Article
Physics, Multidisciplinary
Milosz Panfil, Sarang Gopalakrishnan, Robert M. Konik
Summary: Many experimentally relevant systems are quasi-one-dimensional, consisting of nearly decoupled chains, where weak interchain couplings play a crucial role in thermalizing the system. We developed a Boltzmann-equation formalism involving a collision integral that is asymptotically exact for any interacting integrable system, and applied it to study relaxation in coupled Bose gases in the Newton's cradle setup. We found that relaxation involves a broad spectrum of timescales and the Markov process governing relaxation at late times is gapless, leading to nonexponential approach to equilibrium even for spatially uniform perturbations.
PHYSICAL REVIEW LETTERS
(2023)
Article
Optics
Manuel Valiente
Summary: The study developed a general theory of local unitary transformations between one-dimensional quantum systems of bosons and fermions with various low-energy interactions. These transformations generate families of duality relations and models linking the strong- and weak-coupling limits of the respective dual theories.
Article
Thermodynamics
Vincent Picandet, Noel Challamel
Summary: This paper studies heat conduction in micro-structured rods using one-dimensional thermal lattices to explore scale effects in conduction and diffusion problems. The nonlocal heat equation is shown to efficiently capture scale effect phenomena in periodic thermal lattices.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Materials Science, Multidisciplinary
Katharina Laubscher, Clara S. Weber, Dante M. Kennes, Mikhail Pletyukhov, Herbert Schoeller, Daniel Loss, Jelena Klinovaja
Summary: The study focuses on fractional boundary charges (FBCs) in strongly interacting systems, specifically in nanowires with periodic potentials and in the fractional quantum Hall effect at odd filling factors. The FBC shows quantized behavior that reflects the degeneracy of the ground state, providing simple ways to probe strongly interacting phases through boundary charge measurements.
Article
Materials Science, Multidisciplinary
Frederick del Pozo, Loic Herviou, Karyn Le Hur
Summary: We investigate the topological phases of two interacting superconducting wires in one dimension (1D) and propose directly measurable topological markers from ground-state correlation functions. These quantities remain powerful tools in the presence of couplings and interactions. We show that the double critical Ising (DCI) phase of two interacting Kitaev chains is a fractional topological phase with gapless Majorana modes in the bulk and a one-half topological invariant per wire. Using both numerics and quantum field theoretical methods, we demonstrate that the phase diagram remains stable in the presence of an interwire hopping amplitude t perpendicular to at length scales below similar to 1/t perpendicular to. A large interwire hopping amplitude leads to the emergence of two integer topological phases, which are also stable at large interactions. These phases host one edge mode per boundary shared between both wires. At large interactions, the two wires are described by Mott physics, with the t perpendicular to hopping amplitude resulting in a paramagnetic order.
Article
Physics, Multidisciplinary
Jingsan Hu, Jianfei Gu, Weiyi Zhang
Summary: In this study, Bloch's theorem was applied to investigate the interaction between a pair of electrons in periodic one-dimensional and two-dimensional lattices with intra-site and nearest neighbor inter-site interactions. The electronic structures were classified into binding bands and unbinding continuum states, with the presence of binding bands in both interaction types. These binding bands were found to be separated from the unbinding continuum states by gaps, depending on the nature of the interaction potential.
Article
Multidisciplinary Sciences
Wenjie Xi, Zhi-Hao Zhang, Zheng-Cheng Gu, Wei-Qiang Chen
Summary: This paper investigates the classification of topological phases in 1D interacting non-Hermitian systems, showing that it is exactly the same as their Hermitian counterparts. The study demonstrates the equivalence in topological phases between quasi-Hermitian and Hermitian systems in the context of interacting non-Hermitian local systems.
Article
Materials Science, Multidisciplinary
B. D. E. McNiven, Hanna Terletska, G. T. Andrews, J. P. F. LeBlanc
Summary: In this study, we investigate the properties of the t-t'-U Hubbard model on a two-dimensional square lattice in the weak-coupling limit using a direct perturbative approach. We find that for nonzero t', the resonance excitations exhibit different behaviors at different densities, which are related to the van Hove singularity of the noninteracting dispersion. We also observe a significant reduction in compressibility and a behavioral change in double occupancy near the van Hove singularity.
