Article
Physics, Fluids & Plasmas
Svetislav Mijatovic, Dragutin Jovkovic, Djordje Spasojevic
Summary: The study provides numerical evidence for the absence of critical behavior of the nonequilibrium athermal random-field Ising model on the hexagonal two-dimensional lattice in adiabatic regime. The results are based on systems with up to 32 768 x 32 768 spins and show differences from previous findings on square and triangular lattices, supporting the hypothesis that the number of nearest neighbors affects model criticality.
Article
Physics, Multidisciplinary
Matteo Metra, Luc Zorrilla, Maurizio Zani, Ezio Puppin, Paolo Biscari
Summary: In this study, 2D random Ising ferromagnetic models with quenched disorder are considered, represented by random local magnetic fields or a random distribution of interaction couplings. Zero- and finite-temperature Monte Carlo simulations were used to determine the critical temperature dependence on the disorder parameter. The focus was on the reversal transition triggered by an external field and the associated Barkhausen noise, with the main result showing critical exponents associated with the power law of Barkhausen noise exhibiting temperature dependence consistent with experimental observations.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Chemistry, Physical
Ujjwal Kumar Nandi, Walter Kob, Sarika Maitra Bhattacharyya
Summary: The study proposes a novel model for a glass-forming liquid that introduces additional particle-particle interactions to alter the liquid's properties. The system's structure remains unchanged, but dynamics are affected, resulting in slower relaxation dynamics, increased onset and mode-coupling temperatures. As the system approaches a mean-field-like state, dynamic heterogeneity decreases, while the non-Gaussian parameter remains unaffected.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Emil Bronstein, Laszlo Zoltan Toth, Lajos Daroczi, Dezso Laszlo Beke, Ronen Talmon, Doron Shilo
Summary: The study investigates the jerky motion of twin boundaries in the ferromagnetic shape memory alloy Ni-Mn-Ga through simultaneous measurements of stress and magnetic emissions. It reveals a linear relationship between ME voltage and volumes exhibiting twinning transformation during abrupt avalanche events. The analysis shows that the distributions of ME avalanches follow power laws with exponential truncations, with cutoff values relating to physical characteristics of the problem. The observation suggests that avalanches during slow rate twin boundary motion and velocity changes observed in high rate tests represent the same behavior and can be described by the same theory.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Mechanics
Andrea Baldassarri
Summary: The ABBM model, introduced in the context of hysteresis physics in magnetic materials, has been applied to describe crackling noise phenomena. Through exact calculations of avalanche shapes and comparisons with multi-avalanche shapes, it was found that their normalized shapes are exactly the same. This finding applies to various stochastic processes, demonstrating a correspondence between the excursion and bridge shape distributions.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2021)
Article
Physics, Multidisciplinary
Feng Liu, Zhenhao Fan, Zhipeng Sun, Xuzong Chen, Dingping Li
Summary: The systematic non-perturbative method developed based on Dyson-Schwinger theory and the derivable theory for Ising model at broken phase allows for obtaining critical temperature and spin spin correlation beyond mean field theory. The gapless spectrum of Green function obtained from this method at critical point results in divergent susceptibility at T-c. The critical temperature of Ising model obtained from this method is fairly good compared to other non-cluster methods and can be extended to more complex spin models with continuous symmetry.
FRONTIERS OF PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Manuel Weber
Summary: We have presented an exact quantum Monte Carlo method that can simulate spin systems coupled to dissipative bosonic baths. This method uses nonlocal wormhole updates to simulate the retarded spin-flip interactions originating from an off-diagonal spin-boson coupling and can be applied to impurity systems and lattice models in any spatial dimension.
Article
Physics, Fluids & Plasmas
Matthew R. Carbone, Marco Baity-Jesi
Summary: In this study, we investigate two different types of activated dynamics in simplified models of glasses, and find that one type may dominate over the other under specific conditions, with temperature and density of states shape playing a role. Additionally, we propose a possible phase transition between the two types of activation at low temperatures, and use our observations to provide a unified description of the slowdown of glasses, reconciling the facilitation and thermodynamic pictures.
Article
Chemistry, Physical
Norihiro Oyama, Hideyuki Mizuno, Atsushi Ikeda
Summary: Glass phases in soft matter systems are still not well understood, but the concept of marginal stability shows promise as a unique feature of glasses. Non-Debye scaling has been observed universally, but the Gardner phase is limited to certain glasses. This study demonstrates that plastic events in two-dimensional Lennard-Jones glasses under shear exhibit statistical properties consistent with the energy landscape associated with the Gardner phase.
Article
Physics, Fluids & Plasmas
Djordje Spasojevic, Stefan Graovac, Sanja Janicevic
Summary: We investigate the effects of different types of driving (adiabatic, quasistatic, and finite-rate) on the evolution of disordered three-dimensional ferromagnetic systems based on the nonequilibrium athermal random field Ising model. Our study examines the effects in all three domains of disorder and a wide range of driving rates, providing a comprehensive overview and comparison of the joint effects of disorder, driving type, and rate regime on the system's behavior.
