DO NOT USE THIS TAG just because the question requires a computation!
7
votes
1answer
175 views
Computability of physics
As far as I understand a Universal Quantum Simulator can simulate any quantum system and thus anything that exists in the universe. Also, a quantum computer can implement such a quantum simulator. ...
3
votes
1answer
262 views
Calculating displacement amplitude of ultrasonic power transducer
I am not a physicist, but my current project drives me to some physics-related computations, hence seeking help.
I have some ultrasonic transducers, 5938D-25LBPZT, for which very limited information ...
1
vote
0answers
115 views
An explanation for the Landauer's principle
Has anyone understood the Landauer's principle? What is the current status?
In specific, is there a theoretical derivation of the Landauer's Principle?(not the heuristic one based on Salizard's ...
0
votes
1answer
114 views
Reference-request: Computational science and physics [closed]
I'm interested in the following question:
Is Nature computable at it's most fundamental level?
Can anyone suggest any works (books, papers / articles, reviews) related to the above question?
...
0
votes
1answer
192 views
How is acceleration computed in the leap-frog algorithm in computer simulations of particles?
I am reading the book Computer Simulation of Liquids by Allen and Tildesley (here is another link). On page 80, the authors describe the leap-frog algorithm, which is used extensively in molecular ...
16
votes
1answer
532 views
Can lightning be used to solve NP-complete problems?
I'm a MS/BS computer science guy who is wondering about why lightning can't (or can?) be used to solve NP complete problems efficiently, but I don't understand the physics behind lightning, so I'm ...
0
votes
0answers
142 views
Quantum Compting or DNA computing [closed]
My friend and me are working on DNA computing and on some improvements to it.
Of course, we are working on computing aspects of this branch. So, we have insufficient knowledge about physics and ...
1
vote
0answers
141 views
Modeling the trajectory of a particle in an Electric field [closed]
[This problem has been resolved, sorry for posting in the wrong forum!]
(I was trying to model the trajectory of a particle in an electric field.)
1
vote
1answer
239 views
Does the universe follow a general physical and computational principle of evolution?
Evolution is a principle in biology, whereby organisms evolve their ability to replicate and multiply in numbers over successive generations. From a computational point of view, the organisms employ a ...
3
votes
1answer
90 views
buiding circuits from color superconductors
caveat: the sort of exotic matter engineering in here is currently beyond the reach of our technology, but, that having been said:
Has their been any research on building models of these sorts of ...
16
votes
5answers
423 views
What do theoretical physicists need from computer scientists?
I recently co-authored a paper (not online yet unfortunately) with some chemists that essentially provided answers to the question, "What do chemists need from computer scientists?" This included the ...
2
votes
2answers
232 views
Why can't we set the lattice spacing 'a' in lattice QCD?
My question is to do with lattice QCD. In the lattice action there is a parameter, 'a', the lattice spacing in physical units.
However, if we want to generate a configuration with a certain lattice ...
0
votes
2answers
609 views
how does human brain compare to a modern CPU in energy per bit?
Can someone compare the energy efficiency of human brain as a computer ? What is the energy in joules / flop ? may be some reasonable assumptions on the computational load of common tasks such as ...
2
votes
1answer
190 views
Church–Turing Thesis
Can the Church–Turing Thesis be proved assuming classical mechanics, how is the proof or disproof?
Edited: I was looking for a proof of "everything computable by a device obeying CM is computable by ...
8
votes
1answer
1k views
What programming languages would be helpful for a physicist to know? [closed]
From the vantage point of a physicist and the kind of problems he would like a computer program to solve, what are the essential programming languages that a physicist should know.
I know C++ and I ...
11
votes
1answer
823 views
How many qubits are needed for useful computation?
Seeing the news about 14 entangled states today @ Innsbruck:
I haven't found a clear guide online to how many qubits we are aiming for a first practical quantum computer,
e.g.
Factorization,
Search ...
6
votes
1answer
259 views
How to simulate a crashing wave?
I'd like to create a very rough animation of a wave crashing on a beach. I'm guessing it would have to be a particle simulator, where you code in the forces between the particles and then integrate ...
3
votes
0answers
383 views
live Kp index data
I need to create an online service displaying latest Kp index.
Where I can take the data?
The data should be in machine-readable format, i.e. text files, XML, or CGI gateways, for instance. No ...
8
votes
3answers
750 views
How efficient is a desktop computer?
As I understand it (and admittedly it's a weak grasp), a computer processes information irreversibly (AND gates, for example), and therefore has some minimum entropy increase associated with its ...
0
votes
0answers
96 views
Who uses R with multicore, SNOW or CUDA package? [closed]
who of you in this forum uses R (http://www.r-project.org/) with the multicore, SNOW or CUDA packages, so for advanced calculations that need more power than a workstation CPU? On which hardware do ...
7
votes
6answers
1k views
Physics and Computer Science
Not sure if this is a 'real' question, but what is the relation between physics and computer science? A lot of physicists are also computer scientists and vice versa. My professor has a PhD in Physics ...
10
votes
7answers
1k views
Software for physics calculations
What is some good free software for doing physics calculations?
I'm mainly interested in symbolic computation (something like Mathematica, but free).
