Research Article
Stability of the Universe Model Coupled with Phantom and Tachyon Fields
Table 4
Phase Space Analysis of Tachyon Coupled System with
.
| | Ranges of and for Critical Points | Stability | | | Acceleration |
| | | | | |
| | , | Saddle | -2.006 | -2.51 | Yes |
| | , , | Unstable | -2.006 | -2.51 | Yes |
| | , , | Stable | -4.75 | -6.625 | Yes |
| | , | Stable | -4.75 | -6.625 | Yes |
| | | | | |
| | , | Unstable | -2.006 | -2.51 | Yes |
| | , , | Saddle | -2.006 | -2.51 | Yes |
| | , , | Saddle | -4.75 | -6.625 | Yes |
| | , | Saddle | -4.75 | -6.625 | Yes |
| | | | | |
| | , | Stable | -1 | -1 | Yes |
| | , , | Saddle | -1 | -1 | Yes |
| | , , | Saddle | -1 | -1 | Yes |
| | , | Saddle | -1 | -1 | Yes |
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