Date: Mar 14, 2013 3:45 AM
Author: Pentcho Valev
Subject: EINSTEINIANA: REVIVING THE OLD MONEY-SPINNER
"Albert Einstein is probably the most well-known scientific genius. His creative ability allowed him to dream of new physics and create scientific revolutions, including his masterpiece, the theory of general relativity. (...) Today, a window of opportunity is beginning to open for those of us in the physics community who wish to communicate Einstein's vision to the public. Two years from now, in 2015, we will mark the 100th anniversary of the year Einstein discovered general relativity. The Celebrating Einstein event, launched in anticipation of the centennial, tells the story of Einstein to the world and shares the excitement of Einstein's theory. To organize the project, we're working with artists, musicians, composers, scientists, dancers, filmmakers, historians, architects and educators on a series of interconnected events designed to engage the general public. Celebrating Einstein begins in 2013 with a series of free public events in Bozeman, Mont., but everyone in the world - including you - can join the celebration. (...) Einstein devised a completely new description of gravity. First, he realized that objects in the universe exist in three dimensions of space and one of time. He then combined these into a four-dimensional spacetime."
Spacetime was just an absurd consequence of Einstein's 1905 false light postulate. Nowadays most Einsteinians know that and, unlike Einsteinians involved in the "Celebrating Einstein" project, extract career and money from debunking spacetime (the NEW money-spinner):
"Einstein introduced a new notion of time, more radical than even he at first realized. In fact, the view of time that Einstein adopted was first articulated by his onetime math teacher in a famous lecture delivered one century ago. That lecture, by the German mathematician Hermann Minkowski, established a new arena for the presentation of physics, a new vision of the nature of reality redefining the mathematics of existence. The lecture was titled Space and Time, and it introduced to the world the marriage of the two, now known as spacetime. It was a good marriage, but lately physicists passion for spacetime has begun to diminish. And some are starting to whisper about possible grounds for divorce. (...) Physicists of the 21st century therefore face the task of finding the true reality obscured by the spacetime mirage."
Aspects of Time, Julian Barbour, Warwick, August 24th 2011: "Was Spacetime Glorious Historical Accident? (...) ABSOLUTE SIMULTANEITY RESTORED!"
"Many physicists argue that time is an illusion. Lee Smolin begs to differ. (...) Smolin wishes to hold on to the reality of time. But to do so, he must overcome a major hurdle: General and special relativity seem to imply the opposite. In the classical Newtonian view, physics operated according to the ticking of an invisible universal clock. But Einstein threw out that master clock when, in his theory of special relativity, he argued that no two events are truly simultaneous unless they are causally related. If simultaneity - the notion of "now" - is relative, the universal clock must be a fiction, and time itself a proxy for the movement and change of objects in the universe. Time is literally written out of the equation. Although he has spent much of his career exploring the facets of a "timeless" universe, Smolin has become convinced that this is "deeply wrong," he says. He now believes that time is more than just a useful approximation, that it is as real as our guts tell us it is - more real, in fact, than space itself. The notion of a "real and global time" is the starting hypothesis for Smolin's new work, which he will undertake this year with two graduate students supported by a $47,500 grant from FQXi."
"Now Horava, at the University of California, Berkeley, claims to have found a solution that is both simple and - in physics terms, at least - sacrilegious. To make the two theories gel, he argues, you need to throw out Einstein's tenet that time is always relative, never absolute. Horava's controversial idea is based on the fact that the description of space and time in the quantum and relativistic worlds are in conflict. Quantum theory harks back to the Newtonian concept that time is absolute - an impassive backdrop against which events take place. In contrast, general relativity tells us that space and time are fundamentally intertwined; two events can only be marked relative to one another, and not relative to an absolute background clock. Einstein's subjective notion of time is well accepted and is the hallmark of Lorentz invariance, the property that lies at the heart of general relativity. "Lorentz invariance is not actually fundamental to a theory of quantum gravity," says Horava. "But the problem so far has been that many cosmologists are wedded to the concept."
"What is time? Is our perception of time passing an illusion which hides a deeper, timeless reality? Or is it real, indeed, the most real aspect of our experience of the world? Einstein said that, "the distinction between past, present, and future is only a stubbornly persistent illusion," and many contemporary theorists agree that time emerges from a more fundamental timeless quantum universe. But in recent cosmological speculation, this timeless picture of nature seems to have reached a dead end, populated by infinite numbers of imagined unobservable universes. In this talk, Lee Smolin explains why he changed his mind about the nature of time. Like many fellow theorists, he used to believe time is an illusion, but he now embraces the view that time is real..."