Inverted c-functions in thermal states
arXiv:2107.12409 · doi:10.1007/JHEP01(2022)161
Abstract
We first compute the effect of a chiral anomaly, charge, and a magnetic field on the entanglement entropy in 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.
arXiv comment55 pgs, 26 figures. Comments welcome! (V2: New figure, minor update to discussion throughout, typos corrected)
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