Article
Multidisciplinary Sciences
Si-Yuan Yu, Cheng He, Xiao-Chen Sun, Hong-Fei Wang, Ji-Qian Wang, Zi-Dong Zhang, Bi-Ye Xie, Yuan Tian, Ming-Hui Lu, Yan-Feng Chen
Summary: Waveguides and resonators are core components in the integration of electronics, photonics, and phononics, with the potential for signal filtering, switching, multiplexing, and sensing. Introducing topological insulators into classical waveguide-ring-resonator configurations can eliminate upstream reflections and retain useful transmission spectral characteristics, offering advantages in novel signal processing, sensing, lasering, energy harvesting, and wave-matter interactions. This study contributes to the confidence in utilizing topological protection for practical device performance, suggesting further research opportunities in advancing phononics/photonics technologies.
NATIONAL SCIENCE REVIEW
(2021)
Review
Chemistry, Physical
Aldo Spatafora-Salazar, Dana M. Lobmeyer, Lucas H. P. Cunha, Kedar Joshi, Sibani Lisa Biswal
Summary: Magnetic-guided colloidal assembly has been proven to be a versatile method for building hierarchical particle assemblies with increasing complexity and novel dynamics. By controlling dipolar interactions in static and time-varying magnetic fields, different hierarchical structures like 1-D chains, 2-D networks, and 2-D clusters can be formed, displaying a variety of dynamic phenomena.
Article
Automation & Control Systems
Xuya Cong, Maria Pia Fanti, Agostino Marcello Mangini, Zhiwu Li
Summary: This paper studies the verification problem of critical observability for timed discrete event systems modeled by bounded labeled time Petri nets. The proposed method is a two-fold process that includes a preliminary verification of critical observability for the underlying logic labeled Petri net and a further verification considering the time constraint associated with each transition. This research aims to provide a systematic approach to check critical observability for timed discrete event systems and offer new ideas and insights for practitioners in the field of safety-critical systems.
IEEE TRANSACTIONS ON AUTOMATION SCIENCE AND ENGINEERING
(2023)
Article
Automation & Control Systems
Adam K. Kiss, Tamas G. Molnar, Aaron D. Ames, Gabor Orosz
Summary: This work presents a theoretical framework for the safety-critical control of time delay systems. It extends the theory of control barrier functions to systems with state delay, introducing the notion of control barrier functionals to attain formal safety guarantees in infinite dimensional state space. The proposed framework can handle multiple delays and distributed delays in both dynamics and safety conditions, providing an affine constraint on the control input for provable safety.
INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
(2023)
Article
Medicine, General & Internal
Marta Freire, Gabriel Canizares, Sara Echegoyen, Andrea Gonzalez-Montoro, Antonio J. Gonzalez
Summary: The gamma-ray detectors based on monolithic crystals have shown to be excellent candidates for high-performance PET systems, but face complex and time-consuming calibration processes. Alternative methods have been proposed to mitigate this issue, with Test 2 showing greater similarity and significantly reducing calibration time.
FRONTIERS IN MEDICINE
(2021)
Article
Operations Research & Management Science
Junwei Wang, Yue Gao, Yao Cheng
Summary: Metro systems play a crucial role in public transportation, and safety and passenger satisfaction are important aspects. This study proposes a new framework using smart card data to identify critical platforms and tracks, taking into account the spatial characteristics and temporal dynamics of the metro system.
TRANSPORTATION SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Ertem Esiner, Utku Tefek, Hasan S. M. Erol, Daisuke Mashima, Binbin Chen, Yih-Chun Hu, Zbigniew Kalbarczyk, David M. Nicol
Summary: This paper introduces a new digital signature model that aims to provide key properties of digital signatures while meeting delay requirements and avoiding regression. The concept of Less-online/More-offline Signatures (LoMoS) is proposed to achieve minimal delay and high throughput.
IEEE TRANSACTIONS ON SMART GRID
(2022)
Article
Computer Science, Hardware & Architecture
Ji-Yung Lin, Pieter Weckx, Subrat Mishra, Alessio Spessot, Francky Catthoor
Summary: Ensuring timing guarantees in time-critical applications is becoming more challenging due to increasing performance variability in modern hardware and software. This paper proposes a multitimescale mitigation methodology that utilizes DVFS and HDP parameters to improve performance and calculate a tight upper bound on execution time, thus helping to save energy.
IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS
(2022)
Review
Engineering, Civil
Farzad Piadeh, Kourosh Behzadian, Amir M. Alani
Summary: This paper provides a comprehensive review of the current state and future trends of real-time flood forecasting models in urban drainage systems. It suggests that further investigation should be conducted on the combination of various real-time rainfall measurements and the inclusion of other real-time data, as well as the development of artificial intelligence techniques.
