Article
Materials Science, Multidisciplinary
Hao Sun, Dhiman Bhowmick, Bo Yang, Pinaki Sengupta
Summary: In this study, we investigate the magnon-magnon interaction effect in van der Waals-bonded honeycomb ferromagnets, such as chromium trihalides (CrX3). We find that the single-particle spectrum is prominently renormalized and propose a tunable renormalization effect through a parametric magnon amplification scheme. By amplifying the magnon population at different k points, we can reshape the band structure and modify the distribution of Berry curvature. This work demonstrates the interplay between band geometry, interactions, and external light fields in a bosonic system, providing insights into magnon-based spintronic devices.
Article
Optics
Damian Wlodzynski
Summary: A method for numerically exact calculation is proposed in this article for a mixture with a single impurity and several majority fermions in a harmonic potential. The method separates one degree of freedom through a tailored canonical transformation and performs exact diagonalization on the simplified Hamiltonian. This method is particularly effective for heavy impurities.
Article
Physics, Multidisciplinary
Xiangyu Yang, Zhen Wang, Abdul-Majid Wazwaz, Zhao Zhang
Summary: We constructed resonant lump chain solutions to the Mel'nikov equation using the Hirota bilinear approach, which involve resonance between lump chains and resonance between lump and lump chains. Our study shows that the resonant interaction of these chains leads to infinite phase shifts, similar to line soliton interactions in the Kadomtsev-Petviashvili-II equation. The interactions are classified into oblique and parallel cases depending on the velocities of the individual lump chains. We also observed obliquely collided lump chains with a Y-shaped structure and identified parallel resonance of lump chains leading to transmission, splitting, or absorption of another lump chain. Additionally, the interactions between lump and lump chains can be semi-localized or completely localized in time.
Article
Physics, Multidisciplinary
David Krueger, Michael Potthoff
Summary: In this study, a generic model of a Chem insulator with a Hubbard interaction in arbitrary even dimension D was explored. The model remains nontrivial in the D -> infinity limit, with dynamical mean-field theory predicting a phase diagram featuring a continuum of topologically different phases. The unconventional features, such as the elusive distinction between insulating and semimetal states, are discussed, with topological phases characterized by a nonquantized Chern density as D -> infinity.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Athanasios Tsintzis, Ruben Seoane Souto, Martin Leijnse
Summary: In this study, an alternative method for creating the "poor man's Majorana bound states" is proposed and theoretically investigated. The localization of MBS is achieved by gate control of three quantum dots, and the quality of MBS is quantified and validated using nonlocal transport spectroscopy.
Article
Materials Science, Multidisciplinary
Natalia Chepiga, Frederic Mila
Summary: We demonstrate in this study that incorporating pairing and repulsion into the description of one-dimensional spinless fermions, as in the domain wall theory of commensurate melting or the interacting Kitaev chain, results in a line of critical points in the eight-vertex universality class for strong repulsion. These critical points terminate the floating phases and exhibit emergent U (1) symmetry. Through extensive density matrix renormalization group (DMRG) simulations of the entire phase diagram, it is confirmed that the variation of the critical exponents along the line, derived from Baxter's exact solution of the XYZ chain at J(x) = -J(z), is fully supported. The qualitative features of the phase diagram are found to be independent of the specific form of the interactions.
Article
Materials Science, Multidisciplinary
Raditya Weda Bomantara
Summary: Researchers theoretically report the emergence of Z(4) parafermion edge modes in a periodically driven spinful superconducting chain with a modest fermionic Hubbard interaction. These exotic quasiparticles can be analytically and exactly derived at special parameter values, and show strong numerical evidence of robustness against variations in parameter values and spatial disorder. This proposal offers a pathway towards realizing parafermions without the need for fractional quantum Hall systems or complicated interactions.
Article
Physics, Multidisciplinary
Keisuke Fujii, Tilman Enss
Summary: In this study, we investigate the bulk viscosity of two-component fermions with a zero-range interaction in both two and three dimensions at high temperatures. We calculate the bulk viscosity using the Kubo formula and expand it with respect to the fugacity, which acts as a small parameter. We find that pinch singularities emerge in the zero-frequency limit of the Kubo formula, reducing the order of the fugacity by one and requiring the resummation of all higher-order contributions. We present an exact microscopic computation for the bulk viscosity, taking into account these pinch singularities.
