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FPGA-Based Emulation Framework for Two-Qubit Quantum Computation: Design, Implementation, and Validation v2

Arfeen Zahra, Madiha Khalid, Naveed Riaz, Salman Waheed, Umar Mujahid, Prof. Dr. Muhammad Najam ul Islam

Published Jul 20, 2026• 1 citation
Publisher

Abstract

Quantum computing leverages quantum mechanics to perform complex computations efficiently, yet its practical implementation is hindered by hardware-software interdependence and quantum state instability. This paper advances lightweight FPGA-based quantum emulation by incorporating a universal quantum gate set, including parameterized Phase gates and the CNOT gate, to support comprehensive quantum protocol emulation on FPGA hardware. The FPGA platform used for synthesis is Atrix 7. The proposed emulator is validated through simulations of quantum circuits, including Bell States, the Deutsch algorithm, Superdense coding, Grover’s search, and BB84 QKD, with results benchmarked against IBM’s noiseless quantum simulator. Utilizing FPGA’s customizable parallelism and energy efficiency, this framework offers a resource-efficient, reliable platform for developing and testing quantum algorithms.

DOI
10.17504/protocols.io.dm6gp4bqpgzp/v2

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Quantum computing leverages quantum mechanics to perform complex computations efficiently, yet its practical implementation is hindered by hardware-software interdependence and quantum state instability. This paper advances lightweight FPGA-based quantum emulation by incorporating a universal quantum gate set, including parameterized Phase gates and the CNOT gate, to support comprehensive quantum protocol emulation on FPGA hardware. The FPGA platform used for synthesis is Artix-7. The proposed emulator is validated through simulations of quantum circuits, including Bell States, the Deutsch algorithm, Superdense coding, Grover's search, and BB84 QKD, with results benchmarked against IBM's noiseless quantum simulator. Utilizing FPGA's customizable parallelism and energy efficiency, this framework offers a resource-efficient, reliable platform for developing and testing quantum algorithms.
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.
Quantum computing (QC) leverages superposition, entanglement, and parallelism to solve complex problems that are challenging for classical computing methods. The immense potential of QC has spurred explosive interest and research in both academia and industry. However, the practicality of QC based on large-scale quantum computers remains limited by issues of scalability and error correction. To bridge this gap, QC emulators utilizing classical computing resources have emerged, with modern implementations employing FPGAs for efficiency. Nevertheless, FPGA-based QC emulators face significant limitations, particularly in standalone implementations required for low-power, low-performance devices like IoT end nodes, embedded systems, and wearable devices, due to their substantial resource demands. This paper proposes optimization techniques to reduce resource requirements and enable standalone FPGA implementations of QC emulators. We specifically focused on Grover's algorithm, known for its excellent performance in searching unstructured databases. The proposed resource-saving optimization techniques allow for the emulation of the largest possible Grover's algorithm within the constrained resources of FPGAs. Using these optimization techniques, we developed a hardware accelerator for Grover's algorithm and integrated it with a RISC-V processor architecture. We completed a standalone Grover's algorithm-specific emulator operating on FPGAs, demonstrating significant performance enhancements and resource savings afforded by the proposed techniques.
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.
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.