Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2408.16128 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866916760074059776 |
|---|---|
| author | de Neeve, Brennan Nguyen, Thanh-Long Ferk, Alexander Behrle, Tanja Lancellotti, Francesco Simoni, Matteo Welte, Stephan Home, Jonathan |
| author_facet | de Neeve, Brennan Nguyen, Thanh-Long Ferk, Alexander Behrle, Tanja Lancellotti, Francesco Simoni, Matteo Welte, Stephan Home, Jonathan |
| contents | We propose and experimentally demonstrate a method for laser cooling an oscillator based on sequences of spin-state-dependent displacements followed by spin repumping. For a thermal state with mean occupation $\bar{n}\gg 1$ the method attains a reduction to 0.632 of the initial thermal oscillator occupation for two repumps of the two-level spin state. This is within a factor of 2.53 of the optimum that might be expected due to the reduction of the oscillator entropy by $2 \ln(2)$. We show that the method, which is based on encoding the value of the modular-variable of the oscillator into the spin, has a simple semi-classical description in terms of a Bayesian update. We demonstrate the method experimentally using the internal and motional states of a single trapped ion. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_16128 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Modular variable laser cooling for efficient entropy extraction de Neeve, Brennan Nguyen, Thanh-Long Ferk, Alexander Behrle, Tanja Lancellotti, Francesco Simoni, Matteo Welte, Stephan Home, Jonathan Quantum Physics We propose and experimentally demonstrate a method for laser cooling an oscillator based on sequences of spin-state-dependent displacements followed by spin repumping. For a thermal state with mean occupation $\bar{n}\gg 1$ the method attains a reduction to 0.632 of the initial thermal oscillator occupation for two repumps of the two-level spin state. This is within a factor of 2.53 of the optimum that might be expected due to the reduction of the oscillator entropy by $2 \ln(2)$. We show that the method, which is based on encoding the value of the modular-variable of the oscillator into the spin, has a simple semi-classical description in terms of a Bayesian update. We demonstrate the method experimentally using the internal and motional states of a single trapped ion. |
| title | Modular variable laser cooling for efficient entropy extraction |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2408.16128 |