Open Quantum Dynamics of Mesoscopic Bose-Einstein ... - Physics

4. Continuously monitored Bose condensates: quasiprobability distributionsFigure 4.6: Contour plots of the atomic Q function in polar coordinates, with the initial state∣ j, 0 , for various measurement strengths, and with no interatomic interactions (Θ = 0.0) or〉ytunnelling (Ω =0.0). The initial distribution is in (a), while (b), (c) and (d) are the contours attime t =50s for weak (ΓN 2 = .16s −1 ), medium (ΓN 2 =16s −1 ) and strong (ΓN 2 = 1600s −1 )measurement strengths respectively.(a)1(b)0.80.8θ/π0.60.4θ/π0.60.40.20.20−1 −0.5 0 0.5φ/π1(c)0−1 −0.5 0 0.5 1φ/π1(d)0.80.8θ/π0.60.4θ/π0.60.40.20.20−1 −0.5 0 0.5 1φ/π0−1 −0.5 0 0.5 1φ/π90