Optimization of spin squeezing for applications in solid-state and molecular spin systems
ORAL
Abstract
Abstract:
Spin-squeezed states enable quantum sensing beyond the standard quantum limit, with applications ranging from enhanced NMR/EPR spectroscopy to materials characterization. In recent theoretical work, we have shown that spin squeezing can be generated by spin systems interacting via magnetic dipole–dipole interactions, and that the normalized uncertainty can be reduced to a value smaller than the standard quantum limit using spin-squeezed states [1]. This approach, based on dipole-coupled spin systems, sheds light on experimentally demonstrating spin-squeezed states and utilizing them for quantum sensing and other quantum methodologies. In this talk, we discuss optimizing the efficiency of spin-squeezing generation by integrating our approach with optimized spin configurations and time-dependent controls, such as tailored pulse sequences. We systematically analyze how spin geometry—using spin rings, chains, triangular clusters, and 3D architectures—determines squeezing performance. By mapping the relationship between spatial arrangement and interaction topology, we establish quantitative design rules for synthesizing quantum sensor networks. Moreover, we consider Floquet engineering via time-periodic driving to enhance spin squeezing. For this study, we utilize both classical and quantum computational simulations. This work bridges quantum control theory and synthetic chemistry, providing experimentalists with concrete molecular targets for next-generation quantum sensing application.
Spin-squeezed states enable quantum sensing beyond the standard quantum limit, with applications ranging from enhanced NMR/EPR spectroscopy to materials characterization. In recent theoretical work, we have shown that spin squeezing can be generated by spin systems interacting via magnetic dipole–dipole interactions, and that the normalized uncertainty can be reduced to a value smaller than the standard quantum limit using spin-squeezed states [1]. This approach, based on dipole-coupled spin systems, sheds light on experimentally demonstrating spin-squeezed states and utilizing them for quantum sensing and other quantum methodologies. In this talk, we discuss optimizing the efficiency of spin-squeezing generation by integrating our approach with optimized spin configurations and time-dependent controls, such as tailored pulse sequences. We systematically analyze how spin geometry—using spin rings, chains, triangular clusters, and 3D architectures—determines squeezing performance. By mapping the relationship between spatial arrangement and interaction topology, we establish quantitative design rules for synthesizing quantum sensor networks. Moreover, we consider Floquet engineering via time-periodic driving to enhance spin squeezing. For this study, we utilize both classical and quantum computational simulations. This work bridges quantum control theory and synthetic chemistry, providing experimentalists with concrete molecular targets for next-generation quantum sensing application.
*Funding: This work was supported by the National Science Foundation (CHE-2404463 and CHE-2004252 with partial co-funding from the Quantum Information Science program in the Division of Physics).
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Publication: 1. Y. Song, N. Hasan, S. Takahashi, Spin-squeezed state generation using dipole-coupled spins. Submitted
Presenters
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Nabiha Hasan
- University of Southern California