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Questions tagged [computer]

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3
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1answer
94 views

Train Physics Simulation

It's my first time asking here so bear with me. I'm a computer scientist, and I'm working on a train simulator project. I'm having quite a difficult time understanding all the physics and formulas ...
0
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3answers
42 views

Which system for a quantum computer?

We are aware that we use binary system for our present day digital computers as they comprise of two states (0&1). But what system would fit the states of a quantum computer?
0
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1answer
41 views

What's wrong with this method of solving NP problems using a quantum computer?

As far as we know, Quantum Computers can not solve arbitrary NP problems in polynomial time. I have what appears to be a solution, but it is obviously to simple to be correct, since otherwise the ...
0
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0answers
24 views

Is there an interference pattern formed on the computer screen? [duplicate]

How could explain the the fringes going on the screen? Is it all happening on the camera? Why is it bending as-well? ?
7
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0answers
297 views

Using a time-like boundary as a computer?

Question and Summary Using classical calculations and the Robin boundary condition I show that one calculate the anti-derivative of a function within time $2X$ (I can compute an integral below) $$\...
0
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1answer
13 views

What influences the variance of signal transmission speed?

I'm currently thinking about the various sources that influence time when it is synchronized with the NTP protocol. One of them is the physical layer (OSI-model). When sending a bit over a cable, ...
-5
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2answers
76 views

Can we simulate whole universe with infinite size of RAM and modern computer? [duplicate]

If modern computers are universal turing machines and C language is turing complete, theoretically we could calculate and simulate every problem in the universe then theoritically we can simulate ...
0
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2answers
54 views

Can quantitative model explain away our world? [duplicate]

So, for the sake of argument, let us assume that we have sufficient computational power and brightest scientists. Can we explain/predict every aspect and event of our universe with quantitative model? ...
-1
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1answer
144 views

Quantum computer vs. classical probabilistic computer

Is it possible to make a quantum computer from a perfect random number generator. I'm wondering if anybody that's studied it could make one from that type of random number generator.
0
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1answer
331 views

Supposed we proved that we lived in a simulation. What are some of the current clues we would use to help us acknowledge this? [duplicate]

Suppose that there was a headline in every newspaper that said that science has now proven that we do indeed live in a simulation, without any doubt. Or, some godlike aliens that created our ...
0
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1answer
64 views

In hard disk drive, what exactly happen when we delete informations from our computer? [closed]

I thought that this question should be asked at some computer/information websites, but since I was researching about physical concepts in hard disk drive, maybe asking here can be a good idea. :P ...
1
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1answer
61 views

Can a quantum computer implement a classical one?

The normal question about this topic would be: Can a classical computer implement a quantum computer? But now I wonder the exact opposite: can a quantum computer implement a classical one? Can we say ...
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3answers
306 views

Is Physics Computable? [closed]

Is it possible for a Turing machine to simulate physics accurately?   For the problem of reals, I was thinking of the following: For each real, $2^1, 2^2, ...., 2^n, ...$ memory cells store the ...
-1
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1answer
185 views

why are qubits such a game changer in quantum computing? [duplicate]

Qubits are in a superposition which means that they can currently be both digits of 1 and 0 at the same time BUT this is my question: If Qubits have to be filtered to be used then what makes them ...
0
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1answer
135 views

Modeling the universe as a countably infinite state machine

Could the universe be modeled or thought of in terms of an countably infinite state machine? Philosophically, I am asking from a deterministic perspective. Now, I know that as humans, and beings ...
3
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0answers
64 views

Did early hard drives lose data from it getting read too many times?

According to wikipedia, early HDD drives used to use an electromagnet to 'write' data on a small region by magnetizing it. I also read in that same article, however, that they also 'read' the data ...
3
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1answer
134 views

Does “computation” increase entropy?