Article
Materials Science, Multidisciplinary
Cecilia Chiaracane, Francesca Pietracaprina, Archak Purkayastha, John Goold
Summary: The study investigates whether anomalous diffusion in the noninteracting Fibonacci model persists in the presence of interactions and establishes connections to a possible transition towards a localized phase. This is done by studying real-time spread of density-density correlations, calculating the participation entropy in configuration space, and investigating the expectation value of local observables in the diagonal ensemble to corroborate the findings.
Article
Optics
Gianni Aupetit-Diallo, Silvia Musolino, Mathias Albert, Patrizia Vignolo
Summary: We investigate the equilibrium momentum distribution of strongly interacting one-dimensional mixtures of particles at zero temperature confined in a box potential. We find that the magnitude of the tail of the momentum distribution, characterized by 1/k4, is influenced not only by short-distance correlations but also by the presence of rigid walls. This additional contribution, which includes a k-independent term and an oscillating part, breaks the Tan relation and surprisingly encodes information on long-range spin correlations.
Article
Physics, Mathematical
Alessandro Giuliani, Vieri Mastropietro, Marcello Porta
Summary: The study proves the universality of the quadratic response of quasi-particle flow between Weyl nodes in Weyl semimetals, independent of interaction strength and form. This universality demonstrates the non-renormalization property of the chiral anomaly for the infrared emergent description, which is valid in the presence of a lattice and at a non-perturbative level.
COMMUNICATIONS IN MATHEMATICAL PHYSICS
(2021)
Article
Multidisciplinary Sciences
Ranjith R. Kumar, Sujit Sarkar
Summary: This study uses quantum field theoretical methods to explore different emergent quantum phases for interacting topological state of quantum matter. The research shows that electron-electron interaction can alter the topological properties of quantum phases, suggesting that the physics of emergence goes beyond traditional quantum phase transition theory. Analysis of fixed points reveals changes in behavior in the presence and absence of interaction, providing a new perspective for correlated quantum many-body physics.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Multidisciplinary
David S. Dean, Pierre Le Doussal, Satya N. Majumdar, Gregory Schehr, Naftali R. Smith
Summary: The study presents a general method for computing the quantum correlations of N non interacting spinless fermions in their ground state, expressed in terms of a two-point function called the kernel. The method allows for a simple derivation of the local density approximation and the sine kernel in smooth potentials in one dimension, and recovers the density and kernel of the Airy gas at the edge of the trap. Additionally, the method can analyze quantum correlations in the ground state when the potential has a singular part with fast spatial variation.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2021)
Article
Optics
J. Mumford
Summary: A two-dimensional Fock-state lattice is constructed from the many-body states of two interacting two-mode quantum gases to generate a synthetic gauge field. The lattice exhibits nontrivial topology and chirality in the edge states. The effects of intraspecies interactions on the lattice edge motion are also investigated.
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
Physics, Nuclear
Mateusz Buraczynski, Nawar Ismail, Alexandros Gezerlis
EUROPEAN PHYSICAL JOURNAL A
(2020)
Article
Physics, Multidisciplinary
William G. Dawkins, J. Carlson, U. van Kolck, Alexandros Gezerlis
PHYSICAL REVIEW LETTERS
(2020)
Article
Education, Scientific Disciplines
Alexandros Gezerlis, Martin Williams
Summary: This article discusses various erroneous claims in textbooks on numerical methods and computational physics. The authors aim to correct these widespread misconceptions by providing background comments and specific examples drawn from elementary physics and math. Additionally, they offer pointers to the specialist literature for readers who wish to explore specific topics in more detail.
AMERICAN JOURNAL OF PHYSICS
(2021)
Article
Astronomy & Astrophysics
Georgios Palkanoglou, Alexandros Gezerlis
Summary: The study demonstrates that calculations using twisted boundary conditions are effective in reducing finite-size effects. This approach can significantly decrease errors related to extrapolating quantities of superfluid neutron matter.
