Fluids move in beautiful ways, these kinds of motions are happening around you all the time, in your coffee when you stir it and in air when you move through it and in your blood as it flows. Art is beautiful when it shows us what is happening all around us!
[she laughs softly again]
[she tickles the cats stomach]
[Loki meows and kinda purrs]
He’s being nice today. Usually he’d have scratched me by now.
[Loki may still try]
[Thor starts putting his paws on Rudy’s face]
The Question That Could Unite Quantum Theory With General Relativity: Is Spacetime Countable?
Current thinking about quantum gravity assumes that spacetime exists in countable lumps, like grains of sand. That can’t be right, can it?
One of the big problems with quantum gravity is that it generates infinities that have no physical meaning. These come about because quantum mechanics implies that accurate measurements of the universe on the tiniest scales require high-energy. But when the scale becomes very small, the energy density associated with a measurement is so great that it should lead to the formation of a black hole, which would paradoxically ruin the measurement that created it.
These kinds of infinities are something of an annoyance. Their paradoxical nature makes them hard to deal with mathematically and difficult to reconcile with our knowledge of the universe, which as far as we can tell, avoids this kind of paradoxical behaviour.
How we escaped the Big Bang: New theory on moving through time
Associate Professor Dr Joan Vaccaro, of Griffith’s Centre for Quantum Dynamics, has solved an anomaly of conventional physics and shown that a mysterious effect called ’T violation’ could be the origin of time evolution and conservation laws.
“I begin by breaking the rules of physics, which is rather bold I have to admit, but I wanted to understand time better and conventional physics can’t do that,” Dr Vaccaro says.
“I do get conventional physics in the end though. This means that the rules I break are not fundamental. It also means that I can see why the universe has those rules. And I can also see why the universe advances in time.”
I’ve had quite a few new followers since the last time I formally introduced myself, so I thought I’d take a few moments to do just that!
I’m Devon, the blogger and scientist behind Scientists are People Too. Currently, I’m a fourth year graduate student at UCLA working on a PhD in physical chemistry. For three years, I did ultrafast spectroscopy to look at the condensed phase dynamics of simple molecules (and bashing my head against what turned out to be a dead-end project -_-).
However, this past summer, my wonderful husband and I found out that I was going to have a baby! Since my ultrafast work involved some pretty nasty chemicals, my PI helped me switch over to a theory project. I’ve thus spent the past few months working on mixed quantum/classical molecular dynamics simulations and preparing for parenthood!
I’ve been less active on here recently due to the holidays plus the fact that I’m due to give birth any day now, but I’ve got lots of great science blogging planned for the near future!
“The dynamics of a black hole merger and the way gravitational waves travel is sensitive to even smallest deviations from general relativity, like for example violations of the equivalence principle or the possibility that the graviton is not exactly massless. Bimetric gravity, higher-order modifications of general relativity, additional long-range interactions, or the gravitational aether – all these models will have to pass additional tests now. Undoubtedly, some will be winners (most likely where the disagreements from relativity’s predictions are too small to rule out), and some will be losers. And maybe one of them will turn out to supersede Einstein’s masterwork.”