Review of Yu–Shiba–Rusinov bound state in quantum impurity structures: basic principle and current progress
Sign Up to like & getrecommendations! Published in 2024 at "Superconductor Science and Technology"
DOI: 10.1088/1361-6668/ad883c
Abstract: Magnetic impurities connected to superconductors reservoir result in bound states within the superconducting gap, so called Yu–Shiba–Rusinov (YSR) state. In the past few years, this field has gained much attention since it is crucial for… read more here.
Keywords: quantum impurity; shiba rusinov; bound; state ... See more keywords
Scalable tensor network algorithm for quantum impurity problems
Sign Up to like & getrecommendations! Published in 2025 at "Physical Review B"
DOI: 10.1103/7s3h-9crw
Abstract: The Grassmann time-evolving matrix product operator method has shown great potential as a general-purpose quantum impurity solver, as its numerical errors can be well-controlled and it is flexible to be applied on both the imaginary-… read more here.
Keywords: time; quantum impurity; tensor network; impurity ... See more keywords
Nonequilibrium quantum impurity problems via matrix-product states in the temporal domain
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review B"
DOI: 10.1103/physrevb.107.195101
Abstract: Describing a quantum impurity coupled to one or more non-interacting fermionic reservoirs is a paradigmatic problem in quantum many-body physics. While historically the focus has been on the equilibrium properties of the impurity-reservoir system, recent… read more here.
Keywords: time; quantum impurity; impurity; matrix product ... See more keywords
Efficient method for quantum impurity problems out of equilibrium
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review B"
DOI: 10.1103/physrevb.107.l201115
Abstract: We introduce an efficient method to simulate dynamics of an interacting quantum impurity coupled to non-interacting fermionic reservoirs. Viewing the impurity as an open quantum system, we describe the reservoirs by their Feynman-Vernon influence functionals… read more here.
Keywords: quantum impurity; impurity problems; quantum; impurity ... See more keywords
Solving equilibrium quantum impurity problems on the L-shaped Kadanoff-Baym contour
Sign Up to like & getrecommendations! Published in 2024 at "Physical Review B"
DOI: 10.1103/physrevb.110.165114
Abstract: The path integral formalism is the building block of many powerful numerical methods for quantum impurity problems. However, existing fermionic path integral based numerical calculations have only been performed in either the imaginary-time or the… read more here.
Keywords: time; baym contour; quantum impurity; kadanoff baym ... See more keywords
Quantum entanglement in a pure state of strongly correlated quantum impurity systems
Sign Up to like & getrecommendations! Published in 2024 at "Physical Review B"
DOI: 10.1103/physrevb.111.035112
Abstract: We consider quantum entanglement in strongly correlated quantum impurity systems for states manifesting interesting properties such as multi-level Kondo effect and dual nature between itineracy and localization etc.. For this purpose, we set up a… read more here.
Keywords: strongly correlated; quantum impurity; pure; impurity ... See more keywords
Exactly Solvable Quantum Impurity Model with Inverse-Square Interactions.
Sign Up to like & getrecommendations! Published in 2019 at "Physical review letters"
DOI: 10.1103/physrevlett.123.066406
Abstract: We construct an exactly solvable quantum impurity model which consists of spin-1/2 conduction fermions and a spin-1/2 magnetic moment. The ground state is a Gutzwiller projected Fermi sea with nonorthonormal modes and its wave function… read more here.
Keywords: quantum impurity; solvable quantum; inverse square; exactly solvable ... See more keywords
Multiorbital Quantum Impurity Solver for General Interactions and Hybridizations.
Sign Up to like & getrecommendations! Published in 2020 at "Physical review letters"
DOI: 10.1103/physrevlett.124.206405
Abstract: We present a numerically exact inchworm Monte Carlo method for equilibrium multiorbital quantum impurity problems with general interactions and hybridizations. We show that the method, originally developed to overcome the dynamical sign problem in certain real-time… read more here.
Keywords: general interactions; multiorbital quantum; sign problem; quantum impurity ... See more keywords
Inchworm tensor train hybridization expansion quantum impurity solver
Sign Up to like & getrecommendations! Published in 2025 at "Physical Review B"
DOI: 10.1103/yt8p-vr1v
Abstract: The investigation of quantum impurity models plays a crucial role in condensed matter physics because of their wide-ranging applications, such as embedding theories and transport problems. Traditional methods often fall short of producing accurate results… read more here.
Keywords: quantum impurity; impurity; tensor train;