Retrieval of cavity-generated atomic spin squeezing after free-space release
| Autor: | Benjamin K. Malia, Julián Martínez-Rincón, Onur Hosten, Yunfan Wu, Rajiv Krishnakumar, Mark A. Kasevich |
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| Rok vydání: | 2020 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Quantum Physics Optical lattice Collective state FOS: Physical sciences Physics::Optics Free space 01 natural sciences 010305 fluids & plasmas law.invention Metrology law Optical cavity 0103 physical sciences Homogeneity (physics) Physics::Accelerator Physics Physics::Atomic Physics Atomic physics Quantum Physics (quant-ph) 010306 general physics Spin (physics) Squeezed coherent state |
| Zdroj: | Physical Review A. 102 |
| ISSN: | 2469-9934 2469-9926 |
| DOI: | 10.1103/physreva.102.012224 |
| Popis: | The compatibility of cavity-generated spin-squeezed atomic states with atom-interferometric sensors that require freely falling atoms is demonstrated. An ensemble of $500,000$ spin-squeezed atoms in a high-finesse optical cavity with near-uniform atom-cavity coupling is prepared, released into free space, recaptured in the cavity, and probed. Up to $\sim$10 dB of metrologically-relevant squeezing is retrieved for 700 microsecond free-fall times, and decaying levels of squeezing are realized for up to 3 millisecond free-fall times. The degradation of squeezing results from loss of atom-cavity coupling homogeneity between the initial squeezed state generation and final collective state read-out. A theoretical model is developed to quantify this degradation and this model is experimentally validated. |
| Databáze: | OpenAIRE |
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