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|Abstract:||We analyze fermionic response in the geometry holographically dual to zero-temperature N = 4 super-Yang-Mills theory with two equal nonvanishing chemical potentials, which is characterized by a singular horizon and zero ground state entropy. We show that fermionic fluctuations are completely stable within a gap in energy around a Fermi surface singularity, beyond which non-Fermi liquid behavior returns. This gap disappears abruptly once the final charge is turned on and is associated to a discontinuity in the corresponding chemical potential. We also show that the singular near-horizon geometry lifts to a smooth AdS(3) x R-3 and interpret the gap as a region where the quasiparticle momentum is spacelike in six dimensions due to the momentum component in the Kaluza-Klein direction, corresponding to the final charge.|
|Electronic Publication Date:||26-Feb-2015|
|Citation:||DeWolfe, Oliver, Gubser, Steven S, Rosen, Christopher. (2015). Fermionic response in a zero entropy state of N=4 super-Yang-Mills. PHYSICAL REVIEW D, 91 (10.1103/PhysRevD.91.046011|
|Type of Material:||Journal Article|
|Journal/Proceeding Title:||PHYSICAL REVIEW D|
|Version:||Final published version. This is an open access article.|
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