Sebastian D. Huber
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View article: Partial suppression of magnetism in the square lattice SU(3) Hubbard model
Partial suppression of magnetism in the square lattice SU(3) Hubbard model Open
The SU(N) Hubbard model is a natural extension of the SU(2) model. However, even the N=3 case remains poorly understood. We report a substantially new ground-state phase diagram of the square lattice SU(3) Fermi-Hubbard model. Using a back…
View article: Design and characterization of all 2D fragile topological bands
Design and characterization of all 2D fragile topological bands Open
Designing topological materials with specific topological indices is a complex inverse problem, traditionally tackled through manual, intuition-driven methods that are neither scalable nor efficient for exploring the vast space of possible…
View article: Superfluid stiffness of superconductors with delicate topology
Superfluid stiffness of superconductors with delicate topology Open
We consider superconductivity in two-dimensional delicate topological bands, where the total Chern number vanishes but the Brillouin zone can be divided into subregions with a quantized nontrivial Chern number. We formulate a lower bound o…
View article: Overcomplete intermediate representation of two-particle Green's functions and its relation to partial spectral functions
Overcomplete intermediate representation of two-particle Green's functions and its relation to partial spectral functions Open
Two-particle response functions are a centerpiece of both experimental and theoretical quantum many-body physics. Yet, due to their size and discontinuity structure, they are challenging to handle numerically. Recently, two advances were m…
View article: Compression theory for inhomogeneous systems
Compression theory for inhomogeneous systems Open
View article: Design and characterization of all two-dimensional fragile topological bands
Design and characterization of all two-dimensional fragile topological bands Open
Designing topological materials with specific topological indices is a complex inverse problem, traditionally tackled through manual, intuition-driven methods that are neither scalable nor efficient for exploring the vast space of possible…
View article: Theory of Coulomb driven nematicity in a multi-valley two-dimensional electron gas
Theory of Coulomb driven nematicity in a multi-valley two-dimensional electron gas Open
The properties of a two-dimensional electron gas (2DEG) in a semiconductor host with two valleys related by an underlying $C_4$ rotational symmetry are studied using Hartree-Fock (HF) and various other many-body approaches. A familiar arti…
View article: Overcomplete intermediate representation of two-particle Green's functions and its relation to partial spectral functions
Overcomplete intermediate representation of two-particle Green's functions and its relation to partial spectral functions Open
Two-particle response functions are a centerpiece of both experimental and theoretical quantum many-body physics. Yet, due to their size and discontinuity structure, they are challenging to handle numerically. Recently, two advances were m…
View article: In‐Sensor Passive Speech Classification with Phononic Metamaterials
In‐Sensor Passive Speech Classification with Phononic Metamaterials Open
Mitigating the energy requirements of artificial intelligence requires novel physical substrates for computation. Phononic metamaterials have vanishingly low power dissipation and hence are a prime candidate for green, always‐on computers.…
View article: Nematic metal in a multi-valley electron gas: Variational Monte Carlo analysis and application to AlAs
Nematic metal in a multi-valley electron gas: Variational Monte Carlo analysis and application to AlAs Open
The two-dimensional electron gas is of fundamental importance in quantum many-body physics. We study a minimal extension of this model with $C_4$ (as opposed to full rotational) symmetry and an electronic dispersion with two valleys with a…
View article: Phases, instabilities and excitations in a two-component lattice model with photon-mediated interactions
Phases, instabilities and excitations in a two-component lattice model with photon-mediated interactions Open
Engineering long-range interacting spin systems with ultracold atoms offers the possibility to explore exotic magnetically ordered phases in strongly-correlated scenarios. Quantum gases in optical cavities provide a versatile experimental …
View article: Compression theory for inhomogeneous systems
Compression theory for inhomogeneous systems Open
The physics of complex systems stands to greatly benefit from the qualitative changes in data availability and advances in data-driven computational methods. Many of these systems can be represented by interacting degrees of freedom on inh…
View article: Untrained Physically Informed Neural Network for Image Reconstruction of Magnetic Field Sources
Untrained Physically Informed Neural Network for Image Reconstruction of Magnetic Field Sources Open
The prediction of measurement outcomes from an underlying structure often follows directly from fundamental physical principles. However, a fundamental challenge is posed when trying to solve the inverse problem of inferring the underlying…
View article: Phases, instabilities and excitations in a two-component lattice model with photon-mediated interactions
Phases, instabilities and excitations in a two-component lattice model with photon-mediated interactions Open
Engineering long-range interacting spin systems with ultra cold atoms offers the possibility to explore exotic magnetically ordered phases in strongly-correlated scenarios. Quantum gases in optical cavities provide a versatile experimental…
View article: Merging numerical renormalization group and intermediate representation to compactify two- and three-point correlators
Merging numerical renormalization group and intermediate representation to compactify two- and three-point correlators Open
