{"id":930126,"date":"2023-11-11T08:04:22","date_gmt":"2023-11-11T08:04:22","guid":{"rendered":"https:\/\/projects.ift.uam-csic.es\/holotube\/?p=930126"},"modified":"2023-11-14T14:59:11","modified_gmt":"2023-11-14T14:59:11","slug":"november-14-a-holographic-effective-field-theory-for-a-metal-with-a-fermi-surface-by-dominic-else","status":"publish","type":"post","link":"https:\/\/projects.ift.uam-csic.es\/holotube\/2023\/11\/11\/november-14-a-holographic-effective-field-theory-for-a-metal-with-a-fermi-surface-by-dominic-else\/","title":{"rendered":"November 14: “A holographic effective field theory for a metal with a Fermi surface” by Dominic Else"},"content":{"rendered":"\n
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Date : November 14, 2023, 16:00 CET<\/strong><\/p>\n\n\n\n

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Dominic Else<\/strong><\/strong> (Perimeter Institute)<\/p>\n<\/div><\/div>\n\n\n\n

Link:<\/strong> https:\/\/ua-edu.zoom.us\/j\/86037901654?pwd=bkVHY1pGYUdqcDF3SnhQb2lHSGVkQT09<\/a><\/p>\n\n\n\n

A holographic effective field theory for a metal with a Fermi surface<\/strong><\/p>\n<\/div><\/div>\n\n\n\n

Accessing the physics of strongly coupled metals in a controlled way is a challenging problem in theoretical condensed matter physics. In this talk, I will re-examine the possibility of understanding strongly coupled metals through a holographic dual. A core requirement in for any physically reasonable model of a metal is the existence of a Fermi surface in momentum space where the low-energy excitations live, satisfying “Luttinger’s theorem” which relates its volume to the microscopic charge density. In many holographic modes of metals, such a Fermi surface is not apparent in the classical limit of the holographic bulk theory; it may come back from quantum effects in the bulk, but exactly how this occurs has not been fully explored. By contrast, in this talk I will discuss a new approach in which the Fermi surface is explicitly built in. The idea is that for applications, it should be sufficient to construct a holographic dual of the effective field theory that controls the infra-red physics of the metal. I then invoke recent work that has identified a precise criterion for such an effective field theory to be “emergeable” from a continuum UV theory at nonzero charge density. I show that imposing this criterion leads to a holographic model of a strongly coupled metal with the Fermi surface built in, leading to a seemingly physically reasonable model of a strongly coupled metal.<\/p>\n\n\n\n