Showing posts with label General relativity. Show all posts
Showing posts with label General relativity. Show all posts

Saturday, April 3, 2010

Intention & Retrocausality

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Cause and effect is pretty easy to understand. I pick up a remote control, press the power button and my TV turns on. Me pressing the power button is the cause, the TV turning on is the effect. We all learned about it in grade school.

But what if that were reversed? What if my TV turned on, and that caused me in the past to press the power button on the remote control? It goes against everything we think we know about the way the universe works, but that is the essence of the theory of retrocausality. The effect
creates the cause. It sounds like something straight out of the pages of science fiction, but many scientists today believe that retrocausality could be a real phenomenon.

From wikipedia: Retrocausality (also called retro-causation, backward causation and similar terms) is any of several hypothetical phenomena or processes that reverse causality, allowing an effect to occur before its cause.

According to Paul March from a Talk Polywell comment: Dr. Cramer's retrocausal experiment should be completed by the end of this year. And if verified it would buttress Dr. Woodward's M-E (Mach Effect) arguments and provide a path to finally merging GRT (General relativity) with QM (Quantum Mechanics).

A 36 page presentation from 2007: The UW Nonlocal Quantum Communication Experiment by John Cramer

Entanglement: The separated but “entangled” parts of the same quantum system can only be described by referencing the state of other part.
The possible outcomes of measurement M2 depend of the results of measurement M1, and vice versa. This is usually a consequence of conservation laws.
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Nonlocality: This “connectedness” between the separated system parts is called quantum nonlocality. It should act even of the system parts are separated by light years. Einstein called this “spooky actions at a distance.”



Physicist York Dobyns explains retrocausality -- how human intentions affect the past; discusses Cal Tech Physicist Kip Thorne's theories of wormholes on the fabric of space and time; and touches upon some of the strange implications of our current understanding of quantum mechanics. Interview by Tom Munnecke at the American Association for the Advancement of Science at University of San Diego on June 23, 2006.


York Dobyns earned his PhD in physics at Princeton and is the Analytical Coordinator for the Princeton Engineering Anomalies Research (PEAR) program.
For more information, visit: http://www.princeton.edu/~pear/

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A Brief History of Retrocausality Experiments: 35 years ago, Helmut Schmidt pioneered studies on the effects of human intention on random event generators (REGs) — machines which generate a string of qubits that can be imagined as a stream of coins flipping in the air. Using REG data which were prerecorded and unobserved, Schmidt showed that his subjects were able to influence selected heads or tails events which had occurred up to six days earlier. More recently, Brenda Dunne and Robert Jahn (PEAR) conducted close to 87,000 similar (and statistically significant) REG/RPK experiments. Elmar Grubers retrocausation experiments (PK Effects on Pre-Recorded Group Behaviour of Living Systems European Journal of Parapsychology, 3, 1980, 167-75) showed that conscious intention can seemingly influence the past activity of both animals and humans. In one of the human trials, the effect size was 0.74, which is over twenty-three times greater than the effect size of most prescription drugs (0.032). These studies — and numerous others involving everything from steel marbles to human skin conductance and heart rate — have shown the apparent effect that conscious intent has on altering events which have already occurred... Or, at least, events which have already occurred from our commonly held perspective.




Part 2: http://www.youtube.com/watch?v=bYOaQQUWk7s

Part 3: http://www.youtube.com/watch?v=AAUTs-1ukrY



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TIME TRAVEL

A science program about the possiblilty of Time Travel with Dr David Deutsch.

What remains of the killing-your-earlier-self paradox in general relativistic time travel worlds is the fact that in some cases the states on edgeless spacelike surfaces are ‘overconstrained’, so that one has less than the usual freedom in specifying conditions on such a surface, given the time-travel structure, and in some cases such states are ‘underconstrained’, so that states on edgeless space-like surfaces do not determine what happens elsewhere in the way that they usually do, given the time travel structure. There can also be mixtures of those two types of cases. The extent to which states are overconstrained and/or underconstrained in realistic models is as yet unclear, though it would be very surprising if neither obtained. The extant literature has primarily focused on the problem of overconstraint, since that, often, either is regarded as a metaphysical obstacle to the possibility time travel, or as an epistemological obstacle to the plausibility of time travel in our world. While it is true that our world would be quite different from the way we normally think it is if states were overconstrained, underconstraint seems at least as bizarre as overconstraint. Nonetheless, neither directly rules out the possibility of time travel.