Article
Astronomy & Astrophysics
Mateusz Buraczynski, Samuel Martinello, Alexandros Gezerlis
Summary: The study examines the static-response function of strongly interacting neutron matter using quantum Monte Carlo approaches and energy-density functional calculations, with results consistent with the compressibility sum rule, providing insights into the physics of neutron-star crusts and neutron-rich nuclei.
Article
Multidisciplinary Sciences
M. E. Mossman, T. M. Bersano, Michael McNeil Forbes, P. Engels
Summary: This study showcases the generation of caustics in the matter waves of an atom laser, demonstrating the application of catastrophe theory in atom optics. By forming caustics through attractive and repulsive potentials, as well as networks generated by multiple potentials, the researchers explore fluid-flow tracing using internal atomic states as another tool in this experimental platform.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Condensed Matter
Stefano Gandolfi, Georgios Palkanoglou, Joseph Carlson, Alexandros Gezerlis, Kevin E. Schmidt
Summary: In this study, we report ab initio calculations and quantum Monte Carlo simulations of the S wave pairing gap in neutron matter. Our results show a modest suppression of the pairing gap compared to mean-field values, and they have implications for cold atom experiments and the cooling of neutron stars.
Article
Physics, Multidisciplinary
Alexandros Gezerlis, Martin Williams
Summary: This article discusses the incorrect statements found in textbooks on data analysis, machine learning, or computational methods, and their relevance to scientific or engineering data. These mistakes are widespread in both textbooks and research literature. The article focuses on mistakes that are prevalent in introductory literature, rather than individual author errors. It provides specific examples of textbook mistakes related to linear regression, refers to specialist literature for proper handling of the topic, and offers corrections that summarize the key points. The mistakes and corrections are relevant to any technical setting where statistical techniques are used to draw practical conclusions, ranging from elementary experimental measurements to advanced regression approaches.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Physics, Multidisciplinary
M. E. Mossman, Ryan A. Corbin, Michael McNeil Forbes, P. Engels
Summary: This article demonstrates the use of atom interferometry to image optical and magnetic potential landscapes. It also shows how advanced pulse sequences can enhance desired imaging features.
PHYSICAL REVIEW LETTERS
(2023)
Article
Optics
Khalid Hossain, Subhadeep Gupta, Michael McNeil Forbes
Summary: In this experiment, a ring geometry is used to directly detect the entrainment effect in a mixture of bosonic and fermionic superfluids. The choice of ring geometry eliminates variations in the mean-field interaction strength, enhancing the detection of entrainment-induced phase gradient.
Article
Physics, Nuclear
Mateusz Buraczynski, Samuel Martinello, Alexandros Gezerlis
Summary: The study investigates pure neutron matter in the presence of a periodic external field by considering a finite number of particles placed in periodic boundary conditions. Noninteracting gas and Skyrme-HartreeFock approaches are used to analyze the static-response results. This research is significant as it provides a general finite-size extrapolation scheme for ab initio practitioners to approach the static-response problem of neutron matter in the thermodynamic limit.
Article
Optics
Khalid Hossain, Konrad Kobuszewski, Michael McNeil Forbes, Piotr Magierski, Kazuyuki Sekizawa, Gabriel Wlazlowski
Summary: This paper presents a large-scale study of quantum turbulence in rotating fermionic superfluids using the superfluid local density approximation. The study identifies different decay mechanisms and compares the results with the computationally simpler Gross-Pitaevskii equation. The results demonstrate the key role of dissipation mechanisms in differentiating fermionic from bosonic turbulence.
Article
Physics, Nuclear
Nawar Ismail, Alexandros Gezerlis
Summary: The study investigates the use of machine learning techniques in extrapolating finite-size effects associated with many-body physics, addressing issues such as small datasets, outliers, and discontinuities. Through systematic investigation and the development of metrics, neural networks are successfully used to extrapolate the unitary gas to the thermodynamic limit at zero range and study the effective mass of strongly interacting neutron matter. The research also involves new auxiliary field diffusion Monte Carlo (AFDMC) calculations to demonstrate the effectiveness of neural networks in this context.
Article
Physics, Nuclear
Georgios Palkanoglou, Fotis K. Diakonos, Alexandros Gezerlis
