Non-Hermitian Kondo effect in ultracold alkaline-earth atoms

M Nakagawa, N Kawakami, M Ueda - Physical review letters, 2018 - APS
We investigate the Kondo effect in an open quantum system, motivated by recent
experiments with ultracold alkaline-earth (-like) atoms. Because of inelastic collisions and …

Controlling the interaction of ultracold alkaline-earth atoms

R Zhang, Y Cheng, P Zhang, H Zhai - Nature Reviews Physics, 2020 - nature.com
Ultracold alkaline-earth atoms are used in precision measurements and quantum
simulation. Because of their unique atomic structure, they could enable the study of …

Efficient method for quantum impurity problems out of equilibrium

J Thoenniss, M Sonner, A Lerose, DA Abanin - Physical Review B, 2023 - APS
We introduce an efficient method to simulate the dynamics of an interacting quantum
impurity coupled to noninteracting fermionic reservoirs. Viewing the impurity as an open …

Geometry of variational methods: dynamics of closed quantum systems

L Hackl, T Guaita, T Shi, J Haegeman, E Demler… - SciPost Physics, 2020 - scipost.org
We present a systematic geometric framework to study closed quantum systems based on
suitably chosen variational families. For the purpose of (A) real time evolution,(B) excitation …

Nonequilibrium quantum impurity problems via matrix-product states in the temporal domain

J Thoenniss, A Lerose, DA Abanin - Physical Review B, 2023 - APS
Describing a quantum impurity coupled to one or more noninteracting fermionic reservoirs is
a paradigmatic problem in quantum many-body physics. While historically the focus has …

Complex fixed points of the non-Hermitian Kondo model in a Luttinger liquid

SE Han, DJ Schultz, YB Kim - Physical Review B, 2023 - APS
Non-Hermitian physics in open quantum many-body systems provides novel opportunities
for the discovery of exotic quantum phenomena unexpected in Hermitian systems. A …

Cavity-enhanced Kondo effect

J Mochida, Y Ashida - Physical Review B, 2024 - APS
In metals containing magnetic impurities, conduction electrons screen the magnetic
impurities and induce the Kondo effect, ie, the enhancement of the electrical resistance at …

Two‐Channel Kondo Physics: From Engineered Structures to Quantum Materials Realizations

S Kirchner - Advanced Quantum Technologies, 2020 - Wiley Online Library
The Kondo effect assumes a central role in condensed matter physics. It describes the
exchange scattering of electrons with a localized moment and occurs in a wide range of …

Interorbital interactions in an -symmetric Fermi-Fermi mixture

B Abeln, K Sponselee, M Diem, N Pintul, K Sengstock… - Physical Review A, 2021 - APS
We characterize interisotope interorbital interactions between atoms in the S 0 1 ground
state and the P 0 3 metastable state in interacting Fermi-Fermi mixtures of Yb 171 and Yb …

Solving quantum impurity problems in and out of equilibrium with the variational approach

Y Ashida, T Shi, MC Bañuls, JI Cirac, E Demler - Physical review letters, 2018 - APS
A versatile and efficient variational approach is developed to solve in-and out-of-equilibrium
problems of generic quantum spin-impurity systems. Employing the discrete symmetry …