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IEEE Transactions on Computers

Quantum Dimension Reduction for Pattern Recognition in High-Resolution Spatio-Spectral Data

Naveed Mahmud, Bennett Haase-Divine, Andrew MacGillivray, Esam El‐Araby

Published Oct 30, 2020• 15 citations
Publisher

Abstract

The promises of advanced quantum computing technology have driven research in the simulation of quantum computers on classical hardware, where the feasibility of quantum algorithms for real-world problems can be investigated. In domains such as High Energy Physics (HEP) and Remote Sensing Hyperspectral Imagery, classical computing systems are held back by enormous readouts of high-resolution data. Due to the multi-dimensionality of the readout data, processing and performing pattern recognition operations for this enormous data are both computationally intensive and time-consuming. In this article, we propose a methodology that utilizes Quantum Haar Transform (QHT) and a modified Grover's search algorithm for time-efficient dimension reduction and dynamic pattern recognition in data sets that are characterized by high spatial resolution and high dimensionality. QHT is performed on the data to reduce its dimensionality at preserved spatial locality, while the modified Grover's search algorithm is used to search for dynamically changing multiple patterns in the reduced data set. By performing search operations on the reduced data set, processing overheads are minimized. Moreover, quantum techniques produce results in less time than classical dimension reduction and search methods. The feasibility of the proposed methodology is verified by emulating the quantum algorithms on classical hardware based on field programmable gate arrays (FPGAs). We present designs of the quantum circuits for multi-dimensional QHT and multi-pattern Grover's search. We also present two emulation techniques and the corresponding hardware architectures for this methodology. A high performance reconfigurable computer (HPRC) was used for the experimental evaluation, and high-resolution images were used as the input data set. Analysis of the methods and implications of the experimental results are discussed.