Article
Materials Science, Multidisciplinary
Patrycja Lydzba, Janez Bonca
Summary: The study investigates the unitary time evolution of a symmetry-broken state in a finite system of interacting hard-core bosons, which can be mapped onto the XXZ Heisenberg chain. A spatially homogeneous and time-dependent vector potential is introduced to mimic a short laser pulse, allowing control over the onset of charge density wave order. Nonthermal long-lived states with nonzero charge density wave order, translated by one lattice site, are found to have lifetimes significantly longer than typical times given by the system parameters, although they are suppressed by integrability-breaking perturbations. The existence of these long-lived nonthermal states in the thermodynamic limit is speculated based on the findings.
Article
Materials Science, Multidisciplinary
L. Crippa, A. Amaricci, S. Adler, G. Sangiovanni, M. Capone
Summary: The impact of Coulomb interaction on the electronic properties of a quantum spin Hall insulator has been studied using quantum cluster methods, with a focus on disentangling local from nonlocal effects. Different regimes have been identified based on the value of the bare mass term, with significant differences in self-energy contributions. The study shows that for small mass, nonlocal correlations become important and eventually dominate over local ones near the zero-mass semimetallic line, while for intermediate and large mass, local correlation effects outweigh nonlocal corrections, leading to a first-order topological phase transition.
Article
Physics, Condensed Matter
Aarushi Khandelwal, Shazed Mohammad Tashrif, Andrivo Rusydi
Summary: This article observes a new phenomenon of correlated plasmons and reveals the importance of the interplay between short-range and long-range interactions in determining the properties of correlated plasmons through studying various physical parameters.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Materials Science, Multidisciplinary
Weitao Chen, Liangtao Peng, Hantao Lu, Xiancong Lu
Summary: This paper investigates the relationship between edge entanglement entropy and topological properties in non-Hermitian systems, and extends it to non-Hermitian interacting systems. It is found that the presence of interactions weakens the breakdown of the bulk-boundary correspondence.
Article
Quantum Science & Technology
Tian-Xing Zheng, Anran Li, Jude Rosen, Sisi Zhou, Martin Koppenhoefer, Ziqi Ma, Frederic T. T. Chong, Aashish A. Clerk, Liang Jiang, Peter C. Maurer
Summary: In this study, a variational method is developed to generate metrological states in small dipolar-interacting spin ensembles with limited qubit control. The generated states enable sensing beyond the standard quantum limit (SQL) and are applicable to finite spin polarization and non-Markovian noise environments.
NPJ QUANTUM INFORMATION
(2022)
Article
Physics, Multidisciplinary
Przemyslaw Koscik, Tomasz Sowinski
Summary: We investigate the ground state of polarized fermions interacting through zero-range p-wave forces in one dimension. We prove that in the limit of infinite attraction, the spectral properties of any-order reduced density matrix describing arbitrary subsystems are independent of the shape of an external potential. Furthermore, we show that the purity of these matrices, which quantifies the amount of quantum correlations, can be analytically obtained for any number of particles without diagonalization. This observation serves as a rigorous benchmark for models and methods studying strongly interacting p-wave fermions.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Physical
Xabier Telleria-Allika, Miguel Escobar Azor, Gregoire Francois, Gian Luigi Bendazzoli, Jon M. Matxain, Xabier Lopez, Stefano Evangelisti, J. Arjan Berger
Summary: “”In this work, the Wigner localization of interacting electrons in a one-dimensional harmonic potential is studied using accurate quantum chemistry approaches. The results show that the Wigner regime can be achieved with small values of the confinement parameter. A semi-analytical model for two electrons is used to gain insights into the results. By analyzing electronic structure properties such as the one-body density and the particle-hole entropy, a path connecting the Wigner regime to the Fermi-gas regime is defined by varying the confinement parameter. The particle-hole entropy exhibits a maximum that could be interpreted as the transition point between the localized and delocalized regimes.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Physics, Multidisciplinary
Carolyn Zhang, Tobias Holder, Netanel H. Lindner, Mark S. Rudner, Erez Berg
Summary: This study demonstrates the realization of an Anomalous Floquet-Anderson insulator (AFAI) phase in a driven, disordered Quantum Anomalous Hall insulator. By driving the system at a frequency close to resonance between two critical energies, the critical states are localized and the Chern bands are annihilated, resulting in the formation of the AFAI phase.