My computer is blowing heat, and all it's supposed to be doing is sending pulses of voltage through tiny circuits to flip and check the condition of FETs. Ignoring the source of the electricity, I ...
2
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2answers
69 views

Thought experiment involving Computer in an engineered gravity well

Suppose we have a computer at some location in space within Earth's Orbit. One can look at the all the gravitational forces being exerted on this device (one from the earth, smaller forces from the ...
-2
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1answer
158 views

Quantum decoherence - continuous software, discrete hardware interpretation

Assuming the universe to be a computing machine of some form that executes a specific software program. So far we have reverse engineered the software and it is described by the equations of quantum ...
0
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1answer
92 views

Do computers contain more information than the information stored in them? [closed]

Computers carry information like graphical, mathematical, musical information, etc. Nevertheless, it seems to me that a computer contains much more information than the kinds of information I ...
3
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0answers
87 views

formula for equivalence of number of qubits vs classical computational capability

there are many pop sci articles and press releases wrt quantum computing these days and some may tend to stretch precision in description. one particular area that bothers me at the moment: some ...
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3answers
2k views

Can we simulate the whole universe in computer? [closed]

Here is an idea: As human kind we discovered many laws, formulas, events, etc. in our surrounding environment.here is a way to discover the unknowns : Now if we simulate a virtual world with our ...
0
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1answer
70 views

Where does electrical power in PC or other electronic devices goes?

I am wondering where does energy goes for example in PC? As I understand part of it definitely changes to the heat and dissipates, but what about rest of the energy? There is no moving parts except ...
90
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1answer
10k views

If we had a “perfectly efficient” computer and all the energy in the Milky-way available, what number could it count to?

The idea for this question comes from an example in cryptography, where supposedly 256-bit symmetric keys will be enough for all time to come (brute-forcing a 256-bit key is sort-of equivalent to ...
0
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1answer
103 views

Is it scientifically possible to stop a screens polarization by adding a layer? [closed]

Back story: At work we deal with confidential data, however our desk layout does not allow for screen privacy. We do not a privacy screens and are not allowed to take apart our screens. In searching ...
1
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1answer
223 views

Simulating the Electric Field inside a Hollow Sphere of Uniform Charge

I've recently been studying Gauss's Law and have come across some results that I want to verify. For one, I am trying to verify that the electric field inside a conductor (in this case it could be ...
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0answers
27 views

Data acquisition from Pins ( 5Volt) [closed]

I'm trying to creat a data acquisition system using: computer Geosig ve-53 KPci3101 from the seismic sensor's manual we can see that every pin's output is a 5 volt (or 10?), my question is, how can ...
1
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0answers
710 views

Dual output logic gates? [closed]

I know with basic logic gates you see in computing, there are two inputs and one output, essentially allowing for one of two outputs, on or off. Does anyone know if dual output logic gates exist or ...
0
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1answer
87 views

Classical Computation without NOT [closed]

Is it possible to do universal classical computation using bits and 2-bit gates when you cannot perform a NOT operation on a single bit (hence cant do CNOT and so on). If yes, what are the possible ...
4
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2answers
358 views

Computations using light

I recently found out about analog computers. They really intrigue me. I've seen a few videos on how mechanical computers work. I also know that there are electric analog computers too (I have no clue ...
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1answer
181 views

Why does a thermal memory need a thermal bath?

In the article "Thermal Memory: A Storage of Phononic Information Phys. Rev. Lett. 101, 267203 – Published 29 December 2008" it's said that a thermal memory need a thermal bath, similar to a power ...
2
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1answer
4k views

Would quantum computers be better at everything a GPU normally does? [closed]

I have a very basic understanding of what GPU's and quantum computers are good at. To me, it seems like they overlap, but maybe this isn't completely true. GPU's are good for graphics which requires a ...
1
vote
1answer
117 views

Is it true that a processor with a higher temperature uses inevitably more power in comparison with a processor with a lower temperature?

If a processor has a higher temperature, can you be sure it it consumes more power than a processor with a lower temperature? And is the reverse relationship true? A processorchip with a higher mean ...
32
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4answers
10k views

Why do computers generate heat?

