Latest in cond-mat.dis-nn
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Atomic Vibrations in GlassesAug 22 2019In glasses, atomic disorder combined with atomic connectivity makes understanding of the nature of the vibrations much more complex than in crystals or molecules. With a simple model, however, it is possible to show how disorder generates quasi-local ... More The Jamming Energy Landscape is Hierarchical and UltrametricAug 22 2019The free energy landscape of mean field marginal glasses is ultrametric. We demonstrate that this feature remains in finite 3 dimensional systems by finding sets of minima which are nearby in configuration space. By calculating the distance between these ... More Memristive Networks: from Graph Theory to Statistical PhysicsAug 21 2019We provide an introduction to a very specific toy model of memristive networks, for which an exact differential equation for the internal memory which contains the Kirchhoff laws is known. In particular, we highlight how the circuit topology enters the ... More Dynamic disorder induced memristance in amorphous solidsAug 21 2019Motivated by the recent discovery of several amorphous oxides exhibiting remarkable threshold switching and hysteresis in the current-voltage response, we outline a purely quantum mechanism of memristance based on Anderson localization. Concerting first ... More Measurement-induced criticality in random quantum circuitsAug 21 2019We investigate the critical behavior of the entanglement transition induced by projective measurements in (Haar) random unitary quantum circuits. Using a replica approach, we map the calculation of the entanglement entropies in such circuits onto a two-dimensional ... More Power-law entanglement growth from typical product statesAug 19 2019Generic quantum many-body systems typically show a linear growth of the entanglement entropy after a quench from a product state. While entanglement is a property of the wave function, it is generated by the unitary time evolution operator and is therefore ... More Disorder driven multifractality transition in Weyl nodal loopsAug 19 2019The effect of short-range disorder in nodal line semimetals is studied by numerically exact means. For arbitrary small disorder, a novel semimetallic phase is unveiled for which the momentum-space amplitude of the ground-state wave function is concentrated ... More Isomorph invariance of dynamics of sheared glassy systemsAug 19 2019We study hidden scale invariance in the glassy phase of the Kob-Andersen binary Lennard-Jones system. After cooling below the glass transition, we generate a so-called isomorph from the fluctuations of potential energy and virial in the NVT ensemble -- ... More Taming two interacting particles with disorderAug 19 2019We compute the scaling properties of the localization length $\xi_2$ of two interacting particles in a one-dimensional chain with diagonal disorder, and the connectivity properties of the Fock states. We analyze record large system sizes (up to $N=20000$) ... More Two-photon absorption in a two-level system enabled by noiseAug 18 2019We address the textbook problem of dynamics of a spin placed in a dc magnetic field and subjected to an ac drive. If the drive is polarized in the plane perpendicular to the dc field, the drive photons are resonantly absorbed when the spacing between ... More An exploratory study of the glassy landscape near jammingAug 16 2019We present the study of the landscape structure of athermal soft spheres both as a function of the packing fraction and of the energy. We find that, on approaching the jamming transition, the number of different configurations available to the system ... More Machine learning magnetic parameters from spin configurationsAug 16 2019Estimation of Hamiltonian is key to our understanding of everything in quantum mechanics. For magnetic systems, in particular, the task can be daunting due to the exponentially large Hilbert space. Here, we show that modern machine learning architectures, ... More Many-Body Localization LandscapeAug 14 2019We generalize the notion of "localization landscape," introduced by M. Filoche and S. Mayboroda [Proc. Natl. Acad. Sci. USA 109, 14761 (2012)] for the single-particle Schrodinger operator, to a wide class of interacting many-body Hamiltonians. The many-body ... More Quasi-periodic quantum thermal machinesAug 14 2019Steady-state thermoelectric machines convert heat into work by driving a thermally-generated charge current against a voltage gradient. In this work, we propose a new class of steady-state heat engines operating in the quantum regime, where a quasi-periodic ... More Boolean constraint satisfaction problems for reaction networksAug 13 2019This Thesis presents research at the boundary between Statistical Physics and Biology. First, we have devised a class of Boolean constraint satisfaction problems (CSP) whose solutions describe the feasible operational states of a chemical reaction network. ... More Classical Information Theory of NetworksAug 10 2019Heterogeneity is among the most important features characterizing real-world networks. Empirical evidence in support of this fact is unquestionable. Existing theoretical frameworks justify heterogeneity in networks as a convenient way to enhance desirable ... More Generalized random matrix model with additional interactionsAug 10 2019We introduce a generalized form