Dynamically decoupled three-body interactions with applications to interaction-based quantum metrology
| Autor: | Mahmud, K. W., Tiesinga, E., Johnson, P. R. |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Phys Rev A 90, 041602 (R) (2014) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevA.90.041602 |
| Popis: | We propose a stroboscopic method to dynamically decouple the effects of two-body atom-atom interactions for ultracold atoms, and realize a system dominated by elastic three-body interactions. Using this method, we show that it is possible to achieve the optimal scaling behavior predicted for interaction-based quantum metrology with three-body interactions. Specifically, we show that for ultracold atoms quenched in an optical lattice, we can measure the three-body interaction strength with a precision proportional to ${\bar n}^{-5/2}$ using homodyne quadrature interferometry, and ${\bar n}^{-7/4}$ using conventional collapse-and-revival techniques, where ${\bar n}$ is the mean number of atoms per lattice site. Both precision scalings surpass the nonlinear scaling of ${\bar n}^{-3/2}$, the best so far achieved or proposed with a physical system. Our method of achieving a decoupled three-body interacting system may also have applications in the creation of exotic three-body states and phases. Comment: 5 pages, 4 figures |
| Databáze: | arXiv |
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