Computers generate heat when they work. Is it a result of information processing or friction (resistance)? Are these just different ways to describe the same thing? Or does some definite part of the ...
1
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1answer
90 views

Physics in Video Games [closed]

I am a programmer and I want to pursue the Game Design field. From talking to my teachers about it, they said that physics plays a major role. My Question is: How does physics transfer to a virtual ...
2
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0answers
245 views

M-Theory and computer simulation

I have a question. Is it possible to perform computer simulations based on the M-Theory? I was looking for such simulators or source codes but I have not found anything. However, M-theory must have ...
3
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2answers
402 views

Lexical/ontological/semantic knowledge base for physics

(1) Are there lexical/semantic knowledge bases for physics that can be used for automated reasoning and AI (like Princeton's Wordnet and MIT's Conceptnet for common sense English usage)? (2) If not ...
3
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4answers
6k views

Is our universe an emulation?

I was watching one of Neil Degrasse Tyson talks and there was a scientist (can't recall his name sorry) who was talking about a recent discovery: "Doubly-even self-dual linear binary error-...
32
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8answers
14k views

Since cables carry electricity moving at the speed of light, why aren't computer networks much faster?

Why can't cables used for computer networking transfer data really fast, say at the speed of light? I ask this because electricity travels at the speed of light. Take Ethernet cables for example, I ...
4
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0answers
116 views

Nature as a calculator [closed]

I wondered whether physical experiments can find the outcome of otherwise intractable mathematical problems. For example, solitons or other non-perturbative effects in QFT cannot be seen at any ...
-1
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3answers
1k views

How to convert RGB values to physical radiometry and/or photometry quantities and back?

What are RGB values actually mean in physical sense? Are these values mean some amount of light or energy per surface unit or what? Are they logarithmic? Fro example, why do these values are ...
3
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1answer
283 views

Does the weight of a computer go up as information is added to it? [duplicate]

This probably sounds really naive. But, a strange discussion came up on Quora about computers possibly weighing more when information is added to them. I tried looking around but couldn't find a ...
61
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9answers
29k views

Why is it said that without quantum mechanics we would not have modern computers?

I've heard this in many quantum mechanics talks and lectures, nevertheless I don't seem to grasp the idea behind it. What I mean is, at which point is that our modern understanding of quantum ...
2
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1answer
196 views

Theoretical Upper Bound on Processor Speed?

Barring aside considerations such as heat dissipation, capacitance, etc... (aka any sort of technological issue) what is the fastest speed of a processor? I am told that at distances of 1 planck ...
12
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3answers
2k views

How are physics and computer science getting united? [closed]

How is theoretical computer science getting united with physics? Phenomena like Quantum Computing uses Quantum Mechanics to be able to compute things, how are computers helping not just to model our ...
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0answers
46 views

Which model of computation can be viewed as being extended by the currently most relevant models of quantum computation?

Which model of quantum computation resembles most closely the attempts of implementation currently being made? And which non-quantum model of computation is the conceptually closest one to the above ...
0
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4answers
733 views

Heisenberg's uncertainty principle for electrons and atoms

Here is a video of Michio Kaku discussing Moore's Law and the quantum mechanical limits thereof. Around the 1:30 mark he's talking about how the chips today have a layer of 20 atoms across (I'm ...
2
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1answer
14k views

How is data physically written, read and stored inside hard drives?

How is data physically written, read and stored inside hard drives? Is it stored as differing spin of atoms inside the drive? Is that method the same in flash drives and SSDs?
14
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2answers
398 views

Upper bounding the Kolmogorov Complexity of the Standard Model

The Kolmogorov complexity of a hypothesis/theory/model is the shortest computer program that simulates it, regardless of how inefficient executing that program may be in terms of memory and time. I'm ...
0
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1answer
958 views

Are We Living in a Simulated Universe? [closed]

If the universe is just a Matrix- like simulation, how could we ever know? Physicist Silas Beane of the University of Bonn, Germany, thinks he has the answer!. His paper “Constraints on the Universe ...