Quantum back-action in spinor condensate magnetometry
Quantum Physics
2015-06-12 v1 Quantum Gases
Abstract
We provide a theoretical treatment of the quantum backaction of Larmor frequency measurements on a spinor Bose-Einstein condensate by an off-resonant light field. Two main results are presented; the first is a "quantum jump" operator description that reflects the abrupt change in the spin state of the atoms when a single photon is counted at a photodiode. The second is the derivation of a conditional stochastic master equation relating the evolution of the condensate density matrix to the measurement record. We comment on applications of this formalism to metrology and many-body studies.
Keywords
Cite
@article{arxiv.1211.2870,
title = {Quantum back-action in spinor condensate magnetometry},
author = {S. K. Steinke and S. Singh and P. Meystre and K. C. Schwab and M. Vengalattore},
journal= {arXiv preprint arXiv:1211.2870},
year = {2015}
}
Comments
4 pages + references, 2 figures, submitted to PRL