利用声子快速绝热通道冷却囚禁离子
宇宙学与河外天体物理
2024-03-05 v1
摘要
在量子电荷耦合器件（QCCD）计算机架构的近期演示中，电路时间主要由冷却过程主导。由于冷却离子参与度低，多离子晶体的某些运动模式所需的冷却时间比其他模式长几个数量级。在此，我们展示了一种称为声子快速绝热通道（phrap）的新技术，该技术通过在远短于直接冷却的时间尺度上相干交换选定模式的热布居数，从而避免了这一问题。类似于绝热快速通道，我们利用直流电场将这些慢冷却模式与快冷却模式进行准静态耦合。当晶体随后绝热地扫描通过由此产生的避免交叉点时，会导致近乎完全的声子布居数交换。我们在双离子晶体上演示了这一点，并展示了所有径向模式的间接基态冷却——与直接冷却相比速度提高了一个数量级。我们还展示了该技术对阱势和控制场波动的不敏感性，并发现即使起始温度高达 n~200，它仍能实现亚量子温度。
引用
@article{arxiv.2403.02314,
title = {Dark Energy Survey Year 3 results: likelihood-free, simulation-based $w$CDM inference with neural compression of weak-lensing map statistics},
author = {N. Jeffrey and L. Whiteway and M. Gatti and J. Williamson and J. Alsing and A. Porredon and J. Prat and C. Doux and B. Jain and C. Chang and T. -Y. Cheng and T. Kacprzak and P. Lemos and A. Alarcon and A. Amon and K. Bechtol and M. R. Becker and G. M. Bernstein and A. Campos and A. Carnero Rosell and R. Chen and A. Choi and J. DeRose and A. Drlica-Wagner and K. Eckert and S. Everett and A. Ferté and D. Gruen and R. A. Gruendl and K. Herner and M. Jarvis and J. McCullough and J. Myles and A. Navarro-Alsina and S. Pandey and M. Raveri and R. P. Rollins and E. S. Rykoff and C. Sánchez and L. F. Secco and I. Sevilla-Noarbe and E. Sheldon and T. Shin and M. A. Troxel and I. Tutusaus and T. N. Varga and B. Yanny and B. Yin and J. Zuntz and M. Aguena and S. S. Allam and O. Alves and D. Bacon and S. Bocquet and D. Brooks and L. N. da Costa and T. M. Davis and J. De Vicente and S. Desai and H. T. Diehl and I. Ferrero and J. Frieman and J. García-Bellido and E. Gaztanaga and G. Giannini and G. Gutierrez and S. R. Hinton and D. L. Hollowood and K. Honscheid and D. Huterer and D. J. James and O. Lahav and S. Lee and J. L. Marshall and J. Mena-Fernández and R. Miquel and A. Pieres and A. A. Plazas Malagón and A. Roodman and M. Sako and E. Sanchez and D. Sanchez Cid and M. Smith and E. Suchyta and M. E. C. Swanson and G. Tarle and D. L. Tucker and N. Weaverdyck and J. Weller and P. Wiseman and M. Yamamoto},
journal= {arXiv preprint arXiv:2403.02314},
year = {2024}
}
备注
19 pages, 15 figures, submitted to Monthly Notices of the Royal Astronomical Society