Arbitrary parallel entangling gates with independent calibration on a trapped ion quantum computer

📅 2026-04-28
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🤖 AI Summary
This work addresses the challenge of efficiently implementing parallel entangling gates on arbitrary graph topologies in trapped-ion quantum computers by proposing a graph-agnostic parallel entangling gate scheme. Combining an independent calibration mechanism with efficient pulse synthesis techniques, the method enables high-fidelity operations across arbitrary connectivity patterns, achieving fidelities approaching those of single-pair gates. When applied to multi-chain trapped-ion architectures, the approach substantially enhances both calibration efficiency and execution speed. Experimental validation on three representative quantum algorithms demonstrates nearly linear speedup, significantly reducing overall circuit runtimes.
📝 Abstract
Parallel processing of information plays a critical role in accelerating computation. This includes quantum computers, where parallel processing of quantum information will play a critical role in practical quantum advantage. Here, we demonstrate a new type of parallel entangling gates in a trapped-ion quantum computer, that simultaneously provides efficient gate-pulse synthesis and calibration, as well as graph-pattern-agnostic implementation. We demonstrate the resulting reduced execution time in three well-known algorithms, exhibiting disjoint gates, a star graph and a ring graph respectively. For disjoint qubit pairs the execution time of our parallel gates is comparable to that of a single-pair entangling gate resulting in an approximately linear speed up. For all graph patterns our parallel gate fidelities are comparable to the fidelity of a single-pair entangling gate. These advantages motivate architectures featuring multiple medium length ion chains in future quantum computing devices.
Problem

Research questions and friction points this paper is trying to address.

parallel entangling gates
trapped-ion quantum computer
quantum computation
gate calibration
execution time
Innovation

Methods, ideas, or system contributions that make the work stand out.

parallel entangling gates
trapped-ion quantum computing
graph-pattern-agnostic
independent calibration
gate-pulse synthesis
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