Abstract
We demonstrate spin squeezing in a room temperature ensemble of
1012 Cesium atoms using their internal structure,
where the necessary entanglement is created between nuclear and
electronic spins of each individual atom. This state provides
improvement in measurement sensitivity beyond the standard quantum
limit for quantum memory experiments and applications in quantum
metrology and is thus a complementary alternative to spin
squeezing obtained via inter-atom entanglement. Squeezing of the
collective spin is verified by quantum state tomography.
1012 Cesium atoms using their internal structure,
where the necessary entanglement is created between nuclear and
electronic spins of each individual atom. This state provides
improvement in measurement sensitivity beyond the standard quantum
limit for quantum memory experiments and applications in quantum
metrology and is thus a complementary alternative to spin
squeezing obtained via inter-atom entanglement. Squeezing of the
collective spin is verified by quantum state tomography.
| Original language | English |
|---|---|
| Journal | Physical Review Letters |
| Volume | 101 |
| Issue number | 7 |
| Pages (from-to) | 073601 |
| Number of pages | 4 |
| ISSN | 0031-9007 |
| DOIs | |
| Publication status | Published - 2008 |