JOURNAL OF HYDROLOGY
(2022)
Article
Computer Science, Information Systems
Aiman Almas, Waseem Iqbal, Ayesha Altaf, Kashif Saleem, Shynar Mussiraliyeva, Muhammad Wajahat Iqbal
Summary: Fog computing is suitable for scenarios with a large number of decentralized devices that require real-time communication and data analysis. It provides dependability and security for time-critical smart healthcare systems. However, trust solutions for fog computing in healthcare are lacking and this research proposes a context-based adaptive trust model using a Bayesian approach and similarity measures.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Chemistry, Physical
L. L. Lage, A. Latge
Summary: This study investigates the electronic properties of Sierpinski triangle flakes and simulated experimental synthesized fractal nanostructures, revealing the self-similarity of energy states and examining the transport responses of quasi-1D molecular chains. The findings provide insight into the synthesis of new molecular chains and shed light on the emergence of flat bands in condensed matter systems.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Review
Pharmacology & Pharmacy
Xiao He, Xuehui Fan, Bing Bai, Nanjuan Lu, Shuang Zhang, Liming Zhang
Summary: Pyroptosis is a form of programmed cell death triggered by various stimuli, and its association with oxidative stress, organelle dysfunction, and other mechanisms can accelerate atherosclerosis progression and plaque formation.
PHARMACOLOGICAL RESEARCH
(2021)
Article
Telecommunications
Rui Yin, Yineng Shen, Huawei Zhu, Xianfu Chen, Celimuge Wu
Summary: This paper investigates the deployment of mobile edge computing in a multi-robot cooperation system and proposes two schemes to optimize computation and communication resources. Through analysis and simulations, it is demonstrated that the second scheme has a longer function time and enhanced robustness.
CHINA COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Ahmed Al Harraq, Aubry A. Hymel, Emily Lin, Thomas M. Truskett, Bhuvnesh Bharti
Summary: Competition between attractive and repulsive interactions between colloidal particles drives the formation of complex assemblies. In this study, the dual functionality of magnetic nanoparticle dispersions is exploited to simultaneously drive attraction and repulsion between suspended non-magnetic microspheres, allowing for precise tuning of the interaction energy landscape of colloidal particles.
COMMUNICATIONS CHEMISTRY
(2022)
Article
Physics, Fluids & Plasmas
Naveen Kumar, Suram Singh, Avinash Chand Yadav
Summary: The hypothesis of self-organized criticality is used to explain the long-range space-time correlations observed in natural dynamical systems, particularly focusing on sandpile models exhibiting nontrivial correlations. The study finds that spatial crosscorrelation decays in a power-law manner with an exponent of gamma = 1-8, where 8 characterizes the scaling of total power of the global temporal process with system size.
Article
Physics, Multidisciplinary
Rhine Samajdar, Wen Wei Ho, Hannes Pichler, Mikhail D. Lulcin, Subir Sachdev
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Multidisciplinary
Dominic Else, Wen Wei Ho, Philipp T. Dumitrescu
Article
Multidisciplinary Sciences
Paul Niklas Jepsen, Jesse Amato-Grill, Ivana Dimitrova, Wen Wei Ho, Eugene Demler, Wolfgang Ketterle
Article
Multidisciplinary Sciences
Rhine Samajdar, Wen Wei Ho, Hannes Pichler, Mikhail D. Lukin, Subir Sachdev
Summary: Density-matrix renormalization group calculations show a wide variety of complex solid phases and a region with dense Rydberg excitations, large entanglement entropy, and no local order parameter on the kagome lattice of neutral atoms at zero temperature. The regime could contain one or more phases with topological order, as suggested by mapping to the triangular lattice quantum dimer model and theories of quantum phase transitions. These results lay the foundation for theoretical and experimental explorations of crystalline and liquid states using programmable quantum simulators based on Rydberg atom arrays.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Multidisciplinary Sciences
D. Bluvstein, A. Omran, H. Levine, A. Keesling, G. Semeghini, S. Ebadi, T. T. Wang, A. A. Michailidis, N. Maskara, W. W. Ho, S. Choi, M. Serbyn, M. Greiner, V. Vuletic, M. D. Lukin
Summary: The study demonstrates that coherent revivals associated with quantum many-body scars can be stabilized by periodic driving, generating a robust subharmonic response akin to discrete timecrystalline order. This finding provides new ways to control complex dynamics in many-body systems and may have potential applications in quantum information science.