of the random matrix ensemble with additional interaction, the strength of which depends on a parameter $\gamma$. The equilibrium density is computed by numerically solving the Riemann-Hilbert problem associated with the ... More Disorder in Twisted Bilayer GrapheneAug 07 2019We develop a theory for a qualitatively new type of disorder in condensed matter systems arising from local twist-angle fluctuations in two strongly coupled van der Waals monolayers twisted with respect to each other to create a flat band moir\'e superlattice. ... More Non-Hermitian Topological Anderson InsulatorsAug 03 2019Non-Hermitian systems can exhibit unique topological and localization properties. Here we elucidate the non-Hermitian effects on disordered topological systems by studying a non-Hermitian disordered Su-Schrieffer-Heeger model with nonreciprocal hoppings. ... More Supersymmetry in the nonsupersymmetric Sachdev-Ye-Kitaev modelAug 02 2019Supersymmetry is a powerful concept in quantum many-body physics. It helps to illuminate ground state properties of complex quantum systems and gives relations between correlation functions. In this work, we show that the Sachdev-Ye-Kitaev model, in its ... More Scattering Theory of Transport Through Disordered MagnetsAug 02 2019We present a scattering theory of transport through noncollinear disordered magnetic insulators. For concreteness, we study and compare the random field model (RFM) and the random anisotropy model (RAM). We utilize the Landauer-B{\"u}ttiker formalism ... More Scattering Theory of Transport Through Disordered MagnetsAug 02 2019Aug 05 2019We present a scattering theory of transport through noncollinear disordered magnetic insulators. For concreteness, we study and compare the random field model (RFM) and the random anisotropy model (RAM). We utilize the Landauer-B{\"u}ttiker formalism ... More Instability of disorder-free localizationJul 31 2019The phenomenon of localization is usually accompanied with the presence of quenched disorder. To what extent disorder is necessary for localization is a well-known open problem. In this paper, we prove the instability of disorder-free localization. For ... More Simulating complex quantum networks with time crystalsJul 30 2019Crystals arise as a result of the breaking of a spatial translation symmetry. Similarly, periodically-driven systems host non-equilibrium states when discrete symmetries in time are broken. These exotic phases are often referred to as time crystals. Here ... More On the delta function broadening in the Kubo-Greenwood equationJul 30 2019Understanding DC electrical conductivity is crucial for the study of materials. Macroscopic DC conductivity can be calculated from first principles using the Kubo-Greenwood equation. The procedure involves finding the thermodynamic limit of the current ... More Analog Errors in Quantum Annealing: Doom and HopeJul 29 2019Quantum annealing has the potential to provide a speedup over classical algorithms in solving optimization problems. Just as for any other quantum device, suppressing Hamiltonian control errors will be necessary before quantum annealers can achieve speedups. ... More Does the boson peak survive in an ultrathin oxide glass?Jul 29 2019Bulk glasses exhibit extra vibrational modes at low energies, known as the boson peak. The microscopic dynamics in nanoscale alumina impact the performance of qubits and other superconducting devices, however the existence of the boson peak in these glasses ... More Collective dynamics of random Janus oscillator networksJul 28 2019Janus oscillators have been recently introduced as a remarkably simple phase oscillator model that exhibits non-trivial dynamical patterns -- such as chimeras, explosive transitions, and asymmetry-induced synchronization -- that once were only observed ... More Pseudo-gaps for random hopping modelsJul 26 2019For one-dimensional random Schr\"odinger operators, the integrated density of states is known to be given in terms of the (averaged) rotation number of the Pr\"ufer phase dynamics. This paper develops a controlled perturbation theory for the rotation ... More Richardson diffusion in neuronsJul 25 2019The dynamics of an initial wave packed affected by random noise is considered in the framework of a comb model. The model is relevant to a diffusion problem in neurons where the transport of ions can be accelerated by an external random field due to synapse ... More Quantum Metrology with Strongly Interacting Spin SystemsJul 23 2019Quantum metrology makes use of coherent superpositions to detect weak signals. While in principle the sensitivity can be improved by increasing the density of sensing particles, in practice this improvement is severely hindered by interactions between ... More Explosive Phenomena in Complex NetworksJul 23 2019The emergence of large-scale connectivity and synchronization are crucial to the structure, function and failure of many complex socio-technical networks. Thus, there is great interest in analyzing phase transitions to large-scale connectivity and to ... More Experimental proof of Quantum Zeno-assisted Noise SensingJul 22 2019In the ideal quantum Zeno effect, repeated quantum projective measurements can protect the coherent dynamics of a quantum system. However, in the weak quantum Zeno regime, measurement back-actions can allow the sensing of semi-classical field fluctuations. ... More