Whenever a rational being hears about the TIME MACHINE he giggles .We all have considered that time machines are science fictions . They can only come true in our movies . But according to the scientists there are no laws of physics which prevents us from time traveling. 20 years ago any research on time machines would meant to be professional suicide , but now a days developing time machines is at the front lines of Science Research. In fact the great scientist Albert Einstein in his last days was searching for a way go achieve this . The world's first time machine would work on the basis of combining the the four dimensions together .By four dimension I mean 3 dimensions of space i.e the X-axis,the Y-axis & the Z-axis & 1 dimension of time i.e.minute ,seconds,hours,light years,etc .This idea originated from Einstein , according to him time and space are linked and together they constitute the space-time .
Recently I have viewed some articles and documentaries of Prof. Ronald.L.Mallet who is a professor of the university of conectikut in new york . He along with Chandra Roy published the first blue print of time machine . Now this time machine is going to be simple .Actually he is passing very powerful laser lights in weak gravitational fields causing a twisting of space and thus causing a twisting effect of time , since space and time are linked . Imagine space to be straight now due to the presence of laser lights it forms a loop joining end to end , similarly time also forms loop where one end is the past the middle is the present and the other end is the future .Now if a particle is in that loop then it could go to the past then to the future and again come back to the present.I know that this idea of space-time is not easy to grasp but this is the key principle in building World's first time machine.
Another thing I would like to add is that the World's first time machine would not be for the humans but for the subatomic particles.