The vanguard of many-body theory is nowadays dealing with the full frequency dynamics of n-point Green's functions for n higher than two. Numerically, these objects easily become a memory bottleneck, even when working with discrete imagina…
View article: Scalable Hamiltonian learning for large-scale out-of-equilibrium quantum dynamics
Scalable Hamiltonian learning for large-scale out-of-equilibrium quantum dynamics Open
Large-scale quantum devices provide insights beyond the reach of classical simulations. However, for a reliable and verifiable quantum simulation, the building blocks of the quantum device require exquisite benchmarking. This benchmarking …
View article: Correlation-enhanced neural networks as interpretable variational quantum states
Correlation-enhanced neural networks as interpretable variational quantum states Open
Variational methods have proven to be excellent tools to approximate the ground states of complex many-body Hamiltonians. Generic tools such as neural networks are extremely powerful, but their parameters are not necessarily physically mot…
View article: Binary classification of spoken words with passive phononic metamaterials
Binary classification of spoken words with passive phononic metamaterials Open
Mitigating the energy requirements of artificial intelligence requires novel physical substrates for computation. Phononic metamaterials have a vanishingly low power dissipation and hence are a prime candidate for green, always-on computer…
View article: Phase diagrams with real-space mutual information neural estimation
Phase diagrams with real-space mutual information neural estimation Open
Real-space mutual information (RSMI) has been shown to be an important quantity, both formally and from numerical standpoint, in constructing coarse-grained descriptions of physical systems. It very generally quantifies spatial correlation…
View article: Fragile Topology and Flat-Band Superconductivity in the Strong-Coupling Regime
Fragile Topology and Flat-Band Superconductivity in the Strong-Coupling Regime Open
In flat bands, superconductivity can lead to surprising transport effects. The superfluid "mobility", in the form of the superfluid weight D_{s}, does not draw from the curvature of the band but has a purely band-geometric origin. In a mea…
View article: Fragile topology and flat-band superconductivity in the strong-coupling regime
Fragile topology and flat-band superconductivity in the strong-coupling regime Open
In flat bands, superconductivity can lead to surprising transport effects. The superfluid "mobility", in the form of the superfluid weight $D_s$, does not draw from the curvature of the band but has a purely band-geometric origin. In a mea…
View article: Acoustic spin-Chern insulator induced by synthetic spin–orbit coupling with spin conservation breaking
Acoustic spin-Chern insulator induced by synthetic spin–orbit coupling with spin conservation breaking Open
Topologically protected surface modes of classical waves hold the promise to enable a variety of applications ranging from robust transport of energy to reliable information processing networks. However, both the route of implementing an a…
View article: Fully Automated Identification of Two-Dimensional Material Samples
Fully Automated Identification of Two-Dimensional Material Samples Open
Thin nanomaterials are key constituents of modern quantum technologies and materials research. The identification of specimens of these materials with the properties required for the development of state-of-the-art quantum devices is usual…
View article: Weyl orbits without an external magnetic field
Weyl orbits without an external magnetic field Open
Weyl semimetals in a magnetic field give rise to interesting non-local electronic orbits: the ballistic transport through the bulk enabled by the chiral Landau levels is combined with a momentum-space sliding along the surface Fermi-arc dr…
View article: Tunable Flux Vortices in Two-Dimensional Dirac Superconductors
Tunable Flux Vortices in Two-Dimensional Dirac Superconductors Open
The nontrivial geometry encoded in the quantum mechanical wave function has important consequences for both noninteracting and interacting systems. Yet, our understanding of the relationship between geometrical effects in noninteracting sy…
View article: Unsupervised identification of topological phase transitions using predictive models
Unsupervised identification of topological phase transitions using predictive models Open
Machine-learning driven models have proven to be powerful tools for the identification of phases of matter. In particular, unsupervised methods hold the promise to help discover new phases of matter without the need for any prior theoretic…
View article: Optimal Renormalization Group Transformation from Information Theory
Optimal Renormalization Group Transformation from Information Theory Open
Recently, a novel real-space renormalization group (RG) algorithm was introduced. By maximizing an information-theoretic quantity, the real-space mutual information, the algorithm identifies the relevant low-energy degrees of freedom. Moti…
View article: Erratum: Engineering Matter Interactions Using Squeezed Vacuum [Phys. Rev. X <b>7</b>, 021041 (2017)]
Erratum: Engineering Matter Interactions Using Squeezed Vacuum [Phys. Rev. X <b>7</b>, 021041 (2017)] Open
Received 31 January 2019DOI:https://doi.org/10.1103/PhysRevX.9.049903Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain …
View article: Hamiltonian learning for quantum error correction
Hamiltonian learning for quantum error correction Open
The efficient validation of quantum devices is critical for emerging technological applications. In a wide class of use cases the precise engineering of a Hamiltonian is required both for the implementation of gate-based quantum informatio…
View article: Experimental characterization of spectral flow between fragile bands
Experimental characterization of spectral flow between fragile bands Open
Symmetries crucially underlie the classification of topological phases of matter. Most materials, both natural as well as architectured, posses crystalline symmetries. Recent theoretical works unveiled that these crystalline symmetries can…