Zero sound from holography

Karch, A., Son, D.T. and Starinets, A.O. (2008) Zero sound from holography. Pre-print, 1-10. (doi:10.1103/PhysRevLett.102.051602). (Submitted).


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Quantum liquids are characterized by the distinctive properties such as the low temperature behavior of heat capacity and the spectrum of low-energy quasiparticle excitations. In particular, at low temperature, Fermi liquids exhibit the zero sound, predicted by L. D. Landau in 1957 and subsequently observed in liquid He-3. In this paper, we ask a question whether such a characteristic behavior is present in theories with holographically dual description. We consider a class of gauge theories with fundamental matter fields whose holographic dual in the appropriate limit is given in terms of the Dirac-Born-Infeld action in AdS_{p+1} space. An example of such a system is the N=4 SU(N_c) supersymmetric Yang-Mills theory with N_f massless N=2 hypermultiplets at strong coupling, finite baryon number density, and low temperature. We find that these systems exhibit a zero sound mode despite having a non-Fermi liquid type behavior of the specific heat. These properties suggest that holography identifies a new type of quantum liquids.

Item Type: Article
Additional Information: arXiv:0806.3796
Related URLs:
Subjects: Q Science > QC Physics
Divisions: University Structure - Pre August 2011 > School of Physics and Astronomy > Southampton High Energy Physics
ePrint ID: 64271
Date Deposited: 13 Jan 2009
Last Modified: 08 Oct 2015 11:24

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