Article
Chemistry, Multidisciplinary
Fatemeh Barati, Trevor B. Arp, Shanshan Su, Roger K. Lake, Vivek Aji, Rienk van Grondelle, Mark S. Rudner, Justin C. W. Song, Nathaniel M. Gabor
Summary: Stack engineering is a metamaterial strategy that allows for the design of optical and electronic properties. In this study, the optoelectronic effects of stacking-induced strong coupling and interlayer excitons in heterojunction photodiodes were revealed.
Article
Chemistry, Multidisciplinary
Arpit Arora, Mark S. Rudner, Justin C. W. Song
Summary: This study reveals a new type of plasmons, called quantum metric plasmons (QMPs), which appear in parity-violating magnetic metals and exhibit nonreciprocal properties. The research finds that QMPs are sensitive to time-reversal and parity violations, even when the single-particle dispersion is symmetric.
Article
Physics, Multidisciplinary
Abhishek Banerjee, Max Geier, M. Ahnaf Rahman, Daniel S. Sanchez, Candice Thomas, Tian Wang, Michael J. Manfra, Karsten Flensberg, Charles M. Marcus
Summary: Opposite phase-inversion asymmetries are observed in local tunneling spectra at the two ends of a superconductor-semiconductor-superconductor planar Josephson junction in the presence of a perpendicular magnetic field. The nonlocal spectra, however, remain phase symmetric. The experimental results agree with a theoretical model, which provides a physical explanation for the localization and control of Andreev bound states in the junction.
PHYSICAL REVIEW LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Waldemar Svejstrup, Andrea Maiani, Kevin Van Hoogdalem, Karsten Flensberg
Summary: The reliability of quantum nanoelectronic devices depends on precise control of the electrostatic environment. Accurate methods for electrostatic simulations are essential in the design process. The Thomas-Fermi (TF) approximation and Schrodinger-Poisson (SP) method are commonly used, but they have shortcomings in terms of accounting for quantum confinement and scalability. This paper introduces an orbital-free approach inspired by density functional theory, which incorporates corrections for quantum confinement while maintaining scalability for large-scale electrostatic simulations of quantum nanoelectronic devices.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Jens Schulenborg, Svend Krojer, Michele Burrello, Martin Leijnse, Karsten Flensberg
Summary: In this study, a low-energy model describing localized edge states in a two-arm device is proposed. Parity-to-charge conversion is achieved by coupling the superconductor bound states to a quantum dot and reading out its charge with a sensor. The dynamics of the system, including the readout device, is fully analyzed using a quantum-jump approach. It is demonstrated how the resulting signal and signal-to-noise ratio can differentiate between local Majorana and Andreev bound states.
Article
Materials Science, Multidisciplinary
Andrea Maiani, Max Geier, Karsten Flensberg
Summary: This paper presents a method for investigating Andreev bound states using nonlocal tunneling spectroscopy of semiconductor-superconductor hybrid devices. By exploiting microscopic and geometrical symmetries, information on transmission probabilities can be extracted from the conductance matrix. A numerical model is used to identify the direction and strength of spin-orbit coupling, and the effects of voltage bias and quasiparticle leakage on symmetry relations are investigated.
Article
Materials Science, Multidisciplinary
Assaf Voliovich, Mark S. Rudner, Yuval Oreg, Erez Berg
Summary: In this study, we investigate competing insulating phases in nearly metallic zigzag carbon nanotubes. We find that an applied magnetic flux does not close and reopen the single-particle gap near a specific valley. By using a bosonic low-energy effective theory, we construct a phase diagram that shows several competing insulating phases that can form near the closing point of the single-particle gap. These phases are characterized by spin-resolved charge polarization densities, and can take different values due to mirror symmetry breaking. In the mirror symmetry breaking phase, adiabatic changes of the orbital magnetic flux drive charge and spin currents along the nanotube.