Article
Materials Science, Multidisciplinary
M. Neslusan, K. Zgutova, R. Cep, M. Pitonak, F. Andejka
Summary: This paper discusses the Barkhausen noise emission in soft magnetic ribbon produced through planar flow casting and subsequent heat treatment in an external magnetic field. The measurements were conducted in the direction of domain wall alignment and in the perpendicular direction. Three separate regions were observed in the Barkhausen noise bursts, with the second region being the strongest due to the motion of the 180 degrees domain wall. The hysteresis loops extracted from the Barkhausen noise also exhibit three separate avalanches, with the second region emitting a lower number of stronger pulses.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Automation & Control Systems
Miroslav Neslusan, Martin Pitonak, Jiri Capek, Pavel Kejzlar, Libor Trsko, Katarna Zgutova, Jan Slota
Summary: This study investigates the rate of transformation induced plasticity in TRIP steel after plastic straining using Barkhausen noise emission. The samples were analyzed using SEM, XRD, and microhardness to study residual stress and microstructural alterations caused by uniaxial tensile test. It was found that Barkhausen noise decreases with increasing plastic straining and reaches saturation in a certain strain region. Samples after the tensile test exhibit marked magnetic anisotropy.
Article
Physics, Fluids & Plasmas
M. A. Moore
Summary: Simulation studies of spin glasses since the early 2010s have been focused on the replicon exponent a, aiming to determine whether the low-temperature phase of spin glasses follows the replica symmetry breaking picture of Parisi or the droplet-scaling picture. According to the droplet-scaling picture, the value of a is expected to be zero only for systems with a linear dimension greater than a certain critical value L*, which may be on the order of hundreds of lattice spacings in three dimensions.
Article
Chemistry, Physical
Maciej Roskosz, Krzysztof Fryczowski, Lechoslaw Tuz, Jianbo Wu, Krzysztof Schabowicz, Dominik Logon
Summary: An analysis was conducted on the possibility of assessing the degree of plastic deformation epsilon in X2CrNi18-9 steel by measuring electromagnetic diagnostic signals. Sensitivity regions were identified for different features of the diagnostic signals, with critical deformation values separating them. Metallographic tests revealed essential changes in the microstructure of the material, as well as a magnetic phase generated by martensite transformation during plastic deformation of the steel.
Article
Physics, Mathematical
Federico Ettori, Filippo Perani, Stefano Turzi, Paolo Biscari
Summary: We study the qualitative and quantitative properties of Barkhausen noise in random Ising models at finite temperatures. The random-bond Ising Model is investigated using a Wolff cluster Monte-Carlo algorithm to observe the avalanches induced by an external magnetic field. We find satisfactory power-law distributions that span over five decades, and the temperature-dependent critical exponent agrees with experimental measurements. We also examine an Ising system with quenched defects, which shows a critical response to a slowly oscillating magnetic field with a critical exponent close to 1, indicating the same universality class across different defect fractions and temperatures.
JOURNAL OF STATISTICAL PHYSICS
(2023)
Article
Biochemistry & Molecular Biology
Markus Mueller, Peter M. Derlet, Christopher Mudry, Gabriel Aeppli
Article
Physics, Multidisciplinary
Z. Guguchia, D. Das, C. N. Wang, T. Adachi, N. Kitajima, M. Elender, F. Brueckner, S. Ghosh, V Grinenko, T. Shiroka, M. Mueller, C. Mudry, C. Baines, M. Bartkowiak, Y. Koike, A. Amato, J. M. Tranquada, H. H. Klauss, C. W. Hicks, H. Luetkens
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Applied
Yves Blickenstorfer, Markus Mueller, Roland Dreyfus, Andreas Michael Reichmuth, Christof Fattinger, Andreas Frutiger
Summary: Diffractometric biosensing is a promising technology that overcomes limitations of refractometric biosensors, but it lacks general quantitative analysis, hindering its wider recognition and comparison with other techniques.
PHYSICAL REVIEW APPLIED
(2021)
Article
Chemistry, Physical
Junzhang Ma, Simin Nie, Xin Gui, Muntaser Naamneh, Jasmin Jandke, Chuanying Xi, Jinglei Zhang, Tian Shang, Yimin Xiong, Itzik Kapon, Neeraj Kumar, Yona Soh, Daniel Gosalbez-Martinez, Oleg Yazyev, Wenhui Fan, Hannes Huebener, Umberto De Giovannini, Nicholas Clark Plumb, Milan Radovic, Michael Andreas Sentef, Weiwei Xie, Zhijun Wang, Christopher Mudry, Markus Mueller, Ming Shi
Summary: Using angle-resolved photoemission spectroscopy, the authors detected mobile bound states of excitons in quasi-one-dimensional metallic TaSe3, providing evidence for the elusive exciton mobility in metals.
