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Complexity of Fermionic Dissipative Interactions and Applications to Quantum Computing

TitleComplexity of Fermionic Dissipative Interactions and Applications to Quantum Computing
Publication TypeJournal Article
Year of Publication2021
AuthorsO. Shtanko, A. Deshpande, P. S. Julienne, and
JournalPRX Quantum
Volume2
Date PublishedSEP 24
Type of ArticleArticle
Abstract

Interactions between particles are usually a resource for quantum computing, making quantum many-body systems intractable by any known classical algorithm. In contrast, noise is typically considered as being inimical to quantum many-body correlations, ultimately leading the system to a classically tractable state. This work shows that noise represented by two-body processes, such as pair loss, plays the same role as many-body interactions and makes otherwise classically simulable systems universal for quantum computing. We analyze such processes in detail and establish a complexity transition between simulable and nonsimulable systems as a function of a tuning parameter. We determine important classes of simulable and nonsimulable two-body dissipation. Finally, we show how using resonant dissipation in cold atoms can enhance the performance of two-qubit gates.

DOI10.1103/PRXQuantum.2.030350