TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.12.1.031
TI  - Non-equilibrium Sachdev-Ye-Kitaev model with quadratic perturbation
PY  - 2022/01/20
UR  - https://scipost.org/SciPostPhys.12.1.031
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 12
IS  - 1
SP  - 031
A1  - Aleksey, Lunkin
AU  - Feigel'man, Mikhail V.
AB  - We consider a non-equilibrium generalization of the mixed SYK$_4$+SYK$_2$ model and calculate the energy dissipation rate $W(\omega)$ that results due to periodic modulation of random quadratic matrix elements with a frequency $\omega$. We find that $W(\omega)$ possesses a peak at $\omega$ close to the polaron energy splitting $\omega_R$ found recently (PRL 125, 196602), demonstrating the physical significance of this energy scale. Next, we study the effect of energy pumping with a finite amplitude at the resonance frequency $\omega_R$ and calculate, in presence of this pumping, non-equilibrium dissipation rate due to low-frequency parametric modulation. We found an unusual phenomenon similar to "dry friction" in presence of pumping.
ER  -

@Article{10.21468/SciPostPhys.12.1.031,
	title={{Non-equilibrium Sachdev-Ye-Kitaev model with quadratic perturbation}},
	author={Aleksey V. Lunkin and  Mikhail V. Feigel’man},
	journal={SciPost Phys.},
	volume={12},
	pages={031},
	year={2022},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.12.1.031},
	url={https://scipost.org/10.21468/SciPostPhys.12.1.031},
}