A note on the extensivity of the holographic entanglement entropy

作者：Barbon Jose L F^*; Fuertes Carlos A

来源：The Journal of High Energy Physics, 2008, (5): 053.

• nonperturbative effects
• 1/N expansion
• AdS-CFT correspondence

We consider situations where the renormalized geometric entropy, as defined by the AdS/CFT anastz of Ryu and Takayanagi, shows extensive behavior in the volume of the entangled region. In general, any holographic geometry that is 'capped' in the infrared region is a candidate for extensivity provided the growth of minimal surfaces saturates at the capping region, and the induced metric at the 'cap' is non-degenerate. Extensivity is well-known to occur for highly thermalized states. In this note, we show that the holographic ansatz predicts the persistence of the extensivity down to vanishing temperature, for the particular case of conformal field theories in 2 + 1 dimensions with a magnetic field and/or electric charge condensates.

• 出版日期2008-5