Abstract
We examine the time-dependent squeezing of fluctuations associated with the atomic coherent state of the SU( 2) Lie algebra. Based on the exact solutions for a non-dissipative SU( 2) system, regions of squeezing and its symmetric/asymmetric patterns are investigated in the cases of weak and strong coupling and for the resonance condition. For a spontaneously damped two-level atom, transient squeezing occurs in the atomic polarization components with initial atomic coherent state |θ, φ� , with asymmetric structure with respect to the state-of-zero atomic inversion. The rapidly vanishing squeezed regions for π 2 <θ < πare accompanied by entropy reduction.
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