Quantum device circuits made of trapped ions

Summary Parallel computing is an effective method to solve computationally large and data‐intensive problems. The traditional data mining algorithm cannot mining association rules for large amounts of streaming data in a timely and effectively. In order to improve the speed and accuracy of association rules mining, distributed and parallel algorithms have become a research focus. This paper proposes a parallel FP‐growth approach using Spark Streaming, called SSPFP, which can parallel mining frequent itemsets and association rules in real‐time streaming data. In this paper, the proposed SSPFP algorithm is applied to mining the association rules between temperature and salinity in marine Argo data. The experimental results indicate that SSPFP algorithm is efficient for association rules mining.

Section: Introductionmentioning

confidence: 99%

An improved approach for mining association rules in parallel using Spark Streaming

Liu

Wen

Zheng

et al. 2021

“…It was shown that despite the qualitative difference in the function of classical and quantum circuits, some variants of the circuit paradigm remain applicable . A theory and a simulation algorithm for linear ion trap (Paul trap) quantum logic gates were presented . Decoherence was investigated from the circuit paradigm perspective .…”

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confidence: 99%

Guest Editorial – Special Issue on Quantum Circuits

Civalleri

Csurgay

Porod

2017

The paper on 'Quantum Mechanical Computers' by Richard P. Feynman [1] was published in 1986. In the last 30 years, hope and disappointment alternated among engineers about design, fabrication, and operation of quantum computers. The report 'Quantum Shannon Theory' by Peter Shor [2] and his algorithm [3] envisaged progress quantum technology could achieve in metrology, communication, and computing. Visionary papers on 'The Second Quantum Revolution' [4] and on 'The Quantum Internet' [5] assumed that an industry of large-scale quantum machines might emerge.Engineers have been following the remarkable achievements the physics community demonstrated. Experimental platforms such as ion traps in vacuum, spin-based, quantum dot as well as quantum optics-based devices demonstrate the operation of quantum amplifiers and elementary quantum logic gates. However, large enough scale quantum machines could not be built. Challenges to meet the criteria necessary for a real engineering application turned to be daunting [6].In quantum circuits, components as well as their interconnected networks are 'open quantum systems'. There are circuits with components being open quantum systems; nevertheless, their interconnection can be described by classical models. Many nanoelectronic and molecular circuits belong to this class.Since 2001, the International Journal of Circuit Theory and Applications (IJCTA) has been paying attention to bridge circuit design as an engineering discipline with the physics of nanoscale and molecular systems, including the study of quantum phenomena in circuits. The potential of quantum parallelism was investigated [7]. It was shown that despite the qualitative difference in the function of classical and quantum circuits, some variants of the circuit paradigm remain applicable [8]. A theory and a simulation algorithm for linear ion trap (Paul trap) quantum logic gates were presented [9]. Decoherence was investigated from the circuit paradigm perspective [10]. Classical equivalent circuit representation of Coulomb-coupled arrays of quantum devices was presented [11]. State equations for two-level quantum systems in thermal environment [12] and equivalent circuits for quantum propagation of particles in crystals were investigated [13].This Special Issue on Quantum Circuits is devoted to the theory and applications of quantum circuits. The open quantum system character of devices as well as of circuits is assumed. The Special Issue intends to provide a forum for engineers to exchange their experience in their recent developments in the area of quantum circuits.The first macroscopic quantum effect was discoverd by Josephson already in the 1960s [14]. The first applications of circuit theory to assist the design of quantum circuits were applied for Josephson junction amplifiers and mixers [15,16]. In this Issue, the paper 'Quantum Theory of the Dissipative Josephson Parametric Amplifier' [17] deals with superconducting quantum circuits operating close to the quantum limit. Of special interest is the dynamic behav...

Decoherence in quantum systems and the network paradigm

Mathis

Pahlke

Zou

2003

Self Cite

SUMMARYSince quantum systems interact with their environment permanently or within a measurement process, there is much interest in concepts of open quantum system modelling. In this paper we give an overview on three di erent concepts in order to address this problem in the context of the network paradigm. Furthermore the modelling of spatially localized decoherence processes within the stochastic di usion wave equation approach of Gisin et al. is brie y discussed.