Article
Multidisciplinary Sciences
Sepehr Ebadi, Tout T. Wang, Harry Levine, Alexander Keesling, Giulia Semeghini, Ahmed Omran, Dolev Bluvstein, Rhine Samajdar, Hannes Pichler, Wen Wei Ho, Soonwon Choi, Subir Sachdev, Markus Greiner, Vladan Vuletic, Mikhail D. Lukin
Summary: This paper demonstrates a programmable quantum simulator based on deterministic arrays of neutral atoms, realizing a quantum spin model with tunable interactions and investigating various new quantum phases and interactions. These observations offer a new perspective on the study of complex quantum matter and pave the way for investigations of exotic quantum phases and hardware-efficient realization of quantum algorithms.
Article
Physics, Multidisciplinary
N. Maskara, A. A. Michailidis, W. W. Ho, D. Bluvstein, S. Choi, M. D. Lukin, M. Serbyn
Summary: Recent experiments in Rydberg atom arrays have shown that coherent revivals associated with quantum many-body scars can be stabilized by periodic driving. This behavior originates from spatiotemporal ordering in an effective Floquet unitary, displaying discrete time-crystalline behavior in a prethermal regime. The subharmonic response exists only for certain initial states and shows robustness to perturbations, suggesting a potential route to controlling entanglement in interacting quantum systems.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Wen Wei Ho, Soonwon Choi
Summary: We present a novel kind of emergent random matrix universality exhibited by quantum manybody systems at infinite temperature. The ensemble of pure states supported on a small subsystem, generated from projective measurements of the remainder of the system, approaches a universal form independent of system details. This implies that the distribution of quantum states becomes indistinguishable from uniformly random ones, opening up new ways for quantum state tomography and benchmarking.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Paul Niklas Jepsen, Wen Wei Ho, Jesse Amato-Grill, Ivana Dimitrova, Eugene Demler, Wolfgang Ketterle
Summary: The study utilizes ultracold atoms to simulate the dynamics of 1D Heisenberg spin chains, observing fast spin decay controlled by anisotropy and dephasing caused by the effective magnetic field from superexchange. The research also reveals new dephasing mechanisms, including inhomogeneity of the effective field, reduction of field at chain edges, and fluctuations due to mobile holes. These mechanisms have not been previously observed with ultracold atoms, providing insights into the Hubbard model.
Article
Physics, Multidisciplinary
Paul Niklas Jepsen, Yoo Kyung 'Eunice' Lee, Hanzhen Lin, Ivana Dimitrova, Yair Margalit, Wen Wei Ho, Wolfgang Ketterle
Summary: This study experimentally demonstrates the existence of a special type of spin-helix state in quantum many-body systems, which can evade general thermalization and be used to measure interaction anisotropy. These findings have important implications for quantum simulation and many-body dynamics.
Article
Physics, Multidisciplinary
Minh C. Tran, Daniel K. Mark, Wen Wei Ho, Soonwon Choi
Summary: In conventional approaches, extracting arbitrary information from quantum states requires measurements in different bases, which may be challenging for current quantum devices. We propose a scalable protocol that utilizes the ergodic nature of quantum dynamics to efficiently extract physical properties without sophisticated controls. This protocol can be implemented in existing analog quantum simulation platforms.
Article
Physics, Multidisciplinary
Wen Wei Ho, Takashi Mori, Dmitry A. Abanin, Emanuele G. Dalla Torre
Summary: Floquet prethermalization refers to the phenomenon where many-body systems subject to high-frequency periodic driving avoid heating and tend to transient states that can host interesting physics. This article reviews our present understanding of this phenomenon and its applications in novel nonequilibrium phases of matter and experiments with quantum simulators. The article also explores the frontiers of Floquet prethermalization beyond strictly time-periodic drives, including time-quasiperiodic driving and long-lived quasi-conserved quantities.
Article
Quantum Science & Technology
Matteo Ippoliti, Wen Wei Ho
Summary: In this study, we investigate the emergence of a universal, uniform distribution of quantum states supported on a finite subsystem over time, induced by measuring the remaining part of the system. This phenomenon, known as deep thermalization, represents a stronger form of equilibration in quantum many-body systems compared to regular thermalization. We propose an exactly-solvable model of chaotic dynamics that demonstrates the occurrence of these two processes on different time scales.
Article
Materials Science, Multidisciplinary
Sambuddha Chattopadhyay, Hannes Pichler, Mikhail D. Lukin, Wen Wei Ho
Article
Optics
Wen Wei Ho, Cheryne Jonay, Timothy H. Hsieh
