Quantum entanglement isn't only spooky, you can't avoid it Quantum entanglement is the key to quantum computing, cryptography, and numerous other real-world applications of quantum mechanics. It is also one of the strangest phenomena in the Universe, overcoming barriers of space and time and knitting the entire cosmos into an integrated whole. Scientists have long thought that entanglement between two particles was a rare and fleeting phenomenon, so delicate that exposure of the particles to their surroundings would quickly destroy this linkage. Now mathematicians at Case Western University have shown that entanglement between parts of large systems is the norm, rather than being a rare and short-lived relationship. Entanglement is one of the strangest predictions of quantum mechanics. Two objects are entangled if their physical properties are undefined but correlated, even when the two objects are separated by a large distance. Entanglement is clearly subtle, but how common is it in the real world of macroscopic objects?
Simulations back up theory that Universe is a hologram Artist's impression by Markus Gann/Shutterstock At a black hole, Albert Einstein's theory of gravity apparently clashes with quantum physics, but that conflict could be solved if the Universe were a holographic projection. A team of physicists has provided some of the clearest evidence yet that our Universe could be just one big projection. In 1997, theoretical physicist Juan Maldacena proposed1 that an audacious model of the Universe in which gravity arises from infinitesimally thin, vibrating strings could be reinterpreted in terms of well-established physics. The mathematically intricate world of strings, which exist in nine dimensions of space plus one of time, would be merely a hologram: the real action would play out in a simpler, flatter cosmos where there is no gravity. “It seems to be a correct computation,” says Maldacena, who is now at the Institute for Advanced Study in Princeton, New Jersey and who did not contribute to the team's work.
Quantum black hole study opens bridge to another universe Physicists have long thought that the singularities associated with gravity (like the inside of a black hole) should vanish in a quantum theory of gravity. It now appears that this may indeed be the case. Researchers in Uruguay and Louisiana have just published a description of a quantum black hole using loop quantum gravity in which the predictions of physics-ending singularities vanish, and are replaced by bridges to another universe. View all Singularities, such as the infinitely strong crushing forces at the center of a black hole, in a physical theory are bad. Satellite orbiting Earth is guided by the spacetime curvature generated by the Earth's mass (Photo: NASA) General relativity has been summed up by the late John Wheeler's phrase: "Spacetime tells matter how to move, matter tells spacetime how to curve." The result is rather similar to a PA system on the verge of producing a feedback whistle. Let's follow this analogy a bit further. Easier said than done. Here's the problem.
Quantum biology: Do weird physics effects abound in nature? 28 January 2013Last updated at 00:05 GMT By Jason Palmer and Alex Mansfield BBC News and BBC Radio Science Unit The multi-billion-dollar fragrance industry might just benefit from the ideas in quantum biology Disappearing in one place and reappearing in another. Being in two places at once. Communicating information seemingly faster than the speed of light. This kind of weird behaviour is commonplace in dark, still laboratories studying the branch of physics called quantum mechanics, but what might it have to do with fresh flowers, migrating birds, and the smell of rotten eggs? Welcome to the frontier of what is called quantum biology. It is still a tentative, even speculative discipline, but what scientists are learning from it might just spark revolutions in the development of new drugs, computers and perfumes - or even help in the fight against cancer. The idea that biology - impossibly warm, wet and messy to your average physicist - should play host to these states was almost heretical.
If this theory is correct, we may live in a web of alternate timelines Okay, here's another ponderation on the applicability of MWI to consider: Schroedinger's Cat. MWI has outlandish implications, but those implications all live far beyond the quantum horizon. None of them are scientifically important...at least not with the limits of our tech. If you buy MWI, right now, we can communicate with other universes to the tune of a couple of qbits. The distance between that at contacting highly divergent versions of ourselves is so vast it makes no odds whether its true or not. The other interpretations ALSO have outlandish implications and those outlandish implications actually do affect experiments we can do in the real world. Consider Schroedinger's Cat. Of course, this doesn't work with literal cats because cats can observe quantum events. But the implications of this model of reality...that it snaps into existence when observed...have befuddled scientists for a century. With MWI, you are doing the same math, you are predicting the same kinds of outcomes.
The Quantum Mechanics of Fate - Issue 9: Time “The objective world simply is, it does not happen,” wrote mathematician and physicist Hermann Weyl in 1949. From his point of view, the universe is laid out in time as surely as it is laid out in space. Time does not pass, and the past and future are as real as the present. If your common sense rebels against this idea, it is probably for a single reason: the arrow of causality. Events in the past cause events in the present which cause events in the future. If time really is like space, then shouldn’t events from the future influence the present and past, too? They actually might. That evidence, they say, is something called entanglement, a signature feature of quantum mechanics. Causality is a two-headed arrow and the future might influence the past. The standard interpretation of entanglement is that there is some kind of instant communication happening between the two particles. To think about this problem, consider the most prosaic of objects: a popsicle stick.
Physicists May Have Evidence Universe Is A Computer Simulation Physicists say they may have evidence that the universe is a computer simulation. How? They made a computer simulation of the universe. A long-proposed thought experiment, put forward by both philosophers and popular culture, points out that any civilisation of sufficient size and intelligence would eventually create a simulation universe if such a thing were possible. And since there would therefore be many more simulations (within simulations, within simulations) than real universes, it is therefore more likely than not that our world is artificial. Now a team of researchers at the University of Bonn in Germany led by Silas Beane say they have evidence this may be true. In a paper named ‘Constraints on the Universe as a Numerical Simulation’, they point out that current simulations of the universe - which do exist, but which are extremely weak and small - naturally put limits on physical laws. But the basic impression is an intriguing one.
Weird Quantum Tunneling Enables 'Impossible' Space Chemistry A weird quirk of quantum mechanics is allowing a chemical reaction thought to be impossible to occur in cold gas in outer space. In the harsh environment of space, where the temperature is about minus 350 degrees Fahrenheit (minus 210 degrees Celsius), scientists had thought a certain reaction involving alcohol molecules couldn't take place, because at such low temperatures, there shouldn't be enough energy to rearrange chemical bonds. But surprisingly, research has shown that the reaction occurs at a rate 50 times greater in space than at room temperature. Now, by simulating the conditions of space in a laboratory, scientists have found a possible explanation for how the reaction occurs: quantum tunneling. Tunneling depends on the odd rules of quantum mechanics, which state that particles don't usually have decided states, positions and speeds, but exist in hazes of probability. Hubble Quiz: Do You Know the Famous Space Telescope? 0 of 10 questions complete