Inverted c-functions in thermal states. (English) Zbl 1521.81355
Summary: We first compute the effect of a chiral anomaly, charge, and a magnetic field on the entanglement entropy in \(\mathcal{N} = 4\) Super-Yang-Mills theory at strong coupling via holography. Depending on the width of the entanglement strip the entanglement entropy probes energy scales from the ultraviolet to the infrared energy regime of this quantum field theory (QFT) prepared in a given state. From the entanglement entropy, we compute holographic c-functions and demonstrate an inverted c-theorem for them. That is, these c-functions in generic thermal states monotonically increase towards the infrared (IR) energy regime. This is in contrast to the c-functions in vacuum states which decrease along the renormalization group flow towards the IR regime of a renormalizable QFT. Furthermore, in thermal states and in the IR limit, the c-functions behave thermally, growing proportionally to the value of the thermal entropy. The chiral anomaly affects the c-functions more in the IR regime, and its effect is peaked at an intermediate value of the magnetic field at a fixed chemical potential and temperature.
MSC:
| 81T50 | Anomalies in quantum field theory |
| 83C57 | Black holes |
| 81T40 | Two-dimensional field theories, conformal field theories, etc. in quantum mechanics |
| 81T17 | Renormalization group methods applied to problems in quantum field theory |
| 81T30 | String and superstring theories; other extended objects (e.g., branes) in quantum field theory |
| 81T35 | Correspondence, duality, holography (AdS/CFT, gauge/gravity, etc.) |
Software:
MathematicaReferences:
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