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Nearly critical superfluids in Keldysh-Schwinger formalism (2024)
Journal Article
Donos, A., & Kailidis, P. (2024). Nearly critical superfluids in Keldysh-Schwinger formalism. Journal of High Energy Physics, 2024(1), Article 110. https://doi.org/10.1007/jhep01%282024%29110

We examine the effective theory of critical dynamics near superfluid phase transitions in the framework of the Keldysh-Schwinger formalism. We focus on the sector capturing the dynamics of the complex order parameter and the conserved current corresp... Read More about Nearly critical superfluids in Keldysh-Schwinger formalism.

Nearly critical holographic superfluids (2022)
Journal Article
Donos, A., & Kailidis, P. (2022). Nearly critical holographic superfluids. Journal of High Energy Physics, 2022(12), Article 28. https://doi.org/10.1007/jhep12%282022%29028

We study the nearly critical behaviour of holographic superfluids at finite temperature and chemical potential in their probe limit. This allows us to examine the coupled dynamics of the full complex order parameter with the charge density of the sys... Read More about Nearly critical holographic superfluids.

Dissipative effects in finite density holographic superfluids (2022)
Journal Article
Donos, A., & Kailidis, P. (2022). Dissipative effects in finite density holographic superfluids. Journal of High Energy Physics, 2022(11), Article 53. https://doi.org/10.1007/jhep11%282022%29053

We derive the leading dissipative corrections of holographic superfluids at finite temperature and chemical potential by employing our recently developed techniques to study dissipative effects in the hydrodynamic limit of holographic theories. As pa... Read More about Dissipative effects in finite density holographic superfluids.

Holographic dissipation from the symplectic current (2022)
Journal Article
Donos, A., Kailidis, P., & Pantelidou, C. (2022). Holographic dissipation from the symplectic current. Journal of High Energy Physics, 2022(10), Article 58. https://doi.org/10.1007/jhep10%282022%29058

We develop analytic techniques to construct the leading dissipative terms in a derivative expansion of holographic fluids. Our basic ingredient is the Crnkovic-Witten symplectic current of classical gravity which we use to extract the dissipative tra... Read More about Holographic dissipation from the symplectic current.

Higgs/amplitude mode dynamics from holography (2022)
Journal Article
Donos, A., & Pantelidou, C. (2022). Higgs/amplitude mode dynamics from holography. Journal of High Energy Physics, 2022(8), Article 246. https://doi.org/10.1007/jhep08%282022%29246

Second order phase transitions are universally driven by an order parameter which becomes trivial at the critical point. At the same time, collective excitations which involve the amplitude of the order parameter develop a gap which smoothly closes t... Read More about Higgs/amplitude mode dynamics from holography.

Dissipation in holographic superfluids (2021)
Journal Article
Donos, A., Kailidis, P., & Pantelidou, C. (2021). Dissipation in holographic superfluids. Journal of High Energy Physics, 2021(9), Article 134. https://doi.org/10.1007/jhep09%282021%29134

We study dissipation in holographic superfluids at finite temperature and zero chemical potential. The zero overlap with the heat current allows us to isolate the physics of the conserved current corresponding to the broken global U(1). By using anal... Read More about Dissipation in holographic superfluids.

Incoherent hydrodynamics of density waves in magnetic fields (2021)
Journal Article
Donos, A., Pantelidou, C., & Ziogas, V. (2021). Incoherent hydrodynamics of density waves in magnetic fields. Journal of High Energy Physics, 2021(5), Article 270. https://doi.org/10.1007/jhep05%282021%29270

We use holography to derive effective theories of fluctuations in spontaneously broken phases of systems with finite temperature, chemical potential, magnetic field and momentum relaxation in which the order parameters break translations. We analytic... Read More about Incoherent hydrodynamics of density waves in magnetic fields.

Holographic Abrikosov lattices (2020)
Journal Article
Donos, A., Gauntlett, J. P., & Pantelidou, C. (2020). Holographic Abrikosov lattices. Journal of High Energy Physics, 2020(7), Article 095. https://doi.org/10.1007/jhep07%282020%29095

We study black hole solutions of D = 4 Einstein-Maxwell theory coupled to a charged scalar field that are holographically dual to a d = 3 conformal field theory with a non-vanishing chemical potential and constant magnetic field. We numerically const... Read More about Holographic Abrikosov lattices.

Hydrodynamics of broken global symmetries in the bulk (2019)
Journal Article
Donos, A., Martin, D., Pantelidou, C., & Ziogas, V. (2019). Hydrodynamics of broken global symmetries in the bulk. Journal of High Energy Physics, 2019(10), Article 218. https://doi.org/10.1007/jhep10%282019%29218

We consider holographic theories at finite temperature in which a continuous global symmetry in the bulk is spontaneously broken. We study the linear response of operators in a regime which is dual to time dependent, long wavelength deformations of s... Read More about Hydrodynamics of broken global symmetries in the bulk.

Holographic transport and density waves (2019)
Journal Article
Donos, A., & Pantelidou, C. (2019). Holographic transport and density waves. Journal of High Energy Physics, 2019(5), Article 79. https://doi.org/10.1007/jhep05%282019%29079

We consider transport of heat and charge in holographic lattices which are phases of strongly coupled matter in which translations are broken explicitly. In these systems, we study a spontaneous density wave that breaks translations incommensurately... Read More about Holographic transport and density waves.

