Universal quench dynamics of lattice $q$ fermion Yukawa Sachdev-Ye-Kitaev model

• URL: http://arxiv.org/abs/2505.07971v1
• Date: Mon, 12 May 2025 18:12:12 GMT
• Title: Universal quench dynamics of lattice $q$ fermion Yukawa Sachdev-Ye-Kitaev model
• Authors: Haixin Qiu, Stefan Kehrein,
• Abstract summary: We study the quantum quench of the Yukawa Sachdev-Ye-Kitaev model and one of its lattice extensions with $q$ fermions and one boson.<n>With weak lattice coupling quenches, we find universal thermalization dynamics similar to the SYK model.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We study the quantum quench of the Yukawa Sachdev-Ye-Kitaev model and one of its lattice extensions with $q$ fermions and one boson. Several equilibrium properties are computed for general $q$ with different parameter scaling within the large-$N$ dynamical mean field scheme. The non-Fermi liquid quench dynamics are studied by integrating the Kadanoff-Baym equations for switching off the lattice term with constant Yukawa coupling or quenching to different final Yukawa couplings. The post-quench oscillations and relaxation dynamics are insensitive to the quench amplitudes deep inside the non-Fermi liquid phase. With weak lattice coupling quenches, we find universal thermalization dynamics similar to the SYK model; however, with two temperatures and two distinct relaxation rates for bosons and fermions, both signal Planckian relaxations without quasiparticles, as in strange metals.

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