| 1. |
- Alho, T., et al.
(författare)
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Monopole correlation functions and holographic phases of matter in 2+1 dimensions
- 2016
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Ingår i: Physical Review D. - 2470-0010. ; 94:10
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Tidskriftsartikel (refereegranskat)abstract
- The strong coupling dynamics of a 2 + 1 dimensional U(1) gauge theory coupled to charged matter is holographically modeled via a top-down construction with intersecting D3-and D5-branes. We explore the resulting phase diagram at finite temperature and charge density using correlation functions of monopole operators, dual to magnetically charged particles in the higher-dimensional bulk theory, as a diagnostic.
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| 2. |
- Angel-Ramelli, J., et al.
(författare)
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Entanglement entropy in generalised quantum Lifshitz models
- 2019
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Ingår i: Journal of High Energy Physics (JHEP). - 1126-6708 .- 1029-8479. ; :8
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Tidskriftsartikel (refereegranskat)abstract
- We compute universal finite corrections to entanglement entropy for generalised quantum Lifshitz models in arbitrary odd spacetime dimensions. These are generalised free field theories with Lifshitz scaling symmetry, where the dynamical critical exponent z equals the number of spatial dimensions d, and which generalise the 2+1-dimensional quantum Lifshitz model to higher dimensions. We analyse two cases: one where the spatial manifold is a d-dimensional sphere and the entanglement entropy is evaluated for a hemisphere, and another where a d-dimensional flat torus is divided into two cylinders. In both examples the finite universal terms in the entanglement entropy are scale invariant and depend on the compactification radius of the scalar field.
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| 3. |
- Forini, V., et al.
(författare)
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One-loop spectroscopy of semiclassically quantized strings: bosonic sector
- 2015
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Ingår i: Journal of Physics A: Mathematical and Theoretical. - : IOP Publishing. - 1751-8121 .- 1751-8113. ; 48:8, s. Art. no. 085401-
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Tidskriftsartikel (refereegranskat)abstract
- We make a further step in the analytically exact quantization of spinning string states in semiclassical approximation, by evaluating the exact one-loop partition function for a class of two-spin string solutions for which quadratic fluctuations form a non-trivial system of coupled modes. This is the case of a folded string in the SU(2) sector, in the limit described by a quantum Landau-Lifshitz model. The same applies to the full bosonic sector of fluctuations over the folded spinning string in AdS(5) with an angular momentum J in S-5. Fluctuations are governed by a special class of fourth-order differential operators, with coefficients being meromorphic functions on the torus, which we are able to solve exactly.
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| 4. |
- Puletti, V. Giangreco M., et al.
(författare)
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Magnetic oscillations in a holographic liquid
- 2015
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Ingår i: Physical Review D. - 1550-7998 .- 1550-2368. ; 91:8
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Tidskriftsartikel (refereegranskat)abstract
- We present a holographic perspective on magnetic oscillations in strongly correlated electron systems via a fluid of charged spin 1/2 particles outside a black brane in an asymptotically anti-de-Sitter spacetime. The resulting backreaction on the spacetime geometry and bulk gauge field gives rise to magnetic oscillations in the dual field theory, which can be directly studied without introducing probe fermions, and which differ from those predicted by Fermi liquid theory.
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