DOI
10.1109/tc.2020.3034883

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With the promising advancement in quantum computing technology in the last decade, there is a strong motivation to find suitable applications for quantum algorithms and quantum computers. Domains such as High Energy Physics (HEP) have an enormous readout count of high-resolution data. Performing pattern recognition on this readout is computationally challenging and time-consuming because of the multi-dimensionality of the data. In this paper, we propose a methodology that employs quantum algorithms such as Quantum Wavelet Transform and Grover's search algorithm for timeefficient pattern recognition in data sets that are characterized by high spatial resolution and high dimensionality. The motivation behind using quantum algorithms is the potential speedup relative to classical methods, when performed by a quantum computer. In our proposed methodology, Quantum Wavelet Transform is performed on the high spatial resolution data to reduce its dimensionality while quantum Grover's search algorithm is employed to search for target patterns in the reduced data set. Performing the search operation on data with reduced spatial resolution, minimizes processing overheads and computation times. Moreover, use of quantum techniques yield faster results, compared to classical dimension reduction and search methods. We demonstrate the feasibility of the proposed methodology by emulating the quantum algorithms on classical hardware based on field programmable gate arrays (FPGAs). A high performance reconfigurable computer (HPRC) was used for the experimental evaluation. The obtained results are favorable towards our proposed approach.
The high resolution of multidimensional space-time measurements and enormity of data readout counts in applications such as particle tracking in high-energy physics (HEP) is becoming nowadays a major challenge. In this work, we propose combining dimension reduction techniques with quantum information processing for application in domains that generate large volumes of data such as HEP. More specifically, we propose using quantum wavelet transform (QWT) to reduce the dimensionality of high spatial resolution data. The quantum wavelet transform takes advantage of the principles of quantum mechanics to achieve reductions in computation time while processing exponentially larger amount of information. We develop simpler and optimized emulation architectures than what has been previously reported, to perform quantum wavelet transform on high-resolution data. We also implement the inverse quantum wavelet transform (IQWT) to accurately reconstruct the data without any losses. The algorithms are prototyped on an FPGA-based quantum emulator that supports double-precision floating-point computations. Experimental work has been performed using high-resolution image data on a state-of-the-art multinode high-performance reconfigurable computer. The experimental results show that the proposed concepts represent a feasible approach to reducing dimensionality of high spatial resolution data generated by applications such as particle tracking in high-energy physics.
Recent research on the topic of quantum computation provides us with some quantum algorithms with higher efficiency and speedup compared to their classical counterparts. In this paper, it is our intent to provide the results of our investigation of several applications of such quantum algorithms - especially the Grover's Search algorithm - in the analysis of Hyperspectral Data. We found many parallels with Grover's method in existing data processing work that make use of classical spectral matching algorithms. Our efforts also included the study of several methods dealing with hyperspectral image analysis work where classical computation methods involving large data sets could be replaced with quantum computation methods. The crux of the problem in computation involving a hyperspectral image data cube is to convert the large amount of data in high dimensional space to real information. Currently, using the classical model, different time consuming methods and steps are necessary to analyze these data including: Animation, Minimum Noise Fraction Transform, Pixel Purity Index algorithm, N-dimensional scatter plot, Identification of Endmember spectra - are such steps. If a quantum model of computation involving hyperspectral image data can be developed and formalized - it is highly likely that information retrieval from hyperspectral image data cubes would be a much easier process and the final information content would be much more meaningful and timely. In this case, dimensionality would not be a curse, but a blessing.
Quantum algorithms can be efficiently emulated on classical hardware such as field programmable gate arrays (FPGAs), achieving significant speedup over software simulations. However, the increase in the required hardware resources for emulating quantum systems becomes a critical limitation as the number of qubits is increased. In this paper, we propose a scalable emulation framework for modeling quantum algorithms on FPGAs that employs efficient resource scheduling such as space and space-time scheduling. In addition, full floating point precision arithmetic and dataflow non-linear (dynamic) pipelining are also used to achieve higher accuracy and higher throughput. We propose scalable and optimized hardware architectures for Quantum Fourier Transform (QFT) and Grover's search algorithm and demonstrate the scalability of our framework by scaling the system up to 5 fully-entangled qubits. A multi-node (multi-FPGA), state-of-the-art high-performance reconfigurable computer (HPRC) was used for implementation of the proposed architectures. Our experimental results show that by employing efficient resource scheduling techniques, the hardware resource constraints could be mitigated and the proposed emulation framework could be made feasible for emulation of more complex, larger-scale quantum algorithms while maintaining higher accuracy and throughput than existing work.
With rapid advancement in quantum computing technology, continuous efforts are being directed to simulation and emulation of quantum algorithms on classical platforms. A well-known limitation to classical emulation of quantum circuits is scalability. Existing hardware emulators implement gate-based circuit models of quantum circuits that result in heavy resource utilization and degrade the scalability of the system. Also, current quantum emulation hardware use fixedpoint arithmetic, which has an adverse effect on accuracy when the system is scaled up. In this work, we employ a complexmultiply-and-accumulate (CMAC) and lookup-based emulation approach that greatly reduces resource utilization and improves system scalability in terms of number of emulated qubits. We demonstrate emulation of up to 16 fully-entangled qubits which is highest among existing work. We design fully-pipelined, highthroughput hardware architectures that use floating-point precision for higher accuracy. Experimental evaluation and analysis of the architectures in terms of speed and area is also provided. The emulator is prototyped on a high-performance reconfigurable computing (HPRC) system and our results demonstrate quantitative improvement over existing Field-Programmable-Gate-Array (FPGA)-based hardware emulators.
This paper explores the potential of quantum computing to revolutionize pattern recognition, specifically focusing on enhancing accuracy in high-dimensional data. We introduce a novel quantum algorithm, the 'quantum superposition search,' designed to leverage quantum superposition to overcome limitations of classical methods. This research investigates the theoretical and practical implications of applying quantum principles to pattern identification, aiming to demonstrate improved performance across a range of complex datasets. The paper details the algorithm's architecture, its mathematical underpinnings, and preliminary experimental results, highlighting the potential for significant advancements in data analysis and pattern extraction.