Article
Materials Science, Multidisciplinary
Ruben Seoane Souto, Matteo M. Wauters, Karsten Flensberg, Martin Leijnse, Michele Burrello
Summary: In this study, the low-bias transport features of hybrid superconducting-semiconducting devices are analyzed, focusing on the subgap states. The transport spectroscopy patterns are used to characterize the topological nature of these devices and offer the possibility of controlling their transport properties. It is found that the nonlocal differential conductance can characterize the spatial extension of the subgap states and indicate the presence of degenerate bound states with finite support and energy crossings.
Article
Materials Science, Multidisciplinary
Davi R. Rodrigues, Akshaykumar Salimath, Karin Everschor-Sitte, Kjetil M. D. Hals
Summary: In recent years, antiferromagnets (AFMs) have shown great potential for nanoscale spintronic applications due to their unique properties. However, manipulating antiferromagnetic textures is currently only possible in a few exceptional material symmetry classes. In this study, we predict a new coupling mechanism between antiferromagnetic domain walls (DWs) and spin currents in kagome AFMs with broken mirror symmetry, through the relativistic Dzyaloshinskii-Moriya interaction (DMI). We derive the DMI's free-energy contribution for kagome AFMs and show that it induces a highly nontrivial, twisted DW profile that can be controlled through the spin accumulation.
Article
Materials Science, Multidisciplinary
Jonas Nothhelfer, Sebastian A. Diaz, Stephan Kessler, Tobias Meng, Matteo Rizzi, Kjetil M. D. Hals, Karin Everschor-Sitte
Summary: In this study, we successfully experimentally confirmed the non-Abelian statistics of Majorana zero modes and proposed a method to control skyrmion-vortex pairs, providing a possibility for the establishment of a scalable topological quantum computing platform.
Article
Materials Science, Multidisciplinary
Hongzheng Zhao, Mark S. Rudner, Roderich Moessner, Johannes Knolle
Summary: This article demonstrates the existence of non-equilibrium topological phases in aperiodically driven systems, even without time translation symmetry. By studying a two-dimensional system driven by random multipolar forces, the researchers first observe longlived prethermal Anderson localization. They then show that this localization can have topological properties, including quantized bulk orbital magnetization, even without well-defined Floquet operators. The existence of this anomalous random multipolar driven insulator is further confirmed through the detection of quantized charge pumping at the boundaries, making it experimentally observable.
Article
Physics, Multidisciplinary
Ying Xiong, Mark S. Rudner, Justin C. W. Song
Summary: The article introduces the nonlinear nature of the excitonic Stark effect, known as multistable Stark effect (MSE), in a nanophotonic cavity. The MSE arises from the feedback between the cavity mode and excitonic population, and can even occur at very low exciton concentrations.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Raffael Gawatz, Ajit C. Balram, Erez Berg, Netanel H. Lindner, Mark S. Rudner
Summary: We investigated the formation of quasisteady states in one-dimensional pumps of interacting fermions at noninteger filling fraction. We found that potential disorder significantly reduces the amplitude of fluctuations of the quasisteady-state current, and the natural orbital occupations and the entanglement entropy display patterns signifying the periodic entangling and disentangling of the system's degrees of freedom. Moreover, prominent features in the system's time-dependent entanglement spectrum reveal the emergence of long timescales associated with the equilibration of many-particle correlations.
Article
Materials Science, Multidisciplinary
S. Vaitiekenas, R. Seoane Souto, Y. Liu, P. Krogstrup, K. Flensberg, M. Leijnse, C. M. Marcus
Summary: Through Coulomb blockade transport studies, we found that cotunneling features in the even-odd bias spectra of nanowires grown with superconducting Al and ferromagnetic insulator EuS on overlapping facets are associated with spin-polarized Andreev levels. Experimental results indicate that the zero-field spin splitting exceeds the induced superconducting gap and the energy of subgap states can be controlled by electrostatic gates.
