Abstract
We provide a framework for understanding recent experiments on squeezing of a collective atomic pseudospin,
induced by a homodyne measurement on off-resonant probe light interrogating the atoms. The detection of
light decimates the atomic state distribution and we discuss the conditions under which the resulting reduced
quantum fluctuations are metrologically relevant. In particular, we consider a dual probe scheme which benefits
from a cancelation of classical common mode noise sources such that quantum fluctuations from light and
atoms are the main contributions to the detected signal.
Original language | English |
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Journal | Journal of Modern Optics |
Volume | 56 |
Issue number | 18-19 |
Pages (from-to) | 1993–1998 |
ISSN | 0950-0340 |
DOIs | |
Publication status | Published - 2009 |
Externally published | Yes |
Keywords
- Projection noise
- Quantum noise squeezing
- Quantum non-demolition measurement