176 citations · 1.9k across the 82 of their papers we have counts for
82 papers
Spectral and Entanglement Properties of the Random Exchange Heisenberg Chain
Yilun Gao, Rudolf A. Römer
We study the many-body localization problem in the non-abelian SU(2)-invariant random antiferromagnetic exchange model in 1D. Exact and sparse matrix diagonalization methods are us…
Real-space renormalisation approach to the Chalker-Coddington model revisited: improved statistics
Syl Shaw, Rudolf A. Römer
The real-space renormalisation group method can be applied to the Chalker-Coddington model of the quantum Hall transition to provide a convenient numerical estimation of the locali…
Phase determination with and without deep learning
Burak Çivitcioğlu, Rudolf A. Römer, Andreas Honecker
Detection of phase transitions is a critical task in statistical physics, traditionally pursued through analytic methods and direct numerical simulations. Recently, machine-learnin…
Quantum engineering for compactly localized states in disordered Lieb lattices
Carlo Danieli, Jie Liu, Rudolf A. Römer
Blending ordering within an uncorrelated disorder potential in families of 3D Lieb lattices preserves the macroscopic degeneracy of compact localized states and yields unconvention…
The percolating cluster is invisible to image recognition with deep learning
Djénabou Bayo, Andreas Honecker, Rudolf A. Römer
We study the two-dimensional site-percolation model on a square lattice. In this paradigmatic model, sites are randomly occupied with probability ; a second-order phase transiti…
Unconventional delocalization in a family of 3D Lieb lattices
Jie Liu, Carlo Danieli, Jianxin Zhong +1
Uncorrelated disorder in generalized 3D Lieb models gives rise to the existence of bounded mobility edges, destroys the macroscopic degeneracy of the flat bands and breaks their co…
Machine Learning the Square-Lattice Ising Model
Burak Çivitcioğlu, Rudolf A. Römer, Andreas Honecker
Recently, machine-learning methods have been shown to be successful in identifying and classifying different phases of the square-lattice Ising model. We study the performance and…
Machine learning the 2D percolation model
Djénabou Bayo, Andreas Honecker, Rudolf A. Römer
We use deep-learning strategies to study the 2D percolation model on a square lattice. We employ standard image recognition tools with a multi-layered convolutional neural network.…
Loschmidt echo singularities as dynamical signatures of strongly localized phases
Leonardo Benini, Piero Naldesi, Rudolf A. Römer +1
Quantum localization (single-body or many-body) comes with the emergence of local conserved quantities -- whose conservation is precisely at the heart of the absence of transport t…
Lattice thermal conductivity of graphene nanostructures
M. Saiz-Bretin, A. V. Malyshev, F. Dominguez-Adame +2
Non-equilibrium molecular dynamics is used to investigate the heat current due to the atomic lattice vibrations in graphene nanoribbons and nanorings under a thermal gradient. We c…
Touching proteins with virtual bare hands: how to visualize protein-drug complexes and their dynamics in virtual reality
Erick Martins Ratamero, Dom Bellini, Christopher G. Dowson +1
The ability to precisely visualize the atomic geometry of the interactions between a drug and its protein target in structural models is critical in predicting the correct modifica…
New allotropes of phosphorene with remarkable stability and intrinsic piezoelectricity
Zhenqing Li, Chaoyu He, Tao Ouyang +4
In this letter, we show that a new class of two-dimensional phosphorus allotropes can be constructed via assembling the previously proposed ultrathin metastable phosphorus nanotube…
Spin filter for arbitrary spins by substrate engineering
Biplab Pal, Rudolf A. Römer, Arunava Chakrabarti
We design spin filters for particles with potentially arbitrary spin S (= 1/2, 1, 3/2,....) using a one-dimensional periodic chain of magnetic atoms as a quantum device. Describing…
Higher-order local and non-local correlations for 1D strongly interacting Bose gas
E. J. K. P. Nandani, Rudolf A. Roemer, Shina Tan +1
The correlation function is an important quantity in the physics of ultracold quantum gases because it provides information about the quantum many-body wave function beyond the sim…
Dimensionless ratios: characteristics of quantum liquids and their phase transitions
Yi-Cong Yu, Yang-Yang Chen, Hai-Qing Lin +2
Dimensionless ratios of physical properties can characterize low-temperature phases in a wide variety of materials. As such, the Wilson ratio (WR), the Kadowaki-Woods ratio and the…
Using entanglement to discern phases in the disordered one-dimensional Bose-Hubbard model
Andrew M. Goldsborough, Rudolf A. Römer
We perform a matrix product state based density matrix renormalisation group analysis of the phases for the disordered one-dimensional Bose-Hubbard model. For particle densities N/…
Characterizing the folding core of the cyclophilin A - cyclosporin A complex II: improving folding core predictions by including mobility
J. W. Heal, S. A. Wells, R. B. Freedman +1
Determining the folding core of a protein yields information about its folding process and dynamics. The experimental procedures for identifying the amino acids which make up the f…
Characterizing the folding core of the cyclophilin A - cyclosporin A complex I: hydrogen exchange data and rigidity analysis
J. W. Heal, R. A. Römer, C. A. Blindauer +1
The determination of a 'folding core' can help to provide insight into the structure, flexibility, mobility and dynamics, and hence, ultimately, function of a protein - a central c…
Leaf-to-leaf distances and their moments in finite and infinite m-ary tree graphs
Andrew M. Goldsborough, S. Alex Rautu, Rudolf A. Römer
We study the leaf-to-leaf distances on full and complete m-ary graphs using a recursive approach. In our formulation, leaves are ordered along a line. We find explicit analytical f…
Self-assembling tensor networks and holography in disordered spin chains
Andrew M. Goldsborough, Rudolf A. Römer
We show that the numerical strong disorder renormalization group algorithm (SDRG) of Hikihara et. al. [Phys. Rev. B 60, 12116 (1999)] for the one-dimensional disordered Heisenberg…
Localisation and finite-size effects in graphene flakes
C. González-Santander, F. Domínguez-Adame, M. Hilke +1
We show that electron states in disordered graphene, with an onsite potential that induces inter-valley scattering, are localised for all energies at disorder as small as 1/6 of th…
Controlled engineering of extended states in disordered systems
Alberto Rodriguez, Arunava Chakrabarti, Rudolf A. Römer
We describe how to engineer wavefunction delocalization in disordered systems modelled by tight-binding Hamiltonians in d>1 dimensions. We show analytically that a simple product s…
Robust signatures in the current-voltage characteristics of DNA molecules oriented between two graphene nanoribbon electrodes
Carlos J. Páez, Peter A. Schulz, Neil Wilson +1
In this work we numerically calculate the electric current through three kinds of DNA sequences (telomeric, λ-DNA, and p53-DNA) described by different heuristic models. A bias volt…
Localization-delocalization transition for disordered cubic harmonic lattices
Sebastian D. Pinski, Walter Schirmacher, Terry Whall +1
We study numerically the disorder-induced localization-delocalization phase transitions that occur for mass and spring constant disorder in a three-dimensional cubic lattice with h…