Itzhak Bars, a theoretical physicist at the University of Southern California, thinks these hypotheses are missing a crucial ingredient: an extra dimension of time. By adding a second dimension of time and a fourth dimension of space to Einstein’s standard space-time, Bars has come up with a new model providing “additional information that remained hidden in previous formulations” of physics, including current versions of M-theory. Such a model could better explain “how nature works,” he says.
Physicists had never added a second dimension of time to their models because it opens the possibility of traveling back in time and introduces negative probabilities and other scenarios that seem nonsensical. In his equations Bars has solved these problems with a new symmetry that treats an object’s position and its momentum as interchangeable at any given instant.
Does this mean we could actually experience a second dimension of time? “Yes,” Bars says, “but only indirectly,” by thinking of the world around us as many shadows that look different depending on the perspective of the light source. “The predicted relations among the different shadows contain most of the information about the extra dimensions,” he explains. Next, Bars and his team are developing tests for two-time physics and investigating how to apply the theory to all the natural forces, including gravity. Adding two-time physics to M-theory, he says, should help us close in on “the fundamental theory that so far has eluded all of us.”
Source : Discovery Magazine