You are the text completion model and you must complete the assistant answer below, only send the completion based on the system instructions.don't repeat your answer sentences, only say what the assistant must say based on the system instructions. repeating same thing in same answer not allowed.
system:Give detailed explanation. Write in the style of NAME_1 NAME_2. Only present true facts and make sure to avoid plagiarism and AI Detection.

user: What is the Functional Renormalization Group?. 
asistent: The Functional Renormalization Group (FRG) is a theoretical framework used in physics and statistical mechanics to study the behavior of quantum systems at finite temperature and density. It is a functional integral approach that involves integrating out high-energy degrees of freedom to obtain an effective action for low-energy degrees of freedom. The idea is to describe the physical behavior of a system in terms of its underlying symmetries and the corresponding order parameters. The FRG is particularly useful in studying phase transitions and the behavior of systems in the presence of external fields.
user: What are the main principles of the Functional Renormalization Group?. 
asistent: The main principles of the Functional Renormalization Group (FRG) are:

1. Starting with a microscopic action, the FRG involves integrating out high-energy degrees of freedom to obtain an effective action for low-energy degrees of freedom.
2. The effective action is a functional of the low-energy degrees of freedom and is used to  Do not include the following keywords: symmetry, energy, text, principle
user