Zero sound from holography
Karch, A., Son, D.T. and Starinets, A.O. (2008) Zero sound from holography. Pre-print, 1-10. (arXiv:0806.3796). (Submitted).
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Description/Abstract
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 |
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| Related URLs: | |
| Subjects: | Q Science > QC Physics |
| Divisions: | University Structure - Pre August 2011 > School of Physics and Astronomy > Southampton High Energy Physics |
| Item ID: | 64271 |
| Date Deposited: | 13 Jan 2009 |
| Last Modified: | 02 Mar 2012 11:51 |
| Contributors: | Karch, A. (Author) Son, D.T. (Author) Starinets, A.O. (Author) |
| Date: | 24 June 2008 |
| Status: | Submitted |
| Contact Email Address: | cs@phys.soton.ac.uk |
| URI: | http://eprints.soton.ac.uk/id/eprint/64271 |
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