| Автор | L K Thomsen |
| Автор | S Mancini |
| Автор | H M Wiseman |
| Дата выпуска | 2002-12-14 |
| dc.description | We discuss the theory and experimental considerations of a quantum feedback scheme for producing deterministically reproducible spin squeezing. Continuous nondemolition atom number measurement from monitoring a probe field conditionally squeezes the sample. Simultaneous feedback of the measurement results controls the quantum state such that the squeezing becomes unconditional. We find that for very strong cavity coupling and a limited number of atoms, the theoretical squeezing approaches the Heisenberg limit. Strong squeezing will still be produced at weaker coupling and even in free space (thus presenting a simple experimental test for quantum feedback). The measurement and feedback can be stopped at any time, thereby freezing the sample with a desired amount of squeezing. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Continuous quantum nondemolition feedback and unconditional atomic spin squeezing |
| Тип | paper |
| DOI | 10.1088/0953-4075/35/23/316 |
| Electronic ISSN | 1361-6455 |
| Print ISSN | 0953-4075 |
| Журнал | Journal of Physics B: Atomic, Molecular and Optical Physics |
| Том | 35 |
| Первая страница | 4937 |
| Последняя страница | 4952 |
| Выпуск | 23 |
