Universal quench dynamics of lattice $q$ fermion Yukawa Sachdev-Ye-Kitaev model
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866911214839267328 |
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| author | Qiu, Haixin Kehrein, Stefan |
| author_facet | Qiu, Haixin Kehrein, Stefan |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_07971 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Universal quench dynamics of lattice $q$ fermion Yukawa Sachdev-Ye-Kitaev model Qiu, Haixin Kehrein, Stefan Strongly Correlated Electrons Quantum Physics 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. |
| title | Universal quench dynamics of lattice $q$ fermion Yukawa Sachdev-Ye-Kitaev model |
| topic | Strongly Correlated Electrons Quantum Physics |
| url | https://arxiv.org/abs/2505.07971 |