Efficiently measuring $d$-wave pairing and beyond in quantum gas microscopes

• URL: http://arxiv.org/abs/2412.13186v1
• Date: Tue, 17 Dec 2024 18:58:32 GMT
• Title: Efficiently measuring $d$-wave pairing and beyond in quantum gas microscopes
• Authors: Daniel K. Mark, Hong-Ye Hu, Joyce Kwan, Christian Kokail, Soonwon Choi, Susanne F. Yelin,
• Abstract summary: We introduce a protocol for measuring a broad class of observables in fermionic quantum gas microscopes. The protocol only requires global controls followed by site-resolved particle number measurements. We further optimize our pulses for robustness to experimental imperfections such as lattice inhomogeneity.
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• Abstract: Understanding the mechanism of high-temperature superconductivity is among the most important problems in physics, for which quantum simulation can provide new insights. However, it remains challenging to characterize superconductivity in existing cold-atom quantum simulation platforms. Here, we introduce a protocol for measuring a broad class of observables in fermionic quantum gas microscopes, including long-range superconducting pairing correlations (after a repulsive-to-attractive mapping). The protocol only requires global controls followed by site-resolved particle number measurements -- capabilities that have been already demonstrated in multiple experiments -- and is designed by analyzing the Hilbert-space structure of dimers of two sites. The protocol is sample efficient and we further optimize our pulses for robustness to experimental imperfections such as lattice inhomogeneity. Our work introduces a general tool for manipulating quantum states on optical lattices, enhancing their ability to tackle problems such as that of high-temperature superconductivity.

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