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International Journal of Reconfigurable Computing

An FPGA-Based Quantum Computing Emulation Framework Based on Serial-Parallel Architecture

Y. H. Lee, Mohamed Khalil-Hani, Muhammad Nadzir Marsono

Published Jan 1, 2016• 38 citations
Publisher

Abstract

Hardware emulation of quantum systems can mimic more efficiently the parallel behaviour of quantum computations, thus allowing higher processing speed-up than software simulations. In this paper, an efficient hardware emulation method that employs a serial-parallel hardware architecture targeted for field programmable gate array (FPGA) is proposed. Quantum Fourier transform and Grover’s search are chosen as case studies in this work since they are the core of many useful quantum algorithms. Experimental work shows that, with the proposed emulation architecture, a linear reduction in resource utilization is attained against the pipeline implementations proposed in prior works. The proposed work contributes to the formulation of a proof-of-concept baseline FPGA emulation framework with optimization on datapath designs that can be extended to emulate practical large-scale quantum circuits.

DOI
10.1155/2016/5718124

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Hardware emulation of quantum systems can mimic more efficiently the parallel behaviour of quantum computations, thus allowing higher processing speed-up than software simulations. In this paper, an efficient hardware emulation method that employs a serial-parallel hardware architecture targeted for field programmable gate array (FPGA) is proposed. Quantum Fourier transform and Grover’s search are chosen as case studies in this work since they are the core of many useful quantum algorithms. Experimental work shows that, with the proposed emulation architecture, a linear reduction in resource utilization is attained against the pipeline implementations proposed in prior works. The proposed work contributes to the formulation of a proof-of-concept baseline FPGA emulation framework with optimization on datapath designs that can be extended to emulate practical large-scale quantum circuits.
Hardware emulation based on field programmable gate array (FPGA) platform is vital to harness the power of quantum parallelism. As resource requirement grows exponentially in classical modeling quantum system, an optimum hardware architecture is crucial to emulate practical quantum circuits. Quantum Fourier transform (QFT) finds application in several critical quantum algorithms. In this work, experiments are conducted based on QFT to identify suitable qubit representation and hardware design technique. Experimental results show that 24-bit fixed point representation and serial architecture achieve optimal computation accuracy and resource utilization in QFT circuit emulation.
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.
Powerful parallelism is among the leading attractions to- wards quantum computing research. Before large-scale quantum computers become viable, the use of field- programmable gate array (FPGA) technology which can mimic the behavior of quantum parallelism is vital. In this paper, a methodology to perform mapping of quan- tum algorithms for efficient quantum hardware emulations is proposed. The case study to demonstrate the proposed methodology is the emulation of quantum Fourier trans- form. With the design considerations on the superposi- tion and entangled input state as well as the choice of ef- ficient hardware architecture, the proposed work provides a guideline for conducting accurate FPGA-based quantum hardware emulations for practical quantum applications.
The introduction of quantum computing has led to an immense increase in performance of various search and encryption algorithms. However the practical realization of quantum computers is1a challenging task. Hence quantum algorithms are being modeled on classical platforms. Hardware emulation of quantum computers has been found to be more effective than software simulations. In this paper, Grover's search algorithm has been modeled in the classical platform using both hardware emulation and software simulation approaches. The modified architecture of the field programmable gate arrays (FPGAs) and the unique data path implemented in this paper results in considerable speed-up and lesser utilization of resources as compared to other existing works. This work includes both simulation and emulation of Grover’s search for 2,3 and 5 qubit systems. The novel emulation approach has led to a 104times reduction in time of search than the corresponding simulation.
Quantum hardware emulators using field programmable gate arrays (FPGAs) have been demonstrated to efficiently exploit the inherent parallelism of quantum algorithms and perform better than sequential software simulators. However, one key problem in mapping quantum circuits on FPGAs is the exponential increase in resource requirements with the increase in the number of quantum bits (qubits). As a result, the precision of hardware emulators is often reduced to save resources and accommodate larger quantum circuits which results in lower accuracy and lower throughput. In this paper, we present a full precision FPGA quantum emulator that uses 32-bit floating-point arithmetic and has a fully pipelined architecture. Our emulator is capable of emulating an entangled 4-qubit quantum system performing Quantum Fourier Transform, Grover's Search algorithms on a single FPGA node. Our experimental work was conducted on a highly scalable multi-node (multi-FPGA) state-of-the-art high-performance reconfigurable computer (HPRC). Experimental results show that our emulator is functionally accurate and has a higher operating frequency relative to other emulators. For emulating larger-scale circuits we propose using a multi-node architecture scheme with low latency, high bandwidth inter-node communication.
Although, there have been considerable advances in quantum technology, a great scale quantum computer will not be available until about a few years. In the meantime, it requires quantum emulators which allow to study the existing quantum algorithms and the design of new ones. We propose a flexible method to emulate quantum circuits which reduces design and processing time. In this context, we propose a design framework that takes advantage of field-programmable gate array (FPGA) parallel processing technology in combination with high-level programming tools provided by Vivado. In order to show the design method working Quantum Fourier Transform (QFT) is implemented. Every step of the design is described and circuit performance is studied for different cases of input vector data sizes.