Please teach me this:(adsbygoogle = window.adsbygoogle || []).push({});

I think that the classical physical laws are the relations between expectation values of macroscopic objects(the values are taken average on ''quantum values'').The quantum physical laws in one sense are the relations between operators.Then there are a great difference between classical and quantum laws.So I do not understand why they say that the classical things are the leading order of aproximation of quantum things(e.g they say in leading order of aproximation the electromagnetic potential is square(e)/square(momentum)(in momentum space) when they considering renormalization group(considering the flow of electric charge under changing renormalization condition)).

Thank you very much in advance.

**Physics Forums - The Fusion of Science and Community**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# What is the difference between classical and quantum law?

Loading...

Similar Threads for difference between classical | Date |
---|---|

I Difference between statistical and dynamical properties | Feb 25, 2017 |

I Difference between atomic behavior in QM and classical physics | Mar 3, 2016 |

The difference between classical and quantum correlations | Feb 8, 2016 |

Fundamental difference between quantum physics and classical physics | Dec 10, 2013 |

Difference between classical wave function and quantum wave function | May 27, 2012 |

**Physics Forums - The Fusion of Science and Community**