15-19 September 2025
REAL JARDÍN BOTÁNICO
Europe/Madrid timezone
As part of the International Year of Quantum Science and Technology, the workshop Entangle This VI will bring together experts at the forefront of quantum theory and experiment. It is organized by the Quantum groups at IFT and IFF.

Entangled states from sparsely coupled spins for metrology with neutral atoms

Not scheduled
2h
REAL JARDÍN BOTÁNICO

REAL JARDÍN BOTÁNICO

Plaza Murillo, 2, Retiro, 28014 Madrid, Spain

Description

Quantum states featuring extensive multipartite entanglement are a resource for quantum-enhanced metrology, with sensitivity up to the Heisenberg limit. However, robust generation of these states using unitary dynamics typically requires all-to-all interactions among particles. Here, we demonstrate that optimal states for quantum sensing can be generated with sparse interaction graphs featuring only a logarithmic number of couplings per particle. We show that specific sparse graphs with long-range interactions can approximate the dynamics of all-to-all spin models, such as the one-axis twisting model, even for large system sizes. The resulting sparse coupling graphs and protocol can also be efficiently implemented using dynamic reconfiguration of atoms in optical tweezers.

Primary author

Sridevi Kuriyattil (University of Oxford)

Co-authors

Dr. Johannes Kombe Dr. Pablo Poggi (University of Strathclyde) Prof. Jonathan Pritchard (University of Strathclyde) Prof. Andrew Daley (University of Oxford)

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