Incoherent transport for phases that spontaneously break translations (2018)
Journal Article
Donos, A., Gauntlett, J. P., Griffin, T., & Ziogas, V. (2018). Incoherent transport for phases that spontaneously break translations. Journal of High Energy Physics, 2018(4), Article 53. https://doi.org/10.1007/jhep04%282018%29053

We consider phases of matter at finite charge density which spontaneously break spatial translations. Without taking a hydrodynamic limit we identify a boost invariant incoherent current operator. We also derive expressions for the small frequency be... Read More about Incoherent transport for phases that spontaneously break translations.

Boomerang RG flows with intermediate conformal invariance (2018)
Journal Article
Donos, A., Gauntlett, J. P., Rosen, C., & Sosa-Rodriguez, O. (2018). Boomerang RG flows with intermediate conformal invariance. Journal of High Energy Physics, 2018(04), Article 017. https://doi.org/10.1007/jhep04%282018%29017

For a class of D = 5 holographic models we construct boomerang RG flow solutions that start in the UV at an AdS5 vacuum and end up at the same vacuum in the IR. The RG flows are driven by deformations by relevant operators that explicitly break trans... Read More about Boomerang RG flows with intermediate conformal invariance.

Diffusion for holographic lattices (2018)
Journal Article
Donos, A., Gauntlett, J. P., & Ziogas, V. (2018). Diffusion for holographic lattices. Journal of High Energy Physics, 2018(3), Article 056. https://doi.org/10.1007/jhep03%282018%29056

We consider black hole spacetimes that are holographically dual to strongly coupled field theories in which spatial translations are broken explicitly. We discuss how the quasinormal modes associated with diffusion of heat and charge can be systemati... Read More about Diffusion for holographic lattices.

Diffusion in inhomogeneous media (2017)
Journal Article
Donos, A., Gauntlett, J. P., & Ziogas, V. (2017). Diffusion in inhomogeneous media. Physical Review D, 96(12), Article 125003. https://doi.org/10.1103/physrevd.96.125003

We consider the transport of conserved charges in spatially inhomogeneous quantum systems with a discrete lattice symmetry. We analyze the retarded two-point functions involving the charges and the associated currents at long wavelengths, compared to... Read More about Diffusion in inhomogeneous media.

Boomerang RG flows in M-theory with intermediate scaling (2017)
Journal Article
Donos, A., Gauntlett, J. P., Rosen, C., & Sosa-Rodriguez, O. (2017). Boomerang RG flows in M-theory with intermediate scaling. Journal of High Energy Physics, 2017(7), Article 128. https://doi.org/10.1007/jhep07%282017%29128

We construct novel RG flows of D=11 supergravity that asymptotically approach AdS4 × S7 in the UV with deformations that break spatial translations in the dual field theory. In the IR the solutions return to exactly the same AdS4 × S7 vacuum, with a... Read More about Boomerang RG flows in M-theory with intermediate scaling.

Holographic DC conductivity and Onsager relations (2017)
Journal Article
Donos, A., Gauntlett, J. P., Griffin, T., Lohitsiri, N., & Melgar, L. (2017). Holographic DC conductivity and Onsager relations. Journal of High Energy Physics, 2017(7), Article 6. https://doi.org/10.1007/jhep07%282017%29006

Within holography the DC conductivity can be obtained by solving a system of Stokes equations for an auxiliary fluid living on the black hole horizon. We show that these equations can be derived from a novel variational principle involving a function... Read More about Holographic DC conductivity and Onsager relations.

DC conductivity and higher derivative gravity (2017)
Journal Article
Donos, A., Gauntlett, J. P., Griffin, T., & Melgar, L. (2017). DC conductivity and higher derivative gravity. Classical and Quantum Gravity, 34(13), Article 135015. https://doi.org/10.1088/1361-6382/aa744a

For Gauss–Bonnet gravity and in the context of holography we show how the thermal DC conductivity can be obtained by solving a generalised system of Stokes equations for an auxiliary fluid on a curved black hole horizon. For more general higher deriv... Read More about DC conductivity and higher derivative gravity.

Diffusion and chaos from near AdS2 horizons (2017)
Journal Article
Blake, M., & Donos, A. (2017). Diffusion and chaos from near AdS2 horizons. Journal of High Energy Physics, 2017(2), Article 13. https://doi.org/10.1007/jhep02%282017%29013

We calculate the thermal diffusivity D = κ/cρ and butterfly velocity vB in holographic models that flow to AdS2 × Rd fixed points in the infra-red. We show that both these quantities are governed by the same irrelevant deformation of AdS2 and hence e... Read More about Diffusion and chaos from near AdS2 horizons.

Thermal backflow in CFTs (2017)
Journal Article
Banks, E., Donos, A., Gauntlett, J. P., Griffin, T., & Melgar, L. (2017). Thermal backflow in CFTs. Physical Review D, 95(2), Article 025022. https://doi.org/10.1103/physrevd.95.025022

We study the thermal transport properties of general conformal field theories (CFTs) on curved spacetimes in the leading order viscous hydrodynamic limit. At the level of linear response, we show that the thermal transport is governed by a system of... Read More about Thermal backflow in CFTs.