"Spectral Weight in Holographic Superfluids," by Victoria Lynn Martin (Stanford University)

Tuesday, October 4, 2016 - 4:00pm to 5:00pm
TEP Seminars

TEP Seminar

Physics & Astronomy Building (PAB) Room 4-330
​Tuesday, October 4, 2016

Guest Speaker: Victoria Lynn Martin (Stanford University)

Talk Title: "Spectral Weight in Holographic Superfluids"


The spectral weight is an important and interesting field theoretic quantity. It directly counts the number of degrees of freedom at a given momentum. Therefore, calculating a nonzero value for the spectral weight at low energy and over a finite range of momenta is a signature of a Fermi surface. In a previous work, we calculated the low energy spectral weight for a semi-local quantum liquid in a holographic setting, and discovered that it was nonzero over a finite range of momenta. We attributed this Fermi surface behavior to the charges existing behind the black hole horizon. In this work, we calculate the spectral weight for a holographic superfluid. One would expect to find zero spectral weight in this situation, since here the bulk charges are in front of the horizon and manifestly form a condensate. Surprisingly, we find a result to the contrary, which raises interesting questions about bulk degrees of freedom and/or the connection between the bulk and boundary charge distributions. We interpret these results and give directions for future work.

Event Attachments: 
PAB 4-330