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Exact Numerical Solution of the Fully Connected Classical and Quantum Heisenberg Spin Glass
Nikita Kavokine1,2, Markus Müller3, Antoine Georges1,4,5,6
1Center for Computational Quantum Physics, <a href="https://ror.org/00sekdz59">Flatiron Institute</a>, 162 5th Avenue, New York, New York 10010, USA.
Abstract:
We present the mean field solution of the quantum and classical Heisenberg spin glasses, using the combination of a high precision numerical solution of the Parisi full replica symmetry breaking equations and a continuous time quantum Monte Carlo algorithm. We characterize the spin glass order and its low-energy excitations down to zero temperature. The Heisenberg spin glass has a rougher energy landscape than its Ising analog, and exhibits a very slow temperature evolution of its dynamical properties. We extend our analysis to the doped, metallic Heisenberg spin glass, which displays unexpectedly slow spin dynamics, reflecting the proximity to the melting quantum critical point and its associated Sachdev-Ye-Kitaev Planckian dynamics.
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