Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session W56: Quantum Spin Liquids, Theory II
3:00 PM–5:48 PM,
Thursday, March 9, 2023
Room: Room 304
Sponsoring
Unit:
GMAG
Chair: Martin Mourigal, Georgia Tech
Abstract: W56.00011 : Frequency-resolved functional renormalization group for quantum magnetic systems*
5:00 PM–5:12 PM
Presenter:
Janik Potten
(Julius-Maximilians-Universitaet Wuerzburg)
Authors:
Janik Potten
(Julius-Maximilians-Universitaet Wuerzburg)
Tobias Mueller
(Julius-Maximilians University of Wuerzburg)
Ronny Thomale
(Julius-Maximilians University of Wuerzburg)
For the pseudo-fermion FRG (pf-FRG), we remedy this shortcoming by establishing a methodical approach based on the Keldysh formalism, originally developed to handle non-equilibrium physics. This novel approach, combining pf-FRG and Keldysh formalism, allows for calculating the dynamic properties of spin systems on arbitrary lattices. We can identify the correct low-energy behavior of the dynamic spin structure factors for examplary nearest neighbor Heisenberg systems. These first results are promising and extensions of this work might allow for an easy calculation of dynamic properties even for non-equilibrium magnetic systems in the future.
*The work is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through Project-ID 258499086 - SFB 1170 and the FOR 5249 (QUAST) as well as through the Würzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter – ct.qmat Project-ID 390858490 - EXC 2147.
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