Fermionic probes of local quantum criticality in one dimension

Journal Article · Sat Oct 15 00:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.84.086003· OSTI ID:21607965

Rangamani, Mukund; Withers, Benjamin ^[1]

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1. Centre for Particle Theory and Department of Mathematical Sciences, Science Laboratories, South Road, Durham DH1 3LE (United Kingdom)

We study the spectral functions of fermionic operators in 1+1-dimensional SU(N) super Yang-Mills theory with 16 supercharges at finite density using the holographically dual D1 brane geometry. This system exhibits quasiparticle peaks indicating the existence of Fermi points about which excitations have a finite relaxation time, in contrast with the Tomonaga-Luttinger model. The finite width may be attributed to the nontrivial interactions of the probe operators with the background density matrix, modeled holographically as a charged black hole. We show that the fermionic correlators can in fact be deduced from known results for fermion probes of the charged AdS{sub 4} black hole background, owing to some remarkable coincidences in supergravity truncations.

• OSTI ID: 21607965
• Journal Information: Physical Review. D, Particles Fields, Vol. 84, Issue 8; Other Information: DOI: 10.1103/PhysRevD.84.086003; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BLACK HOLES
CRITICALITY
D-BRANES
DENSITY
DENSITY MATRIX
EXCITATION
FERMIONS
INTERACTIONS
RELAXATION TIME
SPECTRAL FUNCTIONS
SUPERGRAVITY
TWO-DIMENSIONAL CALCULATIONS
YANG-MILLS THEORY
BRANES
ENERGY-LEVEL TRANSITIONS
FIELD THEORIES
FUNCTIONS
MATRICES
PHYSICAL PROPERTIES
UNIFIED-FIELD THEORIES