Difference between revisions of "Quantum Information Theory"
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==Reversibility== | ==Reversibility== | ||
* The current model of physical reality (some call the model a set of laws) shows no preference between moving forward versus backwards in time. Particles' "motions" can be predicted either way. | * The current model of physical reality (some call the model a set of laws) shows no preference between moving forward versus backwards in time. Particles' "motions" can be predicted either way. | ||
| − | * What is most interesting is that | + | * What is most interesting is that ''Landauer's principle'' is a physical principle pertaining to the lower theoretical limit of energy consumption of [[computation]]. It holds that "any logically irreversible manipulation of [[Information#As a property in physics|information]], such as the erasure of a [[bit]] or the merging of two [[computation]] paths, must be accompanied by a corresponding [[entropy]] increase in non-information-bearing degrees of freedom of the information-processing apparatus or its environment".<ref name = bennett>Charles H. Bennett, ''Notes on Landauer's principle, Reversible Computation and Maxwell's Demon.'' Studies in History and Philosophy of Modern Physics volume=34 issue=3 pp. 501–510 (2003) http://www.cs.princeton.edu/courses/archive/fall06/cos576/papers/bennett03.pdf DOI 10.1016/S1355-2198(03)00039-X</ref> |
==Three Areas of QIS== | ==Three Areas of QIS== | ||
Revision as of 15:35, 16 December 2022
Contents
Full Title or Meme
Quantum Information Theory (QIS) is a further abstraction of an abstract model of real-world physics.
Context
- QIS was first suggested by Richard Feynman as a means to model the real quantum work of subatomic interactions in Information Theory.
Reversibility
- The current model of physical reality (some call the model a set of laws) shows no preference between moving forward versus backwards in time. Particles' "motions" can be predicted either way.
- What is most interesting is that Landauer's principle is a physical principle pertaining to the lower theoretical limit of energy consumption of computation. It holds that "any logically irreversible manipulation of information, such as the erasure of a bit or the merging of two computation paths, must be accompanied by a corresponding entropy increase in non-information-bearing degrees of freedom of the information-processing apparatus or its environment".[1]
Three Areas of QIS
These areas were taken from Hoofnagle and Garfinkel's book[2]
Quantum Sensing
Quantum Communication
See the wiki page on the Quantum Computing Threat to existing cryptography.
Quantum Computing
- Most closely tracks the original suggest from Richard Feynman in modeling the physical reality of Quantum Mechanics.
- Note that some would place the Quantum Computing Threat in this category as well. Any taxonomy such as this runs into classification ambiguity.
References
- ↑ Charles H. Bennett, Notes on Landauer's principle, Reversible Computation and Maxwell's Demon. Studies in History and Philosophy of Modern Physics volume=34 issue=3 pp. 501–510 (2003) http://www.cs.princeton.edu/courses/archive/fall06/cos576/papers/bennett03.pdf DOI 10.1016/S1355-2198(03)00039-X
- ↑ Chris Jay Hoofnagle and Simson L. Garfinkel, Law and Policy for the Quantum Age Cambridge UP 2022 ISN 9781108793179
