I don't think time travel is realistic but teleportation could be. See Toshiba's patent application: # 20130322873 items #14, 21... http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=1&f=G&l=50&d=PG01&p=1&S1=((%22quantum+dot%22.CLM.)+AND+(%22toshiba%22.AS.))&OS=ACLM/%22quantum+dot%22+AND+AN/%22toshiba%22&RS=(ACLM/%22quantum+dot%22+AND+AN/%22toshiba%22) SYSTEM AND METHOD FOR QUANTUM TELEPORTATION