Sachdev-Ye-Kitaev models and beyond: Window into non-Fermi liquids
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 …
body systems without quasiparticle excitations, and its connections to various theoretical …
Collective-mode enhanced matter-wave optics
C Deppner, W Herr, M Cornelius, P Stromberger… - Physical Review Letters, 2021 - APS
In contrast to light, matter-wave optics of quantum gases deals with interactions even in free
space and for ensembles comprising millions of atoms. We exploit these interactions in a …
space and for ensembles comprising millions of atoms. We exploit these interactions in a …
Large- theory of critical Fermi surfaces. II. Conductivity
A Fermi surface coupled to a scalar field can be described in a 1/N expansion by choosing
the fermion-scalar Yukawa coupling to be random in the N-dimensional flavor space, but …
the fermion-scalar Yukawa coupling to be random in the N-dimensional flavor space, but …
Large- theory of critical Fermi surfaces
We describe the large-N saddle point, and the structure of fluctuations about the saddle
point, of a theory containing a sharp, critical Fermi surface in two spatial dimensions. The …
point, of a theory containing a sharp, critical Fermi surface in two spatial dimensions. The …
Solvable models of two-level systems coupled to itinerant electrons: Robust non-Fermi liquid and quantum critical pairing
Strange metal behavior is traditionally associated with an underlying putative quantum
critical point at zero temperature. However, in many correlated metals, eg, high-T c cuprate …
critical point at zero temperature. However, in many correlated metals, eg, high-T c cuprate …
Spectral properties of a one-dimensional extended Hubbard model from bosonization and time-dependent variational principle: Applications to one-dimensional …
Motivated by recent angle-resolved photoemission spectroscopy (ARPES) experiments on
doped one-dimensional (1D) cuprates, we investigate spectral properties of a 1D extended …
doped one-dimensional (1D) cuprates, we investigate spectral properties of a 1D extended …
A sport and a pastime: Model design and computation in quantum many-body systems
We summarize the recent developments in the model design and computation for a few
representative quantum many-body systems, encompassing quantum critical metals beyond …
representative quantum many-body systems, encompassing quantum critical metals beyond …
Interplay between superconductivity and non-Fermi liquid at a quantum critical point in a metal. I. The model and its phase diagram at : The case
Near a quantum critical point in a metal, a strong fermion-fermion interaction, mediated by a
soft boson, acts in two different directions: it destroys fermionic coherence and it gives rise to …
soft boson, acts in two different directions: it destroys fermionic coherence and it gives rise to …
Signatures of Cooper pair dynamics and quantum-critical superconductivity in tunable carrier bands
Different superconducting pairing mechanisms are markedly distinct in the underlying
Cooper pair kinematics. Quantum-critical soft modes drive pairing interactions in which the …
Cooper pair kinematics. Quantum-critical soft modes drive pairing interactions in which the …
Field-theoretic functional renormalization group formalism for non-Fermi liquids and its application to the antiferromagnetic quantum critical metal in two dimensions
To capture the universal low-energy physics of metals within effective field theories, one has
to generalize the usual notion of scale invariance and renormalizable field theory due to the …
to generalize the usual notion of scale invariance and renormalizable field theory due to the …