Reconstructing cut quantum circuits maximising fidelity between quantum states

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Abstract

Quantum circuit cutting is an emerging field of quantum computing allowing quantum circuits requiring a relatively large number of qubits to be executed on a quantum computer which has a smaller number of qubits. Current works focus mainly on choosing the optimal position to cut circuits, in order to minimise classical reconstruction costs. They do not consider the detrimental effects of cutting circuits on the entanglement shared between the circuit qubits. This paper presents, so far as the authors are aware, the first works to globally reconstruct circuit cutting fragments by maximising the underlying fidelity between quantum states used within circuit computation. Consequently, the original entanglement present that was broken, is reformed. Gradient-based techniques are used to design an optimisation protocol for how to maximise the fidelity between highly multipartite-entangled states. Using adaptive gradient descent this work presents how unit fidelities can be achieved with a relatively small number of optimisation iterations.
Original languageEnglish
Title of host publicationCF '24: Proceedings of the 21st ACM International Conference on Computing Frontiers
PublisherAssociation for Computing Machinery
Pages224 - 231
ISBN (Electronic)9798400705977
DOIs
Publication statusPublished - 02 Jul 2024
Event
CF '24: 21st ACM International Conference on Computing Frontiers
- Ischia, Italy
Duration: 07 May 202409 May 2024

Publication series

NameProceedings of the ACM International Conference on Computing Frontiers
PublisherAssociation for Computing Machinery

Conference

Conference
CF '24: 21st ACM International Conference on Computing Frontiers
Country/TerritoryItaly
CityIschia
Period07/05/202409/05/2024

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