University in the large Nc dynamics of flavour: thermal vs. quantum induced phase transitions

作者：Filev Veselin G^*; Johnson Clifford V

来源：The Journal of High Energy Physics, 2008, (10): 058.

• Gauge-gravity correspondence
• AdS-CFT Correspondence
• D-branes

We show how two important types of phase transition in large N-c gauge theory with fundamental flavours can be cast into the same classifying framework as the meson-melting phase transition. These are quantum fluctuation induced transitions in the presence of an external electric field, or a chemical potential for R-charge. The classifying framework involves the study of the local geometry of a special D-brane embedding, which seeds a self-similar spiral structure in the space of embeddings. The properties of this spiral, characterized by a pair of numbers, capture some key universal features of the transition. Computing these numbers for these non-thermal cases, we find that these transitions are in the same universality class as each other, but have different universal features from the thermal case. We present a natural generalization that yields new universality classes that may pertain to other types of transition.

• 出版日期2008-10