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I'm a post-doctoral researcher with a wide range of interests. My career is in complex systems science (or maybe cybernetics) and the origins of life, but I also have research interests in

  • the foundations of statistical mechanics and its relationship to information theory
  • Earth systems science
  • non-equilibrium thermodynamics in general

I'm also generally interested in the foundations of quantum mechanics and in black holes, though I wouldn't say I'm an expert on those things.

It's probably worth noting that despite the fact that my research is in physics-related areas, all my degrees are in other subjects. If I occasionally seem to start talking in an alien language, this is probably why.


Mar
7
comment Numerical Ising Model - Wolff algorithm and correlations
@DavidZ it's hard to imagine how a question about correlations in the Ising model could be said to be not about physics.
Mar
6
comment Is Sound Considered a Subtopic of Physics? What are the SI Units of Sound?
@CarlWittgoft you're right, I should have mentioned pascals. Decibels are what you'll find used in practice. I'll edit when I'm at a computer.
Mar
6
answered Is Sound Considered a Subtopic of Physics? What are the SI Units of Sound?
Mar
6
revised Mistake in Briefer History of Time by Stephen Hawking
edited tags
Mar
6
comment Huggins Displacement Theory and Retrocausality
Unfortunately this question will be closed. Questions that only ask for discussion are against the rules here. But it's an interesting topic, and if you can come up with some specific questions about it I hope they will be welcome.
Mar
6
comment Huggins Displacement Theory and Retrocausality
Huw Price writes about a different loop-hole in his 1996 book "Time's Arrow and Archimedes' Point". Price's loophole is that it's OK to change the past as long as there's no way that change in the past can be measured. He proposes this as an explanation for entanglement in quantum mechanics: in Price's interpretation, a causal influences doesn't travel faster than light between the two particles, but instead travels back in time to the point when the particles were in contact, and then forward again to the time when the other particle is measured. I've always thought that was pretty neat.
Mar
6
comment Huggins Displacement Theory and Retrocausality
This doesn't seem to work, for the following reason: the theory says I can send a message back in time one year to you, one light-year away. But you can then relay the message back to me one year ago (and one light-year away) as well. That means I receive the message two years before I sent it, leading to grandfather-type paradoxes.
Mar
6
comment Is it possible to avoid the radiation that caused the American flag turned into white on the Moon?
@DavidZ I would say the charitable interpretation of the question is: "what physical process causes the bleaching? Could NASA have predicted it in the 1960s? Are there any materials that wouldn't exhibit such an effect?" Perhaps it could do with some rewording to really bring those questions to the fore, but to me they seem clear enough, and they all seem like physics questions to me.
Mar
5
comment Can Information Travel Faster Than The Speed Of Light?
It could also be considered a duplicate of physics.stackexchange.com/q/2175. The question is framed slightly differently, but the answers to that question explain very well why the pendulum will not instantly drop to the ground.
Mar
5
comment Is it possible to avoid the radiation that caused the American flag turned into white on the Moon?
This question appears to be about physics within the scope defined in the help centre. Therefore I'm voting to reopen.
Mar
1
comment A problem with $E = mc^2$
I fixed your formatting, but I'm not really sure what you're asking.
Mar
1
revised A problem with $E = mc^2$
fixed markup
Mar
1
comment Couder-Fort Oil Bath Experiments and Quantum Entanglement Phenomena
Ok, I've updated my answer with an expanded version of that comment.
Mar
1
revised Couder-Fort Oil Bath Experiments and Quantum Entanglement Phenomena
added 1183 characters in body
Feb
28
answered How to determine “timelike”-ness without using a coordinate system?
Feb
28
comment Couder-Fort Oil Bath Experiments and Quantum Entanglement Phenomena
If the above answers your refined question, let me know and I'll update my answer.
Feb
28
comment Couder-Fort Oil Bath Experiments and Quantum Entanglement Phenomena
The mathematical analogy is between a two dimensional Hilbert space and a two dimensional vibrating oil surface. It might be possible to instead make an analogy between the 2d oil surface and two entangled particles each moving in one dimension. This would then violate Bell's inequalities in just the same way as quantum physics. However, since it would be a different analogy, I've no idea if it's possible.
Feb
28
answered The real meaning of time dilation
Feb
28
comment Conservation of phase space volume in Rindler space-time
Well, just that if I have a Hamiltonian specified in terms of Minkowski coordinates, I don't know how to transform the interaction terms into that kind of form, or whether it's always possible to do so. In fact, for an arbitrary Hamiltonian it obviously isn't possible, since a particle might be interacting with another particle outside the Rindler wedge. However, if we restrict ourselves to Hamiltonians without superluminal interactions (whatever that means formally) then it might always be possible. That's what I'd like to show.
Feb
27
comment Conservation of phase space volume in Rindler space-time
If I made the Hamiltonian up out of several separate Hamiltonians of that form, it would correspond to non-interacting particles. I'm interested in the general case, of several particles that can interact.