Research Article
Stability of the Universe Model Coupled with Phantom and Tachyon Fields
Table 1
Phase Space Analysis for the Phantom Coupled System with
.
| Ranges of and for Critical Points | Stability | | | Acceleration |
| | | | | |
| , | Stable | -6.41 | -1.87 | Yes |
| , | Stable | -3.38 | -0.73 | Yes |
| , | Unstable | -1.18 | -0.003 | Yes |
| , | Saddle | -3.92 | -4.27 | Yes |
| | | | | |
| , | Stable | 1.301 | 1.096 | No |
| , | Stable | -1.67 | -1.23 | Yes |
| , | Unstable | -1.69 | -1.84 | Yes |
| , | Unstable | 1.3 | 6.8 | No |
| | | | | |
| , | Saddle | 2.85 | 61.76 | No |
| , | Saddle | -2.306 | -1.383 | Yes |
| , | Saddle | -11.57 | -5.56 | Yes |
| , | Stable | 2.16 | 46.25 | No |
| | | | | |
| , | Stable | 1.11 | 0.72 | No |
| , | Saddle | -301.77 | -2.49 | Yes |
| , | Saddle | -194.81 | -6.54 | Yes |
| , | Saddle | 1.42 | 8.003 | No |
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