التفاصيل البيبلوغرافية
| العنوان: |
Multi-qubit gates and 'Schrödinger cat' states in an optical clock |
| المؤلفون: |
Cao, Alec, Eckner, William J., Lukin Yelin, Theodor, Young, Aaron W., Jandura, Sven, Yan, Lingfeng, Kim, Kyungtae, Pupillo, Guido, Ye, Jun, Darkwah Oppong, Nelson, Kaufman, Adam M. |
| بيانات النشر: |
arXiv |
| سنة النشر: |
2024 |
| المجموعة: |
Caltech Authors (California Institute of Technology) |
| مصطلحات موضوعية: |
Quantum Physics (quant-ph), Quantum Gases (cond-mat.quant-gas), Atomic Physics (physics.atom-ph), FOS: Physical sciences |
| الوصف: |
Many-particle entanglement is a key resource for achieving the fundamental precision limits of a quantum sensor. Optical atomic clocks, the current state-of-the-art in frequency precision, are a rapidly emerging area of focus for entanglement-enhanced metrology. Augmenting tweezer-based clocks featuring microscopic control and detection with the high-fidelity entangling gates developed for atom-array information processing offers a promising route towards leveraging highly entangled quantum states for improved optical clocks. Here we develop and employ a family of multi-qubit Rydberg gates to generate 'Schrödinger cat' states of the Greenberger-Horne-Zeilinger (GHZ) type with up to 9 optical clock qubits in a programmable atom array. In an atom-laser comparison at sufficiently short dark times, we demonstrate a fractional frequency instability below the standard quantum limit using GHZ states of up to 4 qubits. A key challenge to improving the optimal achievable clock precision with GHZ states is their reduced dynamic range. Towards overcoming this hurdle, we simultaneously prepare a cascade of varying-size GHZ states to perform unambiguous phase estimation over an extended interval. These results demonstrate key building blocks for approaching Heisenberg-limited scaling of optical atomic clock precision. ; We acknowledge earlier contributions to the experiment from M. A. Norcia and N. Schine as well as fruitful discussions with R. Kaubruegger and P. Zoller. The authors also wish to thank S. Lannig and A. M. Rey for careful readings of the manuscript and helpful comments. In addition, we thankfully acknowledge helpful technical discussions and contributions to the clock laser system from A. Aeppli, M. N. Frankel, J. Hur, D. Kedar, S. Lannig, B. Lewis, M. Miklos, W. R. Milner, Y. M. Tso, W. Warfield, Z. Hu, Z. Yao. This material is based upon work supported by the Army Research Office (W911NF-19-1-0149, W911NF-19-1-0223), the Air Force Office for Scientific Research (FA9550-19-1-0275), the National Science ... |
| نوع الوثيقة: |
report |
| اللغة: |
English |
| العلاقة: |
https://doi.org/10.48550/arxiv.2402.16289Test; oai:authors.library.caltech.edu:52d3w-r3f96 |
| DOI: |
10.48550/arxiv.2402.16289 |
| الإتاحة: |
https://doi.org/10.48550/arxiv.2402.16289Test |
| حقوق: |
info:eu-repo/semantics/openAccess ; No commercial reproduction, distribution, display or performance rights in this work are provided. |
| رقم الانضمام: |
edsbas.88DED4EF |
| قاعدة البيانات: |
BASE |
