S-QGPU: Shared Quantum Gate Processing Unit for Distributed Quantum Computing

Abstract

We propose a distributed quantum computing (DQC) architecture in which individual small-sized quantum computers are connected to a shared quantum gate processing unit (S-QGPU). The S-QGPU comprises a collection of hybrid two-qubit gate modules for remote gate operations. In contrast to conventional DQC systems, where each quantum computer is equipped with dedicated communication qubits, S-QGPU effectively pools the resources (e.g., the communication qubits) together for remote gate operations, and thus significantly reduces the cost of not only the local quantum computers but also the overall distributed system. Our preliminary analysis and simulation show that S-QGPU's shared resources for remote gate operations enable efficient resource utilization. When not all computing qubits (also called data qubits) in the system require simultaneous remote gate operations, S-QGPU-based DQC architecture demands fewer communication qubits, further decreasing the overall cost. Alternatively, with the same number of communication qubits, it can support a larger number of simultaneous remote gate operations more efficiently, especially when these operations occur in a burst mode.

8 pages, 6 figures

References in corpus (16)

• The Quantum Internet
• Trapped-Ion Quantum Computing: Progress and Challenges
• Demonstration of a neutral atom controlled-NOT quantum gate
• Bidirectional and efficient conversion between microwave and optical light
• Validating quantum computers using randomized model circuits
• Building logical qubits in a superconducting quantum computing system
• Experimental Comparison of Two Quantum Computing Architectures
• Quantum Internet: Networking Challenges in Distributed Quantum Computing
• Quantum transduction of optical photons from a superconducting qubit
• Optimal local implementation of non-local quantum gates
• Modular Entanglement of Atomic Qubits using both Photons and Phonons
• Towards a Distributed Quantum Computing Ecosystem
• Local and Distributed Quantum Computation
• Scalable quantum computer with superconducting circuits in the ultrastrong coupling regime
• Distributed quantum computing with photons and atomic memories
• AutoComm: A Framework for Enabling Efficient Communication in Distributed Quantum Programs