nickel Blankevoort, Abdalghani Daaoub, Sara Sangtarash, Jie Shi, Chao Fang, Saisai Yuan, Lichuan Chen, Junyang Liu, Yang Yang, Hatef Sadeghi, Wenjing Hong
Summary: The discovery of quantum interference has great potential in molecular electronics, but it is not clear whether it can be transferred at different length scales. This study found a method to transfer quantum interference from single molecules to assemblies and demonstrated the scalability of quantum interference within molecular cages and their thin films.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Computer Science, Information Systems
Liang Yang, Yin Yang, Daniel Benevides da Costa, Imene Trigui
Summary: This letter investigates a network assisted by multiple reconfigurable intelligent surfaces and analyzes the outage probability and average sum-rate to demonstrate its performance. The results show that the number of RISs and reflecting elements are crucial for network capacity, and the proposed system setup outperforms relay-aided systems in terms of performance.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2021)
Article
Physics, Multidisciplinary
Sungguen Ryu, H. -S. Sim
Summary: Scattering or tunneling of an electron at a potential barrier is a fundamental quantum effect. Understanding electron-electron interactions is crucial in detecting phenomena of electron transport and their application to electron quantum optics.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Applied
Zihan Cui, Longxin Pan, Jingchao Fang, Shichao Qi, Ying Xing, Haiwen Liu, Yi Liu, Jian Wang
Summary: The quantum Griffiths singularity (QGS) is a phenomenon characterized by the divergence of the dynamical critical exponent with the activated scaling law, and it has been observed in various two-dimensional superconductors. Recent research has shown that the direct activated scaling analysis, combined with the consideration of irrelevant correction, can be applied to the experimental data of different superconducting films, providing new evidence for QGS. This method has been successfully used to analyze the experimental data of crystalline PdTe2, polycrystalline beta-W films, tri-layer Ga films, and LaAlO3/SrTiO3 interface superconductors, and it represents a more direct and precise way to analyze QGS in various two-dimensional superconductors compared to previous methods based on finite size scaling.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Physics, Multidisciplinary
Bijan Bagchi, Rahul Ghosh, Sauvik Sen
Summary: In this study, we examine the potential for analogue Hawking radiation in a two-level non-Hermitian PT-symmetric Hamiltonian system using the tetrad-based method. By employing the conventional null-geodesic approach, we describe the Hawking radiation as a quantum tunneling process across a classically forbidden barrier imposed by the event horizon. Notably, our analysis reveals that the tunneling probability is independent of the non-Hermitian parameter governing the guiding Hamiltonian.
Article
Quantum Science & Technology
Qin Wan, Fei Zeng, Junwei Yu, Tongjin Chen, Ziao Lu, Feng Pan
Summary: Research and development of memristor-based neuromorphic networks has reached large-scale application stage, but a thorough understanding of the adopted memristors is still lacking. In this study, a method to manipulate the local activity of NbO quantum dot (QD) system by creating an electrode tip is proposed, enabling reversible nucleation behavior and periodic pulsing. These mechanisms contribute to the information-energy conversion in the QD system and provide a more precise and low energy-consumption approach for neuromorphic computing.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Multidisciplinary Sciences
Mark Brown, Joel E. Cohen, Chuan-Fa Tang, Sheung Chi Phillip Yam
Summary: We generalize Taylor's law to heavy-tailed distributions with tail index alpha in (0, 1) and infinite mean, demonstrating specific relationships between sample statistics and sample mean as sample size increases. These scaling relationships characterize the risk-adjusted performance of investments and are known as Taylor's law in ecology and fluctuation scaling in physics.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Physics, Multidisciplinary
Peng Wang, Chang-Qi Yu, Zi-Xu Wang, Rui-Yang Yuan, Fang-Fang Du, Bao-Cang Ren
Summary: In this paper, hyperentanglement-assisted hyperdistillation schemes are proposed to improve the quality and reduce the resource consumption of photon systems in quantum information processing. The success probability is optimized by utilizing quantum hyper-teleportation. These schemes have potential applications in practical quantum information processing.
FRONTIERS OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
G. Mustafa, S. K. Maurya, Saibal Ray, Faisal Javed
Summary: In this study, we investigate the geometry of wormholes in the framework of general relativity and explore how quantum wave dark matter affects the dynamical configuration of the shell surrounding the wormhole. By using specific shape functions and introducing quantum wave dark matter, we obtain reasonable wormhole solutions and observe its effects on the stability of the shell.
Article
Physics, Multidisciplinary
Pritha Dolai, Christian Maes
Summary: Calorimetry for equilibrium systems aims to determine the energy levels' occupation and distribution by measuring thermal response, while nonequilibrium versions provide additional information on the dynamical accessibility of these states. Using calculations on a driven exclusion process, it is confirmed that a fermionic nonequilibrium steady state with exact computation of specific heat can be achieved. The divergence at zero temperature occurs when the Fermi energy and the kinetic barrier for loading and emptying are approximately equal. Additionally, a stable low temperature regime of negative specific heat appears when the kinetic barrier is density-dependent, indicating an anti-correlation between the stationary occupation's temperature-dependence and excess heat.
Article
Physics, Multidisciplinary
F. F. Nascimento, V. B. Bezerra, J. M. Toledo
Summary: We obtained the metric of the Hayward black hole surrounded by a cloud of strings, and analyzed the effects of the string cloud on the regularity of the solution and the energy conditions. Various aspects such as horizons, geodesics, effective potential, and thermodynamics were investigated. We compared the obtained results with the literature corresponding to the Hayward black hole without a string cloud.