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Monday, January 11, 2010

Through Time

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Time travel in theory

Some theories, most notably special and general relativity, suggest that suitable geometries of spacetime, or specific types of motion in space, might allow time travel into the past and future if these geometries or motions are possible.[10] In technical papers, physicists generally avoid the commonplace language of "moving" or "traveling" through time ('movement' normally refers only to a change in spatial position as the time coordinate is varied), and instead discuss the possibility of closed timelike curves, which are worldlines that form closed loops in spacetime, allowing objects to return to their own past. There are known to be solutions to the equations of general relativity that describe spacetimes which contain closed timelike curves (such as Gödel spacetime), but the physical plausibility of these solutions is uncertain.

Physicists take for granted that if one were to move away from the Earth at relativistic velocities and return, more time would have passed on Earth than for the traveler, so in this sense it is accepted that relativity allows "travel into the future" (although according to relativity there is no single objective answer to how much time has 'really' passed between the departure and the return). On the other hand, many in the scientific community believe that backwards time travel is highly unlikely. Any theory which would allow time travel would require that issues of causality be resolved. The classic example of a problem involving causality is the "grandfather paradox": what if one were to go back in time and kill one's own grandfather before one's father was conceived? But some scientists believe that paradoxes can be avoided, either by appealing to the Novikov self-consistency principle or to the notion of branching parallel universes.

Watch Time Travel in Educational | View More Free Videos Online at Veoh.com

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Other Dimensional Life



Are there extra dimensions of space?

The Tevatron
At Fermilab’s Tevatron, physicists study such exotic phenomena as extra dimensions, paving the way for scientific discoveries.

The revolutionary concept of string theory is a bold realization of Einstein's dream of an ultimate explanation for everything from the tiniest quanta of particle physics to the cosmos itself. String theory unifies physics by producing all known forces and particles as

different vibrations of a single substance called superstrings. String theory brings quantum consistency to physics with an elegant mathematical construct that appears to be unique.

Do superstrings exist?

The strings themselves are probably too tiny to observe directly, but string theory makes a number of testable predictions. It implies supersymmetry and predicts seven undiscovered dimensions of space, dimensions that would give rise to much of the mysterious complexity of particle physics. Testing the validity of string theory requires searching for the extra dimensions and exploring their properties. How many are there? What are their shapes and sizes? How and why are they hidden? And what are the new particles associated with the extra dimensions?

to travel from one parallel universe to an adjacent one. A wormhole which connects (usually closed) universes is called a Schwarzschild wormhole. In string theory, a wormhole has been envisioned to

connect two D-branes, where the mouths are attached to the branes and are connected by a flux tube. If a brane is in fact a universe, this would make perfect sense. Also wormholes are believed to be a part of space-time foam. There are two main types of wormholes: Lorentzian wormholes and Euclidean wormholes.

..Lorentzian wormholes are a product of general relativity and semi-classical gravity, but Euclidean wormholes are studied in particle physics. Interestingly, traversable wormholes (a special kind of Lorentzian wormhole) could possibly allow a human to travel from one side of the wormhole to the other. It would certainly allow a cross transmission of EMF or other forms of pure energy.

..Lorentzian wormholes are not excluded within the framework of general relativity, but the physical plausibility of their existence has remained elusive. It is also unknown whether a theory of quantum gravity, merging general relativity with quantum mechanics, would still allow them, but I suspect they would. Most of the accepted solutions of general relativity which allow for traversable wormholes require the existence of exotic matter, a theoretical substance which would have to have a negative energy density. However, it has not been mathematically proven that this is an absolute requirement for traversable wormholes, nor has it been established that exotic matter cannot exist.

Exotic matter is a hypothetical concept of particle physics. It covers any material which violates one or more classical conditions or is not made of known baryonic particles. Such materials would possess qualities like negative mass or being repelled rather than attracted by gravity. The closest known real representative of exotic matter is a region of pseudo-negative pressure density produced by the Casimir effect. In physics, the Casimir effect and the Casimir-Polder force are physical forces arising from a quantized field. The typical example is of two uncharged metallic plates in a vacuum, placed a few micrometers apart, without any external electromagnetic field.



Scientists discuss what sort of life could be found in the eleventh dimension. With talk of world of lightning bolts, electricity, unstable atoms and more, this video from BBC show 'Parallel Universe' is full of mind-bending theories.



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