Professor Thomas Weiler and graduate fellow Chui Man Ho are suggesting it's a possibility, and doesn't defy the laws of physics. However, they're very clear to point out that this is just a theory, and it would only involve particles, not human beings.
"Our theory is a long shot," Weiler, who is a physics professor at Vanderbilt University, admitted to the school's research news department, "but it doesn't violate any laws of physics or experimental constraints."
The researchers propose that the Large Hadron Collider (LHC), a 17-mile long particle accelerator in Geneva, Switzerland, could be used to send a theoretical particle back or forward in time, according to LiveScience. That particle, the Higgs singlet, is purely theoretical at this point and is related to another highly theorized (and slightly more well-known) particle, the Higgs boson.
The goal of some experiments done at the LHC is to find the elusive Higgs boson particle. According to the original summary by Vanderbilt's research news department, Weiler and Ho's paper suggests that if the Higgs boson is discovered, the Higgs singlet will also be created.