Karl Jones: Created page with "In physics, a '''physical system''' is a portion of the physical universe chosen for analysis. Everything outside the system is known as the environment. The environment i..."

2016-09-04T03:39:12Z

Created page with "In physics, a '''physical system''' is a portion of the physical universe chosen for analysis. Everything outside the system is known as the environment. The environment i..."

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In [[physics]], a '''physical system''' is a portion of the physical universe chosen for analysis. Everything outside the system is known as the environment. The environment is ignored except for its effects on itself.

== Description ==

In a physical system, a lower [[probability]] states that the vector is equivalent to a higher [[complexity]].

The split between system and environment is the analyst's choice, generally made to simplify the analysis. For example, the water in a lake, the water in half of a lake, or an individual molecule of water in the lake can each be considered a physical system. An isolated system is one that has negligible interaction with its environment.

Often a system in this sense is chosen to correspond to the more usual meaning of system, such as a particular [[machine]].

In the study of quantum coherence the "system" may refer to the microscopic properties of an object (e.g. the mean of a pendulum bob), while the relevant "environment" may be the internal degrees of freedom, described classically by the pendulum's thermal vibrations.

== See also ==

* [[Conceptual systems]]
* [[Phase space]]
* [[Physical ontology]]
* [[Physical phenomenon]]
* [[Signal-flow graph]]
* [[Thermodynamic system]]

== External links ==

* [https://en.wikipedia.org/wiki/Physical_system Physical system] @ Wikipedia.org

[[Category:Physics]]

Physical system - Revision history

Karl Jones: Created page with "In physics, a '''physical system''' is a portion of the physical universe chosen for analysis. Everything outside the system is known as the environment. The environment i..."