Sachdev-Ye-Kitaev models and beyond: Window into non-Fermi liquids

D Chowdhury, A Georges, O Parcollet… - Reviews of Modern Physics, 2022 - APS
This is a review of the Sachdev-Ye-Kitaev (SYK) model of compressible quantum many-
body systems without quasiparticle excitations, and its connections to various theoretical …

Quantum phases driven by strong correlations

S Paschen, Q Si - Nature Reviews Physics, 2021 - nature.com
It has long been thought that strongly correlated systems are adiabatically connected to their
non-interacting counterpart. Recent developments have highlighted the fallacy of this …

Emergent self-duality in a long-range critical spin chain: From deconfined criticality to first-order transition

S Yang, Z Pan, DC Lu, XJ Yu - Physical Review B, 2023 - APS
Over the past few decades, tremendous efforts have been devoted to understanding self-
duality at the quantum critical point, which enlarges the global symmetry and constrains the …

Linear resistivity and Sachdev-Ye-Kitaev (SYK) spin liquid behavior in a quantum critical metal with spin-1/2 fermions

P Cha, N Wentzell, O Parcollet… - Proceedings of the …, 2020 - National Acad Sciences
“Strange metals” with resistivity depending linearly on temperature T down to low T have
been a long-standing puzzle in condensed matter physics. Here, we consider a lattice model …

Dynamic electron correlations with charge order wavelength along all directions in the copper oxide plane

F Boschini, M Minola, R Sutarto, E Schierle… - Nature …, 2021 - nature.com
In strongly correlated systems the strength of Coulomb interactions between electrons,
relative to their kinetic energy, plays a central role in determining their emergent quantum …

Fixed point annihilation for a spin in a fluctuating field

A Nahum - Physical Review B, 2022 - APS
A quantum spin impurity coupled to a gapless free field (the Bose-Kondo model) can be
represented as a (0+ 1)-dimensional field theory with long-range-in-time interactions that …

Excitation spectra of quantum matter without quasiparticles. I. Sachdev-Ye-Kitaev models

M Tikhanovskaya, H Guo, S Sachdev, G Tarnopolsky - Physical Review B, 2021 - APS
We study the low-frequency spectra of complex Sachdev-Ye-Kitaev models at general
densities. The analysis applies also to SU (M) magnets with random exchange at large M …

Deconfined criticality and ghost Fermi surfaces at the onset of antiferromagnetism in a metal

YH Zhang, S Sachdev - Physical Review B, 2020 - APS
We propose a general theoretical framework, using two layers of ancilla qubits, for
deconfined criticality between a Fermi liquid with a large Fermi surface and a pseudogap …

Linear in temperature resistivity in the limit of zero temperature from the time reparameterization soft mode

H Guo, Y Gu, S Sachdev - Annals of Physics, 2020 - Elsevier
The most puzzling aspect of the 'strange metal'behavior of correlated electron compounds is
that the linear in temperature resistivity often extends down to low temperatures, lower than …

Planckian metal at a doping-induced quantum critical point

PT Dumitrescu, N Wentzell, A Georges, O Parcollet - Physical Review B, 2022 - APS
We numerically study a model of interacting spin-1/2 electrons with random exchange
coupling on a fully connected lattice. This model hosts a quantum critical point separating …