Related papers: Entanglement-assisted quantum speedup: Beating local quantum speed limits

Entanglement-assisted quantum speedup: Beating local quantum speed limits

URL: http://arxiv.org/abs/2211.14898v2
Date: Tue, 9 Jul 2024 10:23:32 GMT
Title: Entanglement-assisted quantum speedup: Beating local quantum speed limits
Authors: Farha Yasmin, Jan Sperling,
Abstract summary: Research in quantum information science aims to surpass the scaling limitations of classical information processing. Speed limits in interacting quantum systems are derived by comparing the rates of change in actual quantum dynamics. Proposed speed limits provide a tight bound on quantum speed advantage, including a quantum gain that can scale exponentially with the system's size.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Research in quantum information science aims to surpass the scaling limitations of classical information processing. From a physicist's perspective, performance improvement involves a physical speedup in the quantum domain, achieved by dynamically exploiting quantum correlations. In this study, speed limits in interacting quantum systems are derived by comparing the rates of change in actual quantum dynamics with the quasi-classical evolution confined to the manifold of non-entangled separable states. The utility of the resulting bounds on entanglement-assisted speedup is demonstrated on bipartite qubit systems, bipartite qudit systems, as well as a complex multimode systems. Specifically, the proposed speed limits provide a tight bound on quantum speed advantage, including a quantum gain that can scale exponentially with the system's size. Extensions of the results to open systems and measurable witnesses are discussed.

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