# A Brief Overview of Hard-Thermal-Loop Perturbation Theory

Su N (2012) *Communications in Theoretical Physics* 57(3): 409-421.

Download

**No fulltext has been uploaded. References only!**

*Journal Article*|

*Original Article*|

*Published*|

*English*

No fulltext has been uploaded

Author

Department

Abstract

The poor convergence of quantum field theory at finite temperature has been one of the main obstacles in the practical applications of thermal QCD for decades. Here we briefly review the progress of hard-thermal-loop perturbation theory (HTLpt) in reorganizing the perturbative expansion in order to improve the convergence. The quantum mechanical anharmonic oscillator is used as a simple example to show the breakdown of weak-coupling expansion, and variational perturbation theory is introduced as an effective resummation scheme for divergent weak-coupling expansions. We discuss HTLpt thermodynamic calculations for QED, pure-glue QCD, and QCD with N-f = 3 up to three-loop order. The results suggest that HTLpt provides a systematic framework that can be used to calculate both static and dynamic quantities for temperatures relevant at LHC.

Keywords

Publishing Year

ISSN

PUB-ID

### Cite this

Su N. A Brief Overview of Hard-Thermal-Loop Perturbation Theory.

*Communications in Theoretical Physics*. 2012;57(3):409-421.Su, N. (2012). A Brief Overview of Hard-Thermal-Loop Perturbation Theory.

*Communications in Theoretical Physics*,*57*(3), 409-421. doi:10.1088/0253-6102/57/3/12Su, N. (2012). A Brief Overview of Hard-Thermal-Loop Perturbation Theory.

*Communications in Theoretical Physics*57, 409-421.Su, N., 2012. A Brief Overview of Hard-Thermal-Loop Perturbation Theory.

*Communications in Theoretical Physics*, 57(3), p 409-421. N. Su, “A Brief Overview of Hard-Thermal-Loop Perturbation Theory”,

*Communications in Theoretical Physics*, vol. 57, 2012, pp. 409-421. Su, N.: A Brief Overview of Hard-Thermal-Loop Perturbation Theory. Communications in Theoretical Physics. 57, 409-421 (2012).

Su, Nan. “A Brief Overview of Hard-Thermal-Loop Perturbation Theory”.

*Communications in Theoretical Physics*57.3 (2012): 409-421.
This data publication is cited in the following publications:

This publication cites the following data publications:

### Export

0 Marked Publications### Web of Science

View record in Web of Science®### Sources

arXiv 1204.0260

Inspire 1097062