TransWikia.com

What’s the basic procedure to draw a QCD phase diagram?

Physics Asked on March 20, 2021

Could someone recommend a book/resource where I can find a detailed way of sketching out a QCD temperature-chemical potential phase diagram using gap equations (eg. equations 35-37 or 39-40 as given here)?

P.S- Other similar questions on QCD phase diagrams focus more on their characteristics and not so much much on the basic method of obtaining them.

One Answer

It is rather a complicated question and still an area of active research. The most reliable and direct way to plot the phase diagram with the axes $mu, B, T$, where $mu$ is baryon potential, $B$ is magnetic field is by means of Lattice QCD.

However, there is a important limitation - that the theory with baryon chemical potential suffers from notorious sign problem. This makes the direct simulation not feasible and results are obtained with imaginary chemical potential $i mu$, and then analytically continued to the real axis. There also exist different approaches for handling the sign problem - reweighting, complex Langevin, but none of the gives fully satisfactory results.

As a not very recent but of a good quality review I recommend https://arxiv.org/abs/hep-lat/0701002v1.

Answered by spiridon_the_sun_rotator on March 20, 2021

Add your own answers!

Ask a Question

Get help from others!

© 2024 TransWikia.com. All rights reserved. Sites we Love: PCI Database, UKBizDB, Menu Kuliner, Sharing RPP