SQUEEZING IN RESONANCE FLUORESCENCE AND SCHRODINGERS UNCERTAINTY RELATION

Citation
Hf. Arnoldus et Tf. George, SQUEEZING IN RESONANCE FLUORESCENCE AND SCHRODINGERS UNCERTAINTY RELATION, Physica. A, 222(1-4), 1995, pp. 330-346
Citations number
41
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
ISSN journal
0378-4371
Volume
222
Issue
1-4
Year of publication
1995
Pages
330 - 346
Database
ISI
SICI code
0378-4371(1995)222:1-4<330:SIRFAS>2.0.ZU;2-T
Abstract
Resonance fluorescence can exhibit squeezing in its quadrature compone nts. Historically, this squeezing is defined with respect to Heisenber g's uncertainty relation, but when the lower limit on the uncertainty product becomes state dependent, this concept becomes rather artificia l. Schrodinger's uncertainty relation sets a higher lower bound on the uncertainty product when the two observables are correlated. In the s teady state both limits are nearly equal, but for pulsed excitation th ey can differ considerably. It is shown that after excitation with a p i/2 or pi pulse, the fluorescence is never squeezed, The squeezing is optimum for a pi/3 or 2 pi/3 pulse, and is a factor of two better than for the best case in the steady state. If the inversion is zero after the pulse, then the fluctuations in the quadrature field are consider ably below the Schrodinger limit, but the field is never squeezed belo w the Heisenberg limit.