The Physics of Time Travel:
ACCELERATION = TIME DIALATION
As pointed out earlier, acceleration will produce time dilation. This can be observed by the “twins paradox”. As one twin stays on Earth, the other twin in his accelerating spaceship experiences a slower passing of time. When he returns to Earth, he is noticeably younger than his twin who aged normally in Earth time. This type of “time travel” (should have been proven already on this worldline) with atomic clock experiments. With sufficient power, this type of time travel will only provide practical displacement in a future direction. This type of time travel is also isolated to a single worldline. You will not meet yourself.
GRAVITY = ACCELERATION
As Einstein pointed out with his STR, the effects of gravity and acceleration are the same. Therefore, you will experience the same time travel effects in the twin paradox by being close to a large gravity source. In the atomic clock experiments mentioned above, the reason there was a difference in time was not because the clock in the plane was moving, it was because the clock in the well was closer to the center of the Earth. Constant speed is not acceleration.
LARGE GRAVITY = STATIC BLACK HOLE
The next step is to find a large gravity source to use in your time machine. Static black holes provide this type of power. As one twin approaches the event horizon or edge of the black hole, the other twin will watch him as he appears to slow down. He will notice his twin’s watch run slower until it stops at the event horizon. The twin moving toward the horizon will notice none of this and see his watch running just fine. Although possible, a trip into a static black hole will not take you to another worldline and it’s one-way. The force of gravity will crush you.
ROTATING BLACK HOLE = DONUT-SHAPED SINGULARITY
Fortunately, most black holes are not static. They spin. Spinning black holes are often referred to as Kerr black holes. A Kerr black hole has two interesting properties. One, they have two event horizons and two, the singularity is not a point, it looks more like a donut. These odd properties also have a pronounced affect on the black hole’s gravity. There are vectors where you can approach the singularity without being crushed by gravity. (For those interested in seeing a graphic of a photon trip through a Kerr black hole, try here)
http://qso.lanl.gov/~bromley/nu_nofun.htmlDONUT-SHAPED SINGULARITY = PASSAGE INTO ALTERNATE WORLDLINE
Another other more interesting result of passing through a donut singularity is that you travel through time by passing into another universe or worldline. Please see Penrose diagrams for Kerr Black holes or you can examine the calculations of Frank Tipler.
So now the problem becomes….where do we find a donut-shaped singularity?
A PONDERING HAWKING = MICROSINGULARITY
Steven Hawking proposed the existence of microsingularities that were created in the big bang. They were probably about the size of a proton and disappeared over the years due to an effect of radiation evaporation. (Yes, black holes do emit energy.)
HIGH ENERGY PHYSICS = ARTIFICIAL MICROSINGULARITY
When I first started posting online a few months ago, I said that major breakthroughs in particle physics were around your corner. Soon, CERN will bring their big machine on line and they will be smashing very fast and high-energy particles together. One of the more odd and potentially dangerous items produced from this incease in energy will be microsingularities a fraction of the size of an electron. (for those who would like to follow the developments at CERN)
http://public.web.cern.ch/Public/Welcome.htmlARTIFICIAL MICROSINGULARITY = LOCALIZED KERR FIELD
Through trial and error, and although they are quite heavy, hot and capable of putting out a great deal of energy (300 – 500 megawatts), it’s discovered that these microsingularities can be electrified and captured. It is also interesting to note at this point that electrified singularities also have two event horizons. By spinning these various microsingularities, a localized Kerr field is created.
LOCALIZED KERR FIELD = TIPLER SINUSOID
By using two microsingularites in close proximity to each other, it is possible to create, manipulate and alter the Kerr fields to create a Tipler gravity sinusoid. This field can be adjusted, rotated and moved in order to simulate the movement of mass through a donut-shaped singularity and into an alternate world line. Thus, safe time travel.