Article
Physics, Multidisciplinary
Cathelijne ter Burg, Felipe Bohn, Gianfranco Durin, Rubem Luis Sommer, Kay Jorg Wiese
Summary: We demonstrate the validity of the functional renormalization group by measuring force correlations in Barkhausen-noise experiments. Our results show that the force correlations have a universal form predicted by the functional renormalization group, with distinct characteristics for short-range and long-range elasticity. Additionally, we find that the correlations are mostly independent of eddy currents. These findings provide important insights into domain wall behavior in ferromagnetic materials.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Jiajun Li, Markus Muller, Aaram J. Kim, Andreas M. Lauchli, Philipp Werner
Summary: Recent advances in ultrafast pump-probe spectroscopy have allowed the exploration of hidden phases of correlated matter, including light-induced superconducting states. A new type of chiral superconducting phase has been induced in frustrated Mott insulators through photodoping, forming a condensate of doublons and holons. This metastable phase features a spatially varying order parameter with a 120 degrees phase twist, breaking time-reversal and inversion symmetry. The presented results demonstrate the chiral nature of the light-induced superconducting state and its distinguishing properties, which can be observed in pump-probe experiments.
Article
Optics
Keita Omiya, Markus Muller
Summary: We study the nature of the ergodicity-breaking quantum many-body scar states in the PXP model and reveal a common structure that gives rise to these states. We provide an extension of the PXP model that can host exact quantum scars and show that existing scar-stabilizing extensions can be understood within this framework. The exact scar states are obtained as large spin states of explicitly constructed pseudospins, and the quasiperiodic motion is shown to be the projection of the large pseudospin's precession onto the Rydberg-constrained subspace.
Article
Materials Science, Multidisciplinary
A. Beckert, M. Grimm, R. Hermans, J. R. Freeman, E. H. Linfield, A. G. Davies, M. Muller, H. Sigg, S. Gerber, G. Matmon, G. Aeppli
Summary: The crystal field energy levels and magnetic moments of the insulating rare-earth magnet LiY1-xHoxF4 were investigated, including the hyperfine corrections, and the far-infrared, low-temperature refractive index of the material was determined.
Review
Physics, Multidisciplinary
Kay Jorg Wiese
Summary: This review introduces several systems based on elastic systems that can be seen as elastic systems subject to quenched disorder. It discusses the renormalization group method and various techniques that enable the study of equilibrium and depinning in these systems as well as the properties of related observables. It also covers equivalences between different systems and mapping methods between them.
REPORTS ON PROGRESS IN PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Federico Elias, Alejandro B. Kolton, Kay Jorg Wiese
Summary: In this study, the dynamics of a single directed elastic string driven through a three-dimensional disordered medium is investigated numerically and analytically. The results show that in the driving direction, the string is super-rough with certain roughness, dynamic, correlation-length, depinning, and avalanche-size exponents. The transverse fluctuations do not affect the critical exponents in the driving direction. Random-bond and random-field disorder yield the same universality class as a two-dimensional random medium. The distribution of local displacements has different characteristics in the parallel and transverse directions.
Article
Physics, Fluids & Plasmas
Tridib Sadhu, Kay Jorg Wiese
Summary: Fractional Brownian motion, a non-Markovian Gaussian process indexed by the Hurst exponent H within (0, 1), is studied for its functionals in this paper. A perturbation expansion is used to evaluate these observables analytically, revealing different probabilities for the three functionals except for H = 1/2. Numerical simulations confirmed the high precision of the results.
Article
Quantum Science & Technology
Manuel Grimm, Adrian Beckert, Gabriel Aeppli, Markus Mueller
Summary: The proposed scheme for universal quantum computing is based on Kramers rare-earth ions, utilizing their nuclear spins as passive qubits and actively switching on qubits optically. The implementation of controlled NOT (CNOT) gates relies on the magnetic dipole interaction between excited crystal field states. Compared to other proposals, such as the Si:P proposal, this scheme shows significantly improved gate times for CNOT gates.
Article
Physics, Fluids & Plasmas
Cathelijne ter Burg, Kay Jorg Wiese
Summary: Mean-field theory approximates extended systems using a few variables, such as the position and statistics of forces for elastic manifolds. Two models, ABBM and DPM, can be used to simulate force distributions. However, microscopic disorder force-force correlations cannot grow linearly and must be bounded, leading to the need for an Ornstein-Uhlenbeck process to account for both small and large scales. Experimental signatures of this transition can be studied through response and correlation functions.
Article
Physics, Multidisciplinary
Kay Jorg Wiese, Mathilde Bercy, Lena Melkonyan, Thierry Bizebard
PHYSICAL REVIEW RESEARCH
(2020)
Article
Physics, Multidisciplinary
Andrea Scaramucci, Hiroshi Shinaoka, Maxim Mostovoy, Rui Lin, Christopher Mudry, Markus Mueller
PHYSICAL REVIEW RESEARCH
(2020)
