No, traveling to Alpha Centauri and back again in two seconds would not result in a return to Earth in 2008 or any other specific time frame. This scenario involves faster-than-light travel, which is currently not possible according to our understanding of physics.
According to our current knowledge, the speed of light is the cosmic speed limit, and any object with mass cannot reach or exceed the speed of light. Alpha Centauri, the closest star system to our solar system, is located about 4.37 light-years away. This means that light from Alpha Centauri takes approximately 4.37 years to reach Earth.
If you were able to travel to Alpha Centauri and back in just two seconds, it would imply a speed significantly greater than the speed of light. However, such speeds are not supported by our current understanding of physics, and no evidence or technology exists to suggest otherwise.
Therefore, the notion of returning to Earth in 2008 or any specific time frame after traveling to Alpha Centauri and back in two seconds is not consistent with our understanding of the laws of physics.