Darby
Timekeeper
Did Nikola Tesla ever experimented on time travel does he have any theories?
No. Tesla was brilliant in his own field of electrical engineering.
His ventures into theoretical physics revealed his lack of education and understanding of advanced physics. For example, he never accepted that subatomic particles are composed of smaller particles (quarks) or that electrons are anything more than non-existent laboratory fantasies. He was firmly cast into a 19th Century Classical Newtonian understanding of physics. His incomplete university education took place in the 1870's (he dropped out) decades before Special Relativity, General Relativity, quantum mechanics and modern atomic theory were published. Brilliant as he was he never kept up with the literature and he never completed his undergraduate degree.
And please don't listen to folks that say a university education isn't necessary for a theoretical physicist. An undergraduate degree (BS degree) is just the beginning. Those are introductory courses. A full PhD plus Post-Doc work and Research Fellowships are necessary to understand the field. Remember, Tesla was active during the singular period of the most profound advances in physics in human history - 1880 to 1943. Lacking the educational foundations in newly advancing physics shut him off from fully participating in those advances. It's a shame but true. With a proper education his contributions could have been enormous.