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arXiv 2408.12640cond-mat.quant-gasphysics.atom-phquant-ph
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光学腔内费米超流体量子模拟器中的时间分辨配对能隙光谱学

Time-resolved pairing gap spectroscopy in a quantum simulator of fermionic superfluidity inside an optical cavity

Dylan J. Young, Eric Yilun Song, Anjun Chu, Diego Barberena, Zhijing Niu, Vera M. Schäfer, Robert J. Lewis-Swan, Ana Maria Rey, James K. Thompson

AI总结:

本研究利用高精细度腔中激光冷却的锶原子模拟射频光谱学,通过原子的多能级结构研究Cooper对破裂,区分了BCS配对能隙与谱隙,并验证了谱隙对化学势的依赖性。

摘要:

我们使用高精细度腔中的一团激光冷却锶原子,干净地模拟了在简并冷气体的费米超流体BEC-BCS物理研究中采用的射频光谱学技术。在此,我们利用原子的多能级内部结构来研究该系统中Cooper对破裂的物理过程。借此,我们使用非破坏性读出技术观察并区分了两种不同多体能隙的特性,即BCS配对能隙和谱隙。我们发现后者依赖于内部原子态的布居数,反映了费米超流体中预测的化学势依赖性。这项工作为在腔QED模拟器中更充分地利用原子丰富的内部结构来研究类似系统以及尚未实现的更奇异态开辟了道路。

英文摘要:

We use an ensemble of laser-cooled strontium atoms in a high-finesse cavity to cleanly emulate the technique of rf spectroscopy employed in studies of BEC-BCS physics in fermionic superfluids of degenerate cold gases. Here, we leverage the multilevel internal structure of the atoms to study the physics of Cooper pair breaking in this system. In doing so, we observe and distinguish the properties of two distinct many-body gaps, the BCS pairing gap and the spectral gap, using nondestructive readout techniques. The latter is found to depend on the populations of the internal atomic states, reflecting the chemical potential dependence predicted in fermionic superfluids. This work opens the path for more fully exploiting the rich internal structure of atoms in cavity QED emulators to study both analogous systems and also more exotic states yet to be realized.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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