Article
Quantum Science & Technology
Jeongwan Haah, Matthew B. Hastings
Summary: This study presents detailed measurement sequences for magic state distillation protocols, which can suppress arbitrary errors on any part of a protocol assuming errors across qubits are independent. The protocol operates on a two-dimensional square grid by measuring ZZ on horizontal qubit pairs, XX on vertical pairs, and Z, X on single qubits when provided with input magic states.
Article
Optics
Shraddha Singh, Andrew S. Darmawan, Benjamin J. Brown, Shruti Puri
Summary: Magic state distillation is a resource-intensive subroutine, and our proposed initialization protocol can reduce resource costs by reducing the error rate of input magic states. By utilizing native gate operations of an underlying qubit architecture, our approach offers substantial advantages in the presence of biased noise.
Article
Quantum Science & Technology
Christopher Chamberland, Earl T. Campbell
Summary: This paper introduces a decoder capable of correcting spacelike and timelike errors during lattice-surgery protocols, and computes the logical failure rates of a biased circuit-level noise model for lattice-surgery protocol. It also provides protocols for twist-free lattice surgery and temporally encoded lattice surgery, as well as proposes a layout for a quantum processor that is more efficient for rectangular surface codes.
Article
Quantum Science & Technology
Hayata Yamasaki, Madhav Krishnan Vijayan, Min-Hsiu Hsieh
Summary: The study advances multiperspective understandings of quantum coherence and entanglement by establishing hierarchies of different operations for manipulating them in distributed settings. The results serve as fundamental analytical and numerical tools to investigate the interplay between coherence and entanglement under different operations in the resource theory.
Article
Green & Sustainable Science & Technology
Victor Hugo Grisales Diaz, Mark J. Willis
Summary: A clean coupling process was proposed to recover ethyl acetate and water using a reactive distillation column, avoiding over-recycling of raw materials. An extractive distillation scheme using DMSO was introduced to reduce energy requirements for the purification of a mixture of ethanol, water, and ethyl acetate. By optimizing operating conditions and heat integration, the energy intensity was further reduced.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Electrical & Electronic
Eren Balevi, Jeffrey G. Andrews
Summary: The proposed methodology uses deep generative models and neural networks to represent the channel in a low-dimensional space, achieving near-optimal hybrid beamforming with reduced feedback and computational complexity. It approaches capacity-achieving spectral efficiency, provides a superior energy and spectral efficiency tradeoff, decreases feedback overhead, and reduces complexity significantly. The spectral efficiency remains robust when tested with realistic 3GPP channel models, even with offline training on a simple geometric channel model.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2021)
Article
Physics, Multidisciplinary
Yafei Ren, Qiang Gao, A. H. MacDonald, Qian Niu
Summary: Graphene bilayers exhibit zero-energy flatbands at specific magic twist angles, satisfying a Dirac equation with a non-Abelian SU(2) gauge potential. A semiclassical WKB approximation scheme is developed to analyze these zero-energy solutions, finding values of a dimensionless Planck's constant that correspond closely to numerically determined twist angles.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
Manoj G. Gowda, Pradeep Kiran Sarvepalli
Summary: This paper investigates the use of twists in color codes for encoded computations, focusing on the construction of charge permuting and color permuting twists. It demonstrates that Clifford gates can be realized in color codes with charge permuting twists through braiding, and discusses the implementation of single-qubit Clifford gates and CNOT gates using Pauli frame updates and braiding around color permuting twists. Additionally, it explores the implementation of a non-Clifford gate by state injection, completing the realization of a universal gate set.
Article
Computer Science, Artificial Intelligence
Pedro Freire Popiolek, Karina dos Santos Machado, Odorico Machado Mendizabal
Summary: Modern systems utilize virtualization to create scalable and flexible applications, with cloud computing being a major example. Performance monitors are useful tools for tracking performance behavior, but can become a contention source in large systems.
EXPERT SYSTEMS WITH APPLICATIONS
(2021)
Article
Chemistry, Analytical
Chenyu Yin, Yulun Zhou, Hongxia Liu, Qi Xiang
Summary: A new structure for D flip-flop is proposed in this paper, which sacrifices circuit speed to enhance its resistance to single event upsets. Compared to traditional D flip-flops, this structure has improved resistance, as well as advantages in terms of area and power consumption. It is suitable for soft radiation environments where high circuit speed is not a critical requirement.
Article
Computer Science, Information Systems
Amin Naghavi, Sepideh Safari, Shaahin Hessabi
Summary: Simultaneous energy and reliability management is crucial for battery-operated embedded Mixed-Criticality Systems. This study proposes two comprehensive schemes, MC-2S and MC-4S, which exploit multicore systems' inherent redundancy and low energy overhead to tolerate permanent faults and maintain reliability against transient faults.
IEEE TRANSACTIONS ON EMERGING TOPICS IN COMPUTING
(2022)
Article
Multidisciplinary Sciences
Lawrence Z. Cohen, Isaac H. Kim, Stephen D. Bartlett, Benjamin J. Brown
Summary: This paper presents a low-overhead fault-tolerant quantum computing scheme based on quantum low-density parity-check (LDPC) codes, which enables many logical qubits to be encoded using a modest number of physical qubits through long-range interactions. In this approach, logic gates operate through logical Pauli measurements, preserving both the protection of LDPC codes and low overheads in terms of required additional qubits. Compared to surface codes with the same code distance, there are estimated order-of-magnitude improvements in overheads for processing about 100 logical qubits using this approach. Given the high thresholds demonstrated by LDPC codes, it is suggested that fault-tolerant quantum computation at this scale may be achievable with a few thousand physical qubits at comparable error rates to current approaches.
Article
Engineering, Biomedical
Jagdeep Rahul, Marpe Sora, Lakhan Dev Sharma
Summary: This paper introduces a QRS-complex detection method based on dynamic thresholding and simple decision rules, achieving a sensitivity rate of 99.70% and positive predictivity rate of 99.69% in various databases. The method involves filtering, enhancement, and thresholding processes to ensure accurate detection of QRS-complex in ECG signals, demonstrating computational efficiency and robustness through wide validation across five different databases.
BIOMEDICAL SIGNAL PROCESSING AND CONTROL
(2021)
Article
Computer Science, Artificial Intelligence
Ziwen Li, Yuehuan Wang, Jinpu Zhang
Summary: Low-light image enhancement is important for improving image quality under poor lighting conditions. Currently, CNN-based methods are the mainstream of research and achieve state-of-the-art performance. However, these methods often require large computing resources due to increased network width and depth. In this paper, a knowledge distillation method is proposed to enhance low-light images. The method uses a teacher-student framework to transfer rich knowledge from the teacher network to the student network. The student network learns image enhancement knowledge under the supervision of ground truth images and the guidance of the teacher network simultaneously. Knowledge transfer is accomplished through distillation loss based on attention maps. Experimental results demonstrate the superiority of the proposed method compared to existing methods.
Article
Computer Science, Information Systems
Jiang Liu, Xinyuan Zhang, Ran Zhang, Tao Huang, F. Richard Yu
Summary: Low earth orbit (LEO) small satellites have attracted great interests in civilian and military applications. This article introduces a hierarchical satellite network structure and clustering to enhance satellite network capabilities. A coalition game-theoretic framework and a distributed coalition formation algorithm are proposed to solve the small satellite clustering problem.
IEEE INTERNET OF THINGS JOURNAL
(2022)
