As odd as it may sound, mental time-travel is actually far more plausible than the popular and streotypical H.G. Wells type of "time machine",
especially regarding modern physics.
The idea of mental time travel is not necessarily new and has been used in an array of popular science fiction and drama stories, movies, and
television shows. Some of these include:
1. Television's "Quantum Leap", wherein a time travel project dealing with deep-space probes, distant stars, and radioactive subatomic particles
allows it's head scientist to send signals within his brain's neurons and masons back and forth through time.
2. "Somewhere In Time", a masterfull film starring Christopher Reeve and based on the novel "Bid Time Return" by often "Twilight Zone" author
Richard Matheson, wherin the main character intentionally travels back in time via exhaustive self-hypnosis in order to meet a woman who has been in
love with him for decades.
3. Film's "The Butterfly Effect", wherin the main character has the inexplicable (and unexplainable) ability to rewind time based around the notes
of his own memory, and change the past.
4. "The Time-Traveller's Wife", a novel about a woman dealing with her husbands rare temporal disease, which bounces his memories around in
There are numerous other books, films, and teleplays on this topic, some of which are explained away as supernatural, and some that attempt to use
very scientific means to explain the plausability of such phenomenon.
My personal research on the topic deals mostly with aspects of the human brain. Primarily the temporal regions. As in the film "Memento", there are
numerous medical conditions which exist that can alter memory and the perception of time. These conditions can be thought of as a type of time travel.
If you combine that with certain theories about how the brian stores information (see the book "The Holographic Universe" by Michael Talbot), future
research may yet unveil a method for perfect recall of memory, which can be considered a type of time travel within your own mind (minus the actual
being able to change the past).
Another book to look at that includes a few mental time travel techniques is "Time Travel: A New Perspective" by J.H. Brennan.
From a physics perspective though, AT&T has been working with teleportation for years and has (supposedly) had limited success in teleporting mass in
the amount of a paper clip. In the far future, a combination of teleportation, brain mapping, and exotic subatomic particle collision may be able to
send small amounts of matter back in time.
Say, sending the neural pathways of a grown man into the brain of that same man when he is younger? Moving small amounts of energy and mass back in
time (like email messages and neurological signals) may be less complex and more energy-efficient than sending entire people back in time.
Purely science fiction at this point, but I'm working on a few books on the subject. Glad to know someone else out there has had similar daydreams.
But don't we all kinda wish we could go back then, knowing what we know now?