Research Article

Stability of the Universe Model Coupled with Phantom and Tachyon Fields

Table 3

Phase Space Analysis for .

Ranges of and for Critical PointsStabilityAcceleration


, , Stable-14.18-2.16Yes

, , Saddle-14.18-2.16Yes

, , Unstable0.1284.86No

, Unstable0.1284.86No


, Stable2.064.22No

, , Stable2.064.22No

, , Unstable0.17926.46No

, Unstable0.17926.46No


, , Saddle57.94-2.62Yes

, , Saddle57.94-2.62Yes

, , Saddle-1.504-3.503Yes

, Saddle-1.504-3.503Yes