TY - JOUR

T1 - Fermionic response in a zero entropy state of N=4 super-Yang-Mills

AU - DeWolfe, Oliver

AU - Gubser, Steven S.

AU - Rosen, Christopher

N1 - Publisher Copyright:
© 2015 American Physical Society.

PY - 2015/2/26

Y1 - 2015/2/26

N2 - 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 AdS3×R3 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.

AB - 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 AdS3×R3 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.

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U2 - 10.1103/PhysRevD.91.046011

DO - 10.1103/PhysRevD.91.046011

M3 - Article

AN - SCOPUS:84982836590

SN - 1550-7998

VL - 91

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 4

M1 - 046011

ER -