PIRSA:12070009

Entangling Superconductivity and antiferromagnetism: Quantum Monte Carlo without the sign Problem

Sachdev, S. (2012). Entangling Superconductivity and antiferromagnetism: Quantum Monte Carlo without the sign Problem. Perimeter Institute. https://pirsa.org/12070009

Sachdev, Subir. Entangling Superconductivity and antiferromagnetism: Quantum Monte Carlo without the sign Problem. Perimeter Institute, Jul. 11, 2012, https://pirsa.org/12070009 

          @misc{ pirsa_PIRSA:12070009,
            doi = {10.48660/12070009},
            url = {https://pirsa.org/12070009},
            author = {Sachdev, Subir},
            keywords = {Condensed Matter},
            language = {en},
            title = {Entangling Superconductivity and antiferromagnetism: Quantum Monte Carlo without the sign Problem},
            publisher = {Perimeter Institute},
            year = {2012},
            month = {jul},
            note = {PIRSA:12070009 see, \url{https://pirsa.org}}
          }

Subir Sachdev Harvard University

DOI 10.48660/12070009
Collection
Talk Type Scientific Series
Subject

Abstract

It has long been known that a metal near an instability to antiferromagnetism also has a weak-coupling Cooper instability to spin-singlet d-wave-like superconductivity. However, the theory of the antiferromagnetic quantum critical point flows to strong-coupling in two spatial dimensions, and so the fate of the superconductivity has also been unclear. I will describe a method to realize the generic antiferromagnetic quantum critical in a metal in a sign-problem-free Monte Carlo simulation. Results showing Fermi surface reconstruction and unconventional spin-singlet superconductivity across the critical point are obtained.