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8
votes
3answers
219 views

Is there a physical limit to memory reading and writing speed?

Is there a limit to the speed at which a memory, quantum or classical, can be read or written into? I've seen this interesting question : Is there a physical limit to data transfer rate?. Here I'm ...
0
votes
0answers
49 views

Are strings capable of information processing? If so would string computers be more powerful than quantum computers?

A deterministic computer is weaker than quantum computer at least quadratically for (almost) all kinds of tasks. This is proved and the difference arises from Grover's search algorithm, which allows ...
0
votes
1answer
63 views

Why is entropy growth incompatible with “deterministically computed universes”?

I read on Wikipedia that in his book Calculating Space, Konrad Zuse "proposed that the universe is being computed by some sort of cellular automaton or other discrete computing machinery... and ...
0
votes
1answer
114 views

Can a system be PERFECTLY simulated by a quantum (and classical) computer? [closed]

This is a thought experiment, and as such will assume some crazy things. Let's say I decide to perfectly simulate my university as it is right now. I use a magic machine to instantly scan the entire ...
4
votes
1answer
265 views

Infinite bits to describe a qubit

In the Quantum Computation book by Nielsen and Chuang, the authors write in the context of quantum teleportation "Even if she (Alice) did know the state |w> , describing it precisely takes an ...
-4
votes
1answer
164 views

Why in common brouhgt praxis of IT a Quantum Computer is not yet existent? [closed]

Why in common brouhgt praxis of IT a Quantum Computer is not yet existent? Quantum Computing is a very much discussed term in Theoretical Physics, Information Science and Mathematics, it's a main ...
14
votes
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 ...
10
votes
1answer
1k views

How does Landauer's Principle apply in quantum (and generally reversible) computing

I understand that a reversible computer does not dissipate heat through the Landauer's principle whilst running - the memory state at all times is a bijective function of the state at any other time. ...
3
votes
2answers
1k views

Quantum Teleportation Fidelity

I understand that quantum teleportation fidelity is the overlap of the initial quantum state with the teleported quantum state. If the teleportation is perfect, then the fidelity would equal 